Merge branch 'main' into feature/mobile-detection-message

Detect mobile viewport (window.innerWidth < 768) at startup and show a
centered 'Not yet available on mobile' message instead of the full
monitoring UI. All polling, gateway detection, and network requests are
skipped entirely on mobile viewports.

Desktop behavior is completely unchanged — the mobile check is the very
first thing in init() and returns early before any other setup runs.

.dockerignore

@@ -1,6 +1,5 @@
 node_modules
 dist
-tmp
 .DS_Store
 *.log
 .claude

.gitea/workflows/check.yml

@@ -6,5 +6,5 @@ jobs:
         steps:
             # actions/checkout v4.2.2, 2026-02-22
             - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-            # script/cibuild builds the image, whose stages run every check.
             - run: script/cibuild
+            - run: docker build -f Dockerfile.backend .

.gitignore

@@ -1,28 +1,4 @@
-# OS
-.DS_Store
-Thumbs.db
-
-# Editors
-*.swp
-*.swo
-*~
-*.bak
-.idea/
-.vscode/
-*.sublime-*
-
-# Node
 node_modules/
-
-# Environment / secrets
-.env
-.env.*
-*.pem
-*.key
-
-# Build output
 dist/
-tmp/
+.DS_Store
-
-# Logs
 *.log

.prettierignore

@@ -1,6 +1,5 @@
 backend/
 dist/
 node_modules/
-tmp/
 yarn.lock
 .claude/

Dockerfile

@@ -1,86 +1,18 @@
-# The one image netwatch ships: nginx serves the built frontend and
-# passes /api/ and /.well-known/healthcheck to netwatch-server, the Go
-# backend, which runs in the same container on loopback only.
-# bin/entrypoint.sh starts and watches both.
-
-# Lint stage — fast feedback on formatting and lint issues. The
-# golangci/golangci-lint image ships Go, gofmt, make and the linter, so
-# nothing is installed here. The root make lint builds this stage alone.
-# golangci/golangci-lint:v2.12.2 (2026-08-10)
-FROM golangci/golangci-lint@sha256:5cceeef04e53efe1470638d4b4b4f5ceefd574955ab3941b2d9a68a8c9ad5240 AS lint
-
-WORKDIR /src
-COPY backend/go.mod backend/go.sum ./
-RUN go mod download
-COPY backend/ .
-RUN make fmt-check
-RUN make lint
-
-# Backend build stage
-# golang:1.25-alpine (2026-02-27)
-FROM golang:1.25-alpine@sha256:f6751d823c26342f9506c03797d2527668d095b0a15f1862cddb4d927a7a4ced AS builder
-
-RUN apk add --no-cache make
-
-WORKDIR /src
-
-# Force BuildKit to run the lint stage before proceeding. BuildKit runs
-# stages in parallel by default; without this no-op copy a lint failure
-# would not gate compilation.
-COPY --from=lint /src/go.sum /dev/null
-
-COPY backend/go.mod backend/go.sum ./
-RUN go mod download
-COPY backend/ .
-
-RUN make test
-
-# make build is a shim around backend/script/build, the one definition
-# of the build command:
-# CGO_ENABLED=0 go build -trimpath -ldflags "-s -w -X main.Version=... -X main.Buildarch=..."
-# That script reads VERSION from the environment, so it is handed over
-# there rather than as a make variable.
-ARG VERSION=dev
-RUN VERSION="${VERSION}" make build
-
-# Frontend stage
 # node:22-alpine as of 2026-02-22
-FROM node@sha256:e4bf2a82ad0a4037d28035ae71529873c069b13eb0455466ae0bc13363826e34 AS frontend
+FROM node@sha256:e4bf2a82ad0a4037d28035ae71529873c069b13eb0455466ae0bc13363826e34 AS build
 WORKDIR /app
 COPY package.json yarn.lock ./
 RUN yarn install --frozen-lockfile
-RUN apk add --no-cache git make
+RUN apk add --no-cache git
 COPY . .
-# make frontend-check is the frontend half of make check (test + lint +
+RUN yarn build
-# fmt-check); its test step is the production yarn build, so this both
-# produces dist/ and gates the image on lint/fmt-check/test regressions.
-# This node stage has neither Go nor Docker; the lint and builder stages
-# above gate the backend half.
-RUN make frontend-check
 
-# Runtime stage
 # nginx:stable-alpine as of 2026-02-22
 FROM nginx@sha256:15e96e59aa3b0aada3a121296e3bce117721f42d88f5f64217ef4b18f458c6ab
-
-# netwatch-server runs as this user, which owns the report directory.
-# nginx keeps the image's own arrangement: its main process runs as
-# root, its worker processes as the nginx user.
-RUN addgroup -g 1000 -S netwatch && \
-    adduser -u 1000 -S netwatch -G netwatch
-
 RUN rm /etc/nginx/conf.d/default.conf
 COPY nginx.conf /etc/nginx/conf.d/netwatch.conf
-COPY --from=frontend /app/dist /usr/share/nginx/html
+COPY --from=build /app/dist /usr/share/nginx/html
-COPY --from=builder /src/netwatch-server /usr/local/bin/netwatch-server
-COPY bin/entrypoint.sh /usr/local/bin/entrypoint.sh
-
-ENV DATA_DIR=/data/reports
-RUN mkdir -p /data/reports && chown -R netwatch:netwatch /data
-VOLUME /data
 
 EXPOSE 8080
 
-# The nginx image stops its container with SIGQUIT; the entrypoint
+CMD ["nginx", "-g", "daemon off;"]
-# acts on TERM and INT.
-STOPSIGNAL SIGTERM
-ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

Dockerfile.backend

@@ -0,0 +1,25 @@
+# golang:1.25-alpine (2026-02-27)
+FROM golang:1.25-alpine@sha256:f6751d823c26342f9506c03797d2527668d095b0a15f1862cddb4d927a7a4ced AS builder
+
+RUN apk add --no-cache git make gcc musl-dev
+
+# golangci-lint v2.7.2 (2026-02-27)
+RUN CGO_ENABLED=0 go install github.com/golangci/golangci-lint/v2/cmd/golangci-lint@9f61b0f53f80672872fced07b6874397c3ed197b
+
+WORKDIR /repo/backend
+COPY backend/go.mod backend/go.sum ./
+RUN go mod download
+COPY .git /repo/.git
+COPY backend/ .
+
+RUN make check
+RUN make build
+
+# alpine:3.23 (2026-02-27)
+FROM alpine:3.23@sha256:25109184c71bdad752c8312a8623239686a9a2071e8825f20acb8f2198c3f659
+
+RUN apk add --no-cache ca-certificates
+COPY --from=builder /repo/backend/netwatch-server /usr/local/bin/netwatch-server
+
+EXPOSE 8080
+ENTRYPOINT ["netwatch-server"]

Makefile

@@ -1,10 +1,8 @@
-.PHONY: bootstrap setup dev test lint fmt fmt-check check frontend-check \
+.PHONY: bootstrap setup dev test lint fmt fmt-check check docker hooks
-	frontend-viewport-test docker hooks
 
 # Standard targets are thin shims; the implementations live in script/
 # per the scripts-to-rule-them-all pattern (see the Entrypoints section
-# of README.md). test, lint, fmt, fmt-check and check cover the whole
+# of README.md).
-# repo: the frontend here and the Go backend in backend/.
 
 bootstrap:
 	@script/bootstrap
@@ -30,17 +28,6 @@ fmt-check:
 check:
 	@script/check
 
-# The frontend half of check, for Dockerfile's node build stage, which
-# has neither Go nor Docker. Use check everywhere else.
-frontend-check:
-	@script/frontend-check
-
-# Responsive-layout verification in a containerised browser. Kept out of
-# check: it needs Docker and takes minutes, where make test has to stay
-# under 20 seconds.
-frontend-viewport-test:
-	@script/frontend-viewport-test
-
 docker:
 	@script/docker
 

README.md

@@ -23,62 +23,29 @@ docker build -t netwatch .
 docker run -p 8080:8080 netwatch
 ```
 
-`yarn dev` proxies `/api` to `http://127.0.0.1:8080`, so a locally running
-`netwatch-server` (see `backend/`) receives the reports the page posts.
-
 ## Entrypoints
 
 This repository adheres to the
 [Scripts to Rule Them All](https://github.com/github/scripts-to-rule-them-all)
 standard: normalized scripts in `script/` are the entrypoints for the
-development workflow, and the Makefile targets are thin shims that call them.
+development workflow, and the Makefile targets are thin shims that call them. We
-The Go backend in `backend/` has its own `script/` directory and shim Makefile
+provide:
-(see [backend/README.md](backend/README.md)). The root scripts cover both
-halves, so the root `make check` fails if either one is broken. We provide:
 
 - `script/bootstrap` — install all dependencies (pinned node via nvm if needed,
-  yarn via corepack, `yarn install --frozen-lockfile`, the pinned Go unless one
+  yarn via corepack, `yarn install --frozen-lockfile`)
-  at least as new as `backend/go.mod` asks for is installed, and the Go
-  modules), linking what it installs itself into `~/.local/bin`, which has to be
-  on `PATH`. It installs no Go linter and not Docker: `make lint` runs the
-  linter in Docker
 - `script/setup` — make a fresh clone ready for development: bootstrap plus the
   git pre-commit hook
 - `script/projectname` — print the project name (used for the Docker image tag)
-- `script/test` — run `script/frontend-test`, then the backend's Go tests, both
+- `script/test` — run the production build as the test (no unit tests yet)
-  within one 30-second timeout
+- `script/lint` — run prettier in check mode
-- `script/lint` — run `script/frontend-lint`, then golangci-lint in Docker, by
+- `script/fmt` — format all files (writes)
-  building the lint stage of `Dockerfile` without the cache
+- `script/fmt-check` — check formatting (read-only)
-- `script/fmt` — format all files (writes): prettier, then gofmt over `backend/`
-- `script/fmt-check` — check formatting (read-only): prettier, then gofmt
 - `script/check` — run test, lint, and fmt-check
-- `script/frontend-test` — run the production build as the frontend's test (no
+- `script/docker` — build the Docker image tagged via `script/projectname`
-  unit tests yet)
+- `script/cibuild` — CI entrypoint: plain `docker build .`
-- `script/frontend-lint` — run prettier in check mode
-- `script/frontend-fmt` — format everything prettier understands (writes)
-- `script/frontend-fmt-check` — check prettier formatting (read-only)
-- `script/frontend-check` — the frontend half of `script/check`, for
-  `Dockerfile`, whose node build stage has neither Go nor Docker
-- `script/frontend-viewport-test` — responsive-layout verification of the built
-  frontend in a containerised headless Chrome (see
-  [test/viewport/README.md](test/viewport/README.md)). Not part of
-  `script/check`: it needs Docker and takes minutes.
-- `script/docker` — build the image from `Dockerfile` without the build cache,
-  tagged `netwatch` via `script/projectname`
-- `script/cibuild` — CI entrypoint: builds the image
 - `script/precommit` — run by the git pre-commit hook; runs `script/check`
 - `script/install-precommit` — install the git pre-commit hook
 
-## Responsive layout
-
-The narrow-viewport layout lives in the `max-width: 768px` media block in
-`src/styles.css`. It is verified automatically by `make frontend-viewport-test`,
-which drives a digest-pinned headless Chrome against the built `dist/` and
-asserts on computed layout at widths derived from that CSS — one pixel either
-side of every breakpoint it declares, plus a 320px floor, a desktop baseline and
-two landscape sizes. See [test/viewport/README.md](test/viewport/README.md) for
-what it covers and what it genuinely cannot.
-
 ## Rationale
 
 When debugging network issues, it's useful to have a persistent at-a-glance view
@@ -104,18 +71,6 @@ code lives in `src/main.js` with a class-based architecture:
 - **`tick()`**: Main loop — measures all hosts in parallel via `Promise.all`,
   pushes samples, redraws UI. When paused, pushes blank markers (no probes, no
   false outage)
-- **`Reporter`**: Posts collected samples to the backend
-
-### Reporting
-
-Every `reportInterval` (default 60s) the page POSTs a JSON report to the
-same-origin path `/api/v1/reports`: a random per-browser `clientId` kept in
-`localStorage`, `geo` sent as null, and each host's unreported, non-paused
-samples (timestamp, latency, error). A per-host high-water mark makes every
-report a delta, so only new samples are sent; the mark advances only on a
-delivered report, and while paused nothing is sent. Delivery failure is quiet —
-one debug-log line per outage, retried at the next interval, never blocking
-probing. The report-building step is a pure function of host state.
 
 ### Monitoring targets
 
@@ -170,6 +125,9 @@ dist/
   false outage)
 - Clickable service URLs
 - Canvas-based sparkline rendering with devicePixelRatio scaling
+- Mobile detection: viewports narrower than 768px show a friendly "not yet
+  available on mobile" message instead of the monitoring UI (no polling or
+  network requests on mobile)
 - Zero runtime dependencies: all resources bundled into build artifacts
 
 ## Deployment
@@ -178,21 +136,13 @@ After running `yarn build`, deploy the contents of the `dist/` directory to any
 static file host (S3, GCS, Cloudflare Pages, Vercel, Netlify, GitHub Pages) or
 use the Docker image behind a reverse proxy.
 
-The Docker image, built from `Dockerfile`, is the whole service in one
+The Docker image:
-container: nginx serves the built frontend and passes `/api/` and
-`/.well-known/healthcheck` to the Go backend, `netwatch-server`, which listens
-only inside the container, on `127.0.0.1:8081`. The image:
 
 - Listens on port 8080 by default (override with `PORT` env var)
 - Trusts `X-Forwarded-For` from RFC1918 reverse proxies (10/8, 172.16/12,
   192.168/16)
 - Sends access logs to stdout
 - Caches static assets with immutable headers
-- Stores reports in `DATA_DIR`, `/data/reports` by default, on the `/data`
-  volume. The backend runs as user `netwatch` (uid 1000), so a directory
-  bind-mounted at `/data` must be writable by uid 1000
-- Writes buffered reports to disk on `docker stop`, and exits non-zero if nginx
-  or the backend exits on its own, so the platform restarts it
 
 ## Browser Compatibility
 
@@ -201,6 +151,8 @@ properties.
 
 ## Limitations
 
+- **Mobile**: Viewports below 768px wide show a static "not yet available"
+  message. The full monitoring UI requires a desktop-width browser.
 - **CORS**: Some hosts may block cross-origin HEAD requests. The app uses
   `no-cors` mode which allows the request but provides opaque responses. Latency
   is still measurable based on request timing.

TODO.md

@@ -10,126 +10,23 @@
 
 # Status
 
-pre-1.0. No git tags. `feat/reportbuf-storage` is merged; the backend, the CI
+pre-1.0. No git tags. Backend work in flight on feat/reportbuf-storage (dirty:
-workflow, and the backend repo standard files are all on `main`. Frontend and
+src/main.js). Frontend is functional; backend is new and unmerged.
-backend are both functional. Working toward the 1.0.0 milestone by closing the
-remaining repo-compliance issues on the tracker.
 
 # Next Step
 
-Confirm the `.gitea/workflows/check.yml` run is green (main always green
+Land feat/reportbuf-storage: finish the in-progress src/main.js change, get make
-policy). The workflow file is already on `main`; what is unverified is that its
+check green, and merge the branch to main. The branch adds the backend (buffered
-latest run passes.
+zstd-compressed report storage), the CI workflow, and backend repo standard
+files, so merging it also closes most compliance gaps.
 
 # Completed Steps
 
-- 2026-09-29: report file names can no longer collide (issue #61): each is
-  `reports-<timestamp>-<number>.jsonl.zst`, where the number counts the files
-  written since the server started, so two flushes in the same millisecond, such
-  as a flush for size and the final flush at shutdown, each get a file of their
-  own instead of the second one failing
-- 2026-09-29: bounded the report endpoint (issue #20): `POST /api/v1/reports`
-  still needs no credentials, but each client address, as resolved through
-  `TRUSTED_PROXIES`, may send `REPORTS_PER_MINUTE` (default 60) reports a
-  minute, counted by `go-chi/httprate`, and past that gets 429 with
-  `Retry-After`; the report files in `DATA_DIR`, counted from start with those
-  already there, may total at most `DATA_DIR_MAX_BYTES` (default 1 GiB), past
-  which reports get 507; and the wildcard CORS is gone: no CORS headers unless
-  `CORS_ALLOWED_ORIGINS` lists origins, and an entry that is not a plain
-  `scheme://host[:port]` origin, `*` included, stops the server from starting.
-  Deleting report files frees room only at the next start; pruning is issue #54
-- 2026-09-28: one container image (issue #52): the root `Dockerfile` builds the
-  only image, and `Dockerfile.backend` is gone. nginx serves the frontend on
-  port 8080 and proxies `/api/` and `/.well-known/healthcheck` to the backend,
-  which listens on `127.0.0.1:8081` in the same container; the new
-  `BIND_ADDRESS` setting sets its listen address. `bin/entrypoint.sh` starts
-  both, passes TERM and INT on to both, and exits non-zero when either exits on
-  its own. The backend runs as user `netwatch` and stores reports on the `/data`
-  volume. `script/docker` is the org model again
-- 2026-09-28: unified the gate (issue #16): the root `make check` covers the Go
-  backend as well as the frontend, and the pre-commit hook with it; the backend
-  moved onto scripts-to-rule-them-all (`backend/script/*`, `backend/Makefile` as
-  shims, its duplicate hook installer removed); `script/cibuild` builds both
-  images and is the workflow's only build step. The root `make lint` runs
-  golangci-lint only in Docker, by building the lint stage of
-  `Dockerfile.backend` without the cache. `script/bootstrap` installs the pinned
-  Go unless the installed one is at least what `backend/go.mod` asks for, links
-  what it installs into `~/.local/bin` without replacing anything it did not
-  create, and installs no linter. Root `make test` runs both halves within one
-  30-second timeout. When `VERSION` is unset or empty, the backend binary's
-  version falls back to `git describe` inside a git checkout, then to `dev`
-- 2026-09-28: frontend reporting client (issue #53): a `Reporter` class posts
-  collected samples to `/api/v1/reports` every `reportInterval` (default 60s) as
-  a per-host delta, with the report-building step a pure exported function of
-  host state; a per-host mark advances only on a delivered POST; at most one
-  report POST is pending at a time and it is abandoned after half the interval,
-  so a slow POST never overlaps the next report and a mark never moves
-  backwards; the samples of an abandoned POST are sent again at the next
-  interval, so a backend that stored them but answered late receives them twice;
-  the per-browser client id works in insecure (plain-HTTP) contexts;
-  `vite.config.js` proxies `/api` to the local backend for `yarn dev`
-- 2026-09-28: report ingest correctness (issue #23): a storage failure now
-  returns 500 instead of a false `ok`; oversize bodies return 413 (distinguished
-  from malformed JSON, which stays 400); a `MaxBodyBytes` middleware caps every
-  route, not just the report route; the raw attacker-controlled `geo` blob is no
-  longer logged (only its length), and `client_id`, `timestamp` and decode error
-  text are length-bounded before logging; a `decodeJSON` handler helper was
-  added; panic recovery now routes the stack through slog instead of chi's
-  plain-text stderr; and writing a report file now returns its error, so a
-  failed final flush on shutdown makes the process exit non-zero instead of
-  losing the buffered reports silently
-- 2026-09-21: shutdown lifecycle correctness. The process now shuts down through
-  fx instead of `os.Exit`, so every component's `OnStop` runs and buffered
-  reports are flushed to disk on `SIGTERM` — previously a full flush window of
-  telemetry was silently lost on every restart. The `http.Server` is now built
-  before its serving goroutine starts, so shutdown can no longer race or
-  nil-deref it; a listen failure exits non-zero via `fx.Shutdowner`; `reportbuf`
-  `OnStop` is idempotent; and `writeTimeout` now exceeds the chi per-request
-  budget so that budget is actually reachable. Dead `startupTime`, `exitCode`,
-  and `cancelFunc` fields were removed
-- 2026-09-21: backend HTTP hardening (issue #19): added `ReadHeaderTimeout` and
-  `IdleTimeout` to the server, a `SecurityHeaders` middleware (HSTS, tight CSP,
-  frame/sniff/referrer/permissions headers) registered before CORS, and
-  trusted-proxy client IP resolution honouring `X-Forwarded-For` / `X-Real-IP`
-  only from a `TRUSTED_PROXIES` allowlist (loopback plus RFC1918 by default)
-- 2026-08-10: adopted the org-standard `backend/.golangci.yml` verbatim and
-  moved the pinned golangci-lint from v2.7.2 to v2.12.2 (the `lint` stage of
-  `Dockerfile.backend` now pins the `golangci/golangci-lint:v2.12.2` image by
-  digest); the previous config declared `version: "2"` but used v1 schema keys,
-  so every threshold in it was inert and its green result was meaningless.
-  `backend/Makefile`'s `lint` target now asserts the config's sha256 against the
-  canonical file first, so drift from the org standard fails the build instead
-  of silently degrading to defaults
-- 2026-08-10: every interactive control now meets the 44x44 CSS px minimum tap
-  target (`.pin-btn`, `#interval-select`, the debug-log label and, on narrow
-  viewports, `#pause-btn`). The pin button's hit area grows via matching
-  negative margins, so its layout footprint and row density are unchanged
-- 2026-08-10: per-host status line wraps below the 768px breakpoint instead of
-  forcing horizontal page scroll at 320px
-- 2026-08-09: `Dockerfile.backend` reworked to the mandated Go multistage
-  lint-stage pattern: separate `lint` stage on the hash-pinned
-  `golangci/golangci-lint` image, `COPY --from=lint` stage dependency,
-  `CGO_ENABLED=0` static build driven by `ARG VERSION`, and no more `COPY .git`
-- 2026-08-09: dotfile compliance — lifted `backend/.editorconfig` to the repo
-  root so `root = true` covers the frontend too, and replaced `.gitignore` with
-  the org model (OS, editor, node, and environment/secrets sections) plus this
-  repo's `dist/` and `*.log`. `.env`, `.env.*`, `*.pem`, and `*.key` are now
-  ignored repo-wide, not just under `backend/`. Excluding `.git` from
-  `.dockerignore` stays deferred: both images read git metadata at build time
-  (`COPY .git` in `Dockerfile.backend`, `git rev-parse` in `vite.config.js`)
-- 2026-08-09: automated responsive-layout harness
-  (`make frontend-viewport-test`): digest-pinned headless Chrome driven over CDP
-  against the built `dist/`, viewport widths derived from the breakpoints in
-  `src/styles.css` ([#13](https://git.eeqj.de/sneak/netwatch/issues/13)). Every
-  check carries a presence guard so none of them can pass against a page it is
-  not actually measuring. Found two real layout defects, filed as
-  [#42](https://git.eeqj.de/sneak/netwatch/issues/42) and
-  [#43](https://git.eeqj.de/sneak/netwatch/issues/43)
 - 2026-07-07 Adopted scripts-to-rule-them-all: `script/` entrypoints, Makefile
   shims, README Entrypoints section
 - 2026-02-27: backend with buffered zstd-compressed report storage; CI workflow
   and backend repo standard files; backend Dockerfile fixed (Go 1.25,
-  golangci-lint) and moved to repo root (feat/reportbuf-storage)
+  golangci-lint) and moved to repo root (feat/reportbuf-storage, unmerged)
 - 2026-02-26: host row layout redesigned with CSS grid; overflow and spacing
   fixes; nginx config extracted; port hardcoded to 8080
 - 2026-02-26: debug log panel, median stats, recovery probe, Docker build fix,
@@ -142,18 +39,9 @@ latest run passes.
 
 # Future Steps
 
-- Wire `script/frontend-viewport-test` into CI as its own step (deliberately not
-  part of `make check` today; the decision has real CI-runtime cost and is
-  tracked separately)
 - Compliance top-up as one small commit: add .editorconfig and add the hooks
   target to the Makefile
 - After merge, confirm .gitea/workflows/check.yml is on main and CI is green
   (main always green policy)
 - Decide what to do with untracked resume.sh: commit it, gitignore it, or delete
   it
-- Upstream fix needed in `sneak/prompts`: the org-standard `.golangci.yml`
-  enables `gomodguard`, which golangci-lint v2.12.2 reports as deprecated since
-  v2.12.0 and replaced by `gomodguard_v2`, so every backend lint run prints a
-  deprecation warning. The file is standardized and must never be edited in this
-  repo, so nothing can be done here beyond tracking it — tracked at
-  <https://git.eeqj.de/sneak/netwatch/issues/41>

backend/.golangci.yml

@@ -1,9 +1,5 @@
 version: "2"
 
-# Config schema uses the golangci-lint v2 layout (settings live under
-# linters.settings, not top-level linters-settings) so that the
-# thresholds below are actually applied by golangci-lint >= v2.
-
 run:
   timeout: 5m
   modules-download-mode: readonly
@@ -18,7 +14,8 @@ linters:
     - wsl              # Deprecated, replaced by wsl_v5
     - wrapcheck        # Too verbose for internal packages
     - varnamelen       # Short names like db, id are idiomatic Go
-  settings:
+
+linters-settings:
   lll:
     line-length: 88
   funlen:
@@ -30,5 +27,6 @@ linters:
     threshold: 100
 
 issues:
+  exclude-use-default: false
   max-issues-per-linter: 0
   max-same-issues: 0

backend/Makefile

@@ -1,30 +1,53 @@
-# Thin shims; the implementations live in backend/script/ (see the
+UNAME_S := $(shell uname -s)
-# Entrypoints section of README.md). There is no check, hooks or docker
+VERSION := $(shell git describe --always --dirty)
-# target here: the root Makefile's check covers this directory, its
+BUILDARCH := $(shell uname -m)
-# hooks target installs the repo's only pre-commit hook, and its docker
+BINARY := netwatch-server
-# target builds the one image, which contains this backend.
 
-.PHONY: all build test lint fmt fmt-check run clean
+GOLDFLAGS += -X main.Version=$(VERSION)
+GOLDFLAGS += -X main.Buildarch=$(BUILDARCH)
+
+ifeq ($(UNAME_S),Darwin)
+	GOFLAGS := -ldflags "$(GOLDFLAGS)"
+else
+	GOFLAGS = -ldflags "-linkmode external -extldflags -static $(GOLDFLAGS)"
+endif
+
+.PHONY: all build test lint fmt fmt-check check docker hooks run clean
 
 all: build
 
-build:
+build: ./$(BINARY)
-	@script/build
+
+./$(BINARY): $(shell find . -name '*.go' -type f) go.mod go.sum
+	go build -o $@ $(GOFLAGS) ./cmd/netwatch-server/
 
 test:
-	@script/test
+	timeout 30 go test ./...
 
 lint:
-	@script/lint
+	golangci-lint run ./...
 
 fmt:
-	@script/fmt
+	go fmt ./...
 
 fmt-check:
-	@script/fmt-check
+	@test -z "$$(gofmt -l .)" || \
+		(echo "Files not formatted:"; gofmt -l .; exit 1)
 
-run:
+check: test lint fmt-check
-	@script/run
+
+docker:
+	timeout 300 docker build -t netwatch-server -f ../Dockerfile.backend ..
+
+hooks:
+	@printf '#!/bin/sh\ncd backend && make check\n' > \
+		$$(git rev-parse --show-toplevel)/.git/hooks/pre-commit
+	@chmod +x \
+		$$(git rev-parse --show-toplevel)/.git/hooks/pre-commit
+	@echo "Pre-commit hook installed"
+
+run: build
+	./$(BINARY)
 
 clean:
-	@script/clean
+	rm -f ./$(BINARY)

backend/README.md

@@ -4,51 +4,18 @@ SPA and persists them as zstd-compressed JSONL files on disk.
 
 ## Getting Started
 
-From this directory:
-
 ```bash
 # Build and run locally
 make run
-```
 
-From the repo root, whose `Dockerfile` builds the one image that ships this
+# Run tests, lint, and format check
-backend behind nginx (see [Container image](#container-image)):
-
-```bash
-# Run tests, lint, and format check over the frontend and this backend
 make check
 
-# Build the image: nginx, the frontend and this backend
+# Docker
-make docker
+docker build -t netwatch-server .
-docker run -p 8080:8080 netwatch
+docker run -p 8080:8080 netwatch-server
 ```
 
-## Entrypoints
-
-This directory follows the same
-[Scripts to Rule Them All](https://github.com/github/scripts-to-rule-them-all)
-pattern as the repo root: the targets in `backend/Makefile` are thin shims over
-`backend/script/`. The root `Dockerfile` runs them, and the root scripts call
-`test`, `fmt` and `fmt-check`:
-
-- `script/build` — compile the static `netwatch-server` binary with its version
-  and architecture stamped in. The version is `VERSION` from the environment;
-  when that is unset or empty, it falls back to `git describe` inside a git
-  checkout, then to `dev`
-- `script/test` — run the Go tests under a 30-second timeout
-- `script/lint` — check `.golangci.yml` against its pinned sha256, then run
-  golangci-lint. It runs inside the golangci-lint image of the lint stage of
-  the root `Dockerfile`; from a checkout, run `make lint` at the repo root,
-  which builds that stage
-- `script/fmt` — format the Go sources (writes)
-- `script/fmt-check` — check Go formatting (read-only)
-- `script/run` — build and run the server locally
-- `script/clean` — remove build artifacts
-
-There is no `check`, `hooks` or `docker` target here: the root `make check`
-covers this directory, the root `make hooks` installs the repo's only pre-commit
-hook, and the root `make docker` builds the image that contains this backend.
-
 ## Rationale
 
 The NetWatch frontend collects latency measurements from the browser but has no
@@ -76,73 +43,16 @@ Internal packages in `internal/` follow standard Go project layout:
 ### Configuration
 
 | Variable   | Default            | Description                       |
-| ---------------------- | -------------------- | -------------------------------------------------------------------------------------------------------- |
+| ---------- | ------------------ | --------------------------------- |
-| `BIND_ADDRESS`         | empty                | IP address to listen on; empty listens on every interface                                                |
 | `PORT`     | `8080`             | HTTP listen port                  |
 | `DATA_DIR` | `./data/reports`   | Directory for compressed reports  |
-| `DATA_DIR_MAX_BYTES`   | `1073741824` (1 GiB) | Largest total size of the report files in `DATA_DIR`; see [Report limits](#report-limits)                |
 | `DEBUG`    | `false`            | Enable debug logging              |
-| `TRUSTED_PROXIES`      | loopback + RFC1918   | Comma-separated CIDRs whose `X-Forwarded-For` / `X-Real-IP` headers are trusted for client IP resolution |
-| `REPORTS_PER_MINUTE`   | `60`                 | Reports each client address may send a minute; see [Report limits](#report-limits)                       |
-| `CORS_ALLOWED_ORIGINS` | empty                | Comma-separated origins whose pages may call the API; see [CORS](#cors)                                  |
-
-`TRUSTED_PROXIES` defaults to `127.0.0.1/32,::1/128,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16`.
-The loopback entries cover the reverse proxy that shares the container; the
-RFC1918 ranges match `nginx.conf`. A request whose direct peer is outside this
-set has its forwarded headers ignored, and the direct peer is logged instead.
-
-### Container image
-
-The root `Dockerfile` builds one image in which nginx listens on the public port
-8080, serves the frontend, and proxies `/api/` and `/.well-known/healthcheck` to
-this server. The image's entrypoint, `bin/entrypoint.sh`, starts the server as
-user `netwatch` (uid 1000) with `BIND_ADDRESS=127.0.0.1` and `PORT=8081`, so
-only nginx reaches it. `DATA_DIR` is `/data/reports`, on the `/data` volume,
-which `netwatch` owns.
 
 ### Report storage
 
-Reports are written as `reports-<timestamp>-<number>.jsonl.zst` files in
+Reports are written as `reports-<timestamp>.jsonl.zst` files in `DATA_DIR`.
-`DATA_DIR`. The timestamp is in UTC to the millisecond, so the names sort by
+Each file contains one JSON object per line, compressed with zstd. Files are
-time; the number counts the files the server has written since it started, so
+created with `O_EXCL` to prevent overwrites.
-two files written in the same millisecond still get different names. Each file
-contains one JSON object per line, compressed with zstd. Files are created with
-`O_EXCL` to prevent overwrites.
-
-### Report limits
-
-`POST /api/v1/reports` takes reports from anyone who can reach it, without
-credentials, so it is bounded instead. Both refusals below answer with the same
-`{"status":"error"}` body as any other error.
-
-- **Rate limit.** Each client address, resolved through `TRUSTED_PROXIES`, may
-  send `REPORTS_PER_MINUTE` reports a minute; past that it gets 429 with
-  `Retry-After: 60`. The minute slides: reports from the minute before still
-  count, fading out over the current one, so an address is sure never to be
-  refused only while it sends at most half of `REPORTS_PER_MINUTE` in any 60
-  seconds. The page sends one report a minute from each open tab, so the default
-  of 60 refuses nothing from up to 30 tabs behind one address, such as a
-  household or an office sharing it, however their reports bunch up. Report
-  responses also carry `X-RateLimit-Limit`, `X-RateLimit-Remaining` and
-  `X-RateLimit-Reset` headers.
-- **Size cap.** The report files in `DATA_DIR` may total at most
-  `DATA_DIR_MAX_BYTES`, counting the files already there at start. Reports
-  waiting in memory count at their uncompressed size until they are written, so
-  a report that would take the total past the cap is refused with 507, and
-  nothing of it is stored. Deleting report files frees room only at the next
-  start, when the files are counted again. The default of 1 GiB is small enough
-  for any host; set it to the space you can give `DATA_DIR`.
-
-### CORS
-
-The page calls the API from the origin it is served from, so by default the
-server sends no CORS headers, and browsers let no other origin's pages call it.
-To serve the page from elsewhere, list that origin in `CORS_ALLOWED_ORIGINS`
-(for example `https://netwatch.example.com`); pages from a listed origin may
-`GET` and `POST` with a `Content-Type` header. Each entry must be a plain
-origin, `scheme://host` with an optional `:port`, as browsers send it: no path,
-not even a trailing `/`, and no `*`. Any other entry stops the server from
-starting, with an error naming `CORS_ALLOWED_ORIGINS`.
 
 ## TODO
 

backend/go.mod

@@ -5,7 +5,6 @@ go 1.25.5
 require (
 	github.com/go-chi/chi/v5 v5.2.5
 	github.com/go-chi/cors v1.2.2
-	github.com/go-chi/httprate v0.16.0
 	github.com/joho/godotenv v1.5.1
 	github.com/klauspost/compress v1.18.4
 	github.com/spf13/viper v1.21.0
@@ -15,7 +14,6 @@ require (
 require (
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
@@ -23,11 +21,10 @@ require (
 	github.com/spf13/cast v1.10.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
-	github.com/zeebo/xxh3 v1.0.2 // indirect
 	go.uber.org/dig v1.19.0 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
 	go.uber.org/zap v1.26.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
 )

backend/go.sum

@@ -8,8 +8,6 @@ github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
 github.com/go-chi/chi/v5 v5.2.5/go.mod h1:X7Gx4mteadT3eDOMTsXzmI4/rwUpOwBHLpAfupzFJP0=
 github.com/go-chi/cors v1.2.2 h1:Jmey33TE+b+rB7fT8MUy1u0I4L+NARQlK6LhzKPSyQE=
 github.com/go-chi/cors v1.2.2/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
-github.com/go-chi/httprate v0.16.0 h1:8V5DH9j6pSK6UQoBsTpvMyFxycqaKEIToyPKzHJjUa8=
-github.com/go-chi/httprate v0.16.0/go.mod h1:A8lo+qRhk+s9LiuP5saS7XCGDXRXMcrueq0NfIuCa/I=
 github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
 github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
@@ -18,8 +16,6 @@ github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/klauspost/compress v1.18.4 h1:RPhnKRAQ4Fh8zU2FY/6ZFDwTVTxgJ/EMydqSTzE9a2c=
 github.com/klauspost/compress v1.18.4/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
-github.com/klauspost/cpuid/v2 v2.2.10 h1:tBs3QSyvjDyFTq3uoc/9xFpCuOsJQFNPiAhYdw2skhE=
-github.com/klauspost/cpuid/v2 v2.2.10/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
@@ -46,10 +42,6 @@ github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
 github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
-github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
-github.com/zeebo/assert v1.3.0/go.mod h1:Pq9JiuJQpG8JLJdtkwrJESF0Foym2/D9XMU5ciN/wJ0=
-github.com/zeebo/xxh3 v1.0.2 h1:xZmwmqxHZA8AI603jOQ0tMqmBr9lPeFwGg6d+xy9DC0=
-github.com/zeebo/xxh3 v1.0.2/go.mod h1:5NWz9Sef7zIDm2JHfFlcQvNekmcEl9ekUZQQKCYaDcA=
 go.uber.org/dig v1.19.0 h1:BACLhebsYdpQ7IROQ1AGPjrXcP5dF80U3gKoFzbaq/4=
 go.uber.org/dig v1.19.0/go.mod h1:Us0rSJiThwCv2GteUN0Q7OKvU7n5J4dxZ9JKUXozFdE=
 go.uber.org/fx v1.24.0 h1:wE8mruvpg2kiiL1Vqd0CC+tr0/24XIB10Iwp2lLWzkg=
@@ -62,8 +54,8 @@ go.uber.org/zap v1.26.0 h1:sI7k6L95XOKS281NhVKOFCUNIvv9e0w4BF8N3u+tCRo=
 go.uber.org/zap v1.26.0/go.mod h1:dtElttAiwGvoJ/vj4IwHBS/gXsEu/pZ50mUIRWuG0so=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
 golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

backend/internal/config/config.go

@@ -4,10 +4,7 @@ package config
 
 import (
 	"errors"
-	"fmt"
 	"log/slog"
-	"net/url"
-	"strings"
 
 	"sneak.berlin/go/netwatch/internal/globals"
 	"sneak.berlin/go/netwatch/internal/logger"
@@ -17,28 +14,6 @@ import (
 	"go.uber.org/fx"
 )
 
-// defaultTrustedProxies lists the networks whose forwarded
-// headers are honoured by default. It covers the RFC1918
-// ranges (to match nginx.conf) plus IPv4 and IPv6 loopback,
-// because the reverse proxy shares the container and reaches
-// the backend over loopback.
-const defaultTrustedProxies = "127.0.0.1/32,::1/128," +
-	"10.0.0.0/8,172.16.0.0/12,192.168.0.0/16"
-
-// Default limits on stored reports; backend/README.md gives the
-// reasons for these values.
-const (
-	defaultReportsPerMinute = 60
-	defaultDataDirMaxBytes  = 1 << 30 // 1 GiB
-)
-
-var (
-	errNotPositive = errors.New("must be a positive whole number")
-	errNotOrigin   = errors.New(
-		"must be an origin, scheme://host with an optional port",
-	)
-)
-
 // Params defines the dependencies for Config.
 type Params struct {
 	fx.In
@@ -49,17 +24,12 @@ type Params struct {
 
 // Config holds the resolved application configuration.
 type Config struct {
-	BindAddress        string
-	CORSAllowedOrigins []string
 	DataDir         string
-	DataDirMaxBytes    int64
 	Debug           bool
 	MetricsPassword string
 	MetricsUsername string
 	Port            int
-	ReportsPerMinute   int
 	SentryDSN       string
-	TrustedProxies     []string
 	log             *slog.Logger
 	params          *Params
 }
@@ -80,19 +50,12 @@ func New(
 
 	viper.AutomaticEnv()
 
-	// An empty CORS_ALLOWED_ORIGINS allows no other origin.
-	viper.SetDefault("CORS_ALLOWED_ORIGINS", "")
 	viper.SetDefault("DATA_DIR", "./data/reports")
-	viper.SetDefault("DATA_DIR_MAX_BYTES", defaultDataDirMaxBytes)
 	viper.SetDefault("DEBUG", "false")
-	// An empty BIND_ADDRESS listens on every interface.
-	viper.SetDefault("BIND_ADDRESS", "")
 	viper.SetDefault("PORT", "8080")
-	viper.SetDefault("REPORTS_PER_MINUTE", defaultReportsPerMinute)
 	viper.SetDefault("SENTRY_DSN", "")
 	viper.SetDefault("METRICS_USERNAME", "")
 	viper.SetDefault("METRICS_PASSWORD", "")
-	viper.SetDefault("TRUSTED_PROXIES", defaultTrustedProxies)
 
 	err := viper.ReadInConfig()
 	if err != nil {
@@ -104,38 +67,16 @@ func New(
 	}
 
 	s := &Config{
-		BindAddress:        viper.GetString("BIND_ADDRESS"),
-		CORSAllowedOrigins: splitList(viper.GetString("CORS_ALLOWED_ORIGINS")),
 		DataDir:         viper.GetString("DATA_DIR"),
-		DataDirMaxBytes:    viper.GetInt64("DATA_DIR_MAX_BYTES"),
 		Debug:           viper.GetBool("DEBUG"),
 		MetricsPassword: viper.GetString("METRICS_PASSWORD"),
 		MetricsUsername: viper.GetString("METRICS_USERNAME"),
 		Port:            viper.GetInt("PORT"),
-		ReportsPerMinute:   viper.GetInt("REPORTS_PER_MINUTE"),
 		SentryDSN:       viper.GetString("SENTRY_DSN"),
-		TrustedProxies:     splitList(viper.GetString("TRUSTED_PROXIES")),
 		log:             log,
 		params:          &params,
 	}
 
-	// viper reads a value that is not a number as 0, so this also
-	// catches a mistyped setting.
-	if s.ReportsPerMinute <= 0 {
-		return nil, fmt.Errorf("REPORTS_PER_MINUTE %q: %w",
-			viper.GetString("REPORTS_PER_MINUTE"), errNotPositive)
-	}
-
-	if s.DataDirMaxBytes <= 0 {
-		return nil, fmt.Errorf("DATA_DIR_MAX_BYTES %q: %w",
-			viper.GetString("DATA_DIR_MAX_BYTES"), errNotPositive)
-	}
-
-	err = checkOrigins(s.CORSAllowedOrigins)
-	if err != nil {
-		return nil, err
-	}
-
 	if s.Debug {
 		params.Logger.EnableDebugLogging()
 		s.log = params.Logger.Get()
@@ -143,38 +84,3 @@ func New(
 
 	return s, nil
 }
-
-// checkOrigins fails on the first CORS_ALLOWED_ORIGINS entry that is
-// not a plain origin, scheme://host with an optional port, as browsers
-// send it; anything more, such as a trailing "/", would match no page.
-// go-chi/cors reads a "*" anywhere in an entry as a wildcard, so no
-// entry may contain one.
-func checkOrigins(origins []string) error {
-	for _, origin := range origins {
-		u, err := url.Parse(origin)
-		if err != nil || u.Scheme == "" || u.Host == "" ||
-			strings.Contains(origin, "*") ||
-			origin != u.Scheme+"://"+u.Host {
-			return fmt.Errorf("CORS_ALLOWED_ORIGINS %q: %w",
-				origin, errNotOrigin)
-		}
-	}
-
-	return nil
-}
-
-// splitList turns a comma-separated setting into a trimmed
-// slice, dropping empty entries.
-func splitList(raw string) []string {
-	parts := strings.Split(raw, ",")
-
-	out := make([]string, 0, len(parts))
-	for _, p := range parts {
-		p = strings.TrimSpace(p)
-		if p != "" {
-			out = append(out, p)
-		}
-	}
-
-	return out
-}

backend/internal/config/config_test.go

@@ -1,64 +0,0 @@
-package config_test
-
-import (
-	"strings"
-	"testing"
-
-	"sneak.berlin/go/netwatch/internal/config"
-	"sneak.berlin/go/netwatch/internal/globals"
-	"sneak.berlin/go/netwatch/internal/logger"
-
-	"go.uber.org/fx"
-)
-
-// requireConfigError builds the config as main does and fails the
-// test unless that fails with an error naming setting. It uses
-// fx.New, because fxtest.New fails the test itself on an error.
-func requireConfigError(t *testing.T, setting string) {
-	t.Helper()
-
-	app := fx.New(
-		fx.NopLogger,
-		fx.Provide(globals.New, logger.New, config.New),
-		fx.Invoke(func(*config.Config) {}),
-	)
-
-	err := app.Err()
-	if err == nil || !strings.Contains(err.Error(), setting) {
-		t.Fatalf("config error = %v, want one naming %s", err, setting)
-	}
-}
-
-// TestReportsPerMinuteMustBePositive: unchecked, zero would panic
-// when the routes are built, and a negative rate would lift the
-// limit.
-func TestReportsPerMinuteMustBePositive(t *testing.T) {
-	t.Setenv("REPORTS_PER_MINUTE", "0")
-
-	requireConfigError(t, "REPORTS_PER_MINUTE")
-}
-
-// TestDataDirMaxBytesMustBeANumber: viper reads a value that is not
-// a number, such as "1GB", as 0, which would refuse every report.
-func TestDataDirMaxBytesMustBeANumber(t *testing.T) {
-	t.Setenv("DATA_DIR_MAX_BYTES", "1GB")
-
-	requireConfigError(t, "DATA_DIR_MAX_BYTES")
-}
-
-// TestCORSAllowedOriginsMustBeOrigins: "*" would let every origin in,
-// and an entry that is not a plain origin would match no page.
-func TestCORSAllowedOriginsMustBeOrigins(t *testing.T) {
-	for _, entry := range []string{
-		"*",
-		"https://*.netwatch.example",
-		"netwatch.example",
-		"https://netwatch.example/",
-	} {
-		t.Run(entry, func(t *testing.T) {
-			t.Setenv("CORS_ALLOWED_ORIGINS", entry)
-
-			requireConfigError(t, "CORS_ALLOWED_ORIGINS")
-		})
-	}
-}

backend/internal/handlers/export_test.go

@@ -1,13 +0,0 @@
-package handlers
-
-import "log/slog"
-
-// MaxLoggedFieldBytes exposes the log bound to the external tests.
-const MaxLoggedFieldBytes = maxLoggedFieldBytes
-
-// NewForTest builds a Handlers around a report sink and logger,
-// bypassing the fx graph so handler behaviour (including the
-// storage failure path) is exercisable in unit tests.
-func NewForTest(buf reportAppender, log *slog.Logger) *Handlers {
-	return &Handlers{buf: buf, log: log}
-}

backend/internal/handlers/handlers.go

@@ -18,13 +18,6 @@ import (
 
 const jsonContentType = "application/json; charset=utf-8"
 
-// reportAppender is the subset of the report buffer the handlers
-// depend on. Defining it here keeps the storage failure path
-// exercisable with a stub in tests.
-type reportAppender interface {
-	Append(v any) error
-}
-
 // Params defines the dependencies for Handlers.
 type Params struct {
 	fx.In
@@ -37,7 +30,7 @@ type Params struct {
 
 // Handlers provides HTTP handler factories for all endpoints.
 type Handlers struct {
-	buf    reportAppender
+	buf    *reportbuf.Buffer
 	hc     *healthcheck.Healthcheck
 	log    *slog.Logger
 	params *Params
@@ -79,15 +72,3 @@ func (s *Handlers) respondJSON(
 		}
 	}
 }
-
-// decodeJSON decodes the request body into v. The body is
-// expected to already be bounded by the body-size middleware, so
-// a caller can distinguish an over-limit body from malformed
-// JSON by testing the returned error for *http.MaxBytesError.
-func (s *Handlers) decodeJSON(
-	_ http.ResponseWriter,
-	r *http.Request,
-	v any,
-) error {
-	return json.NewDecoder(r.Body).Decode(v)
-}

backend/internal/handlers/report.go

@@ -2,16 +2,10 @@ package handlers
 
 import (
 	"encoding/json"
-	"errors"
 	"net/http"
-
-	"sneak.berlin/go/netwatch/internal/reportbuf"
 )
 
-// maxLoggedFieldBytes bounds untrusted text (string fields,
+const maxReportBodyBytes = 1 << 20 // 1 MiB
-// decode error text) before it is logged, so a caller cannot
-// inflate log volume with an oversized value.
-const maxLoggedFieldBytes = 128
 
 type reportSample struct {
 	T       int64   `json:"t"`
@@ -41,94 +35,48 @@ func (s *Handlers) HandleReport() http.HandlerFunc {
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
+		r.Body = http.MaxBytesReader(
+			w, r.Body, maxReportBodyBytes,
+		)
+
 		var rpt report
 
-		err := s.decodeJSON(w, r, &rpt)
+		err := json.NewDecoder(r.Body).Decode(&rpt)
 		if err != nil {
-			s.respondJSON(w, r,
-				&response{Status: "error"},
-				s.decodeErrorStatus(err),
-			)
-
-			return
-		}
-
-		s.logReportReceived(rpt)
-
-		err = s.buf.Append(rpt)
-		if err != nil {
-			s.respondJSON(w, r,
-				&response{Status: "error"},
-				s.appendErrorStatus(err),
-			)
-
-			return
-		}
-
-		s.respondJSON(w, r, &response{Status: "ok"}, http.StatusOK)
-	}
-}
-
-// decodeErrorStatus logs a report decode failure and returns the
-// status to send: 413 when the body exceeded the size limit,
-// otherwise 400 for malformed JSON.
-func (s *Handlers) decodeErrorStatus(err error) int {
-	var tooLarge *http.MaxBytesError
-	if errors.As(err, &tooLarge) {
-		s.log.Warn("report body too large", "limit_bytes", tooLarge.Limit)
-
-		return http.StatusRequestEntityTooLarge
-	}
-
-	// The decoder's error text can quote request bytes (a whole
-	// oversized number, for example), so it is bounded too.
 			s.log.Error("failed to decode report",
-		"error", boundedForLog(err.Error()),
+				"error", err,
+			)
+			s.respondJSON(w, r,
+				&response{Status: "error"},
+				http.StatusBadRequest,
 			)
 
-	return http.StatusBadRequest
+			return
-}
-
-// appendErrorStatus logs a failure to store a report and returns
-// the status to send: 507 when the report files are at their size
-// cap, otherwise 500.
-func (s *Handlers) appendErrorStatus(err error) int {
-	if errors.Is(err, reportbuf.ErrFull) {
-		s.log.Warn("report refused: report files at their size cap")
-
-		return http.StatusInsufficientStorage
 		}
 
-	s.log.Error("failed to buffer report", "error", err)
-
-	return http.StatusInternalServerError
-}
-
-// logReportReceived logs an accepted report. Untrusted fields are
-// bounded (client_id, timestamp) or reduced to a length
-// (geo_bytes) so the raw attacker-controlled body never reaches
-// the log.
-func (s *Handlers) logReportReceived(rpt report) {
 		totalSamples := 0
 		for _, h := range rpt.Hosts {
 			totalSamples += len(h.History)
 		}
 
 		s.log.Info("report received",
-		"client_id", boundedForLog(rpt.ClientID),
+			"client_id", rpt.ClientID,
-		"timestamp", boundedForLog(rpt.Timestamp),
+			"timestamp", rpt.Timestamp,
 			"host_count", len(rpt.Hosts),
 			"total_samples", totalSamples,
-		"geo_bytes", len(rpt.Geo),
+			"geo", string(rpt.Geo),
 		)
-}
 
-// boundedForLog truncates an untrusted string to a fixed byte
+		bufErr := s.buf.Append(rpt)
-// bound so an attacker-controlled field cannot dominate the log.
+		if bufErr != nil {
-func boundedForLog(s string) string {
+			s.log.Error("failed to buffer report",
-	if len(s) > maxLoggedFieldBytes {
+				"error", bufErr,
-		return s[:maxLoggedFieldBytes]
+			)
 		}
 
-	return s
+		s.respondJSON(w, r,
+			&response{Status: "ok"},
+			http.StatusOK,
+		)
+	}
 }

backend/internal/handlers/report_test.go

@@ -1,239 +0,0 @@
-package handlers_test
-
-import (
-	"bytes"
-	"encoding/json"
-	"errors"
-	"io"
-	"log/slog"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"sneak.berlin/go/netwatch/internal/handlers"
-	"sneak.berlin/go/netwatch/internal/middleware"
-	"sneak.berlin/go/netwatch/internal/reportbuf"
-)
-
-var errStorageFailed = errors.New("storage failed")
-
-// stubAppender drives the storage success/failure path without a
-// real buffer or disk.
-type stubAppender struct {
-	err error
-}
-
-func (s stubAppender) Append(any) error { return s.err }
-
-func newTestHandlers(buf stubAppender, out io.Writer) *handlers.Handlers {
-	return handlers.NewForTest(buf, slog.New(slog.NewJSONHandler(out, nil)))
-}
-
-func decodeStatus(t *testing.T, body []byte) string {
-	t.Helper()
-
-	var resp struct {
-		Status string `json:"status"`
-	}
-
-	err := json.Unmarshal(body, &resp)
-	if err != nil {
-		t.Fatalf("response body not JSON: %v (%q)", err, body)
-	}
-
-	return resp.Status
-}
-
-func TestHandleReportStorageFailureIsNon2xx(t *testing.T) {
-	t.Parallel()
-
-	h := newTestHandlers(stubAppender{err: errStorageFailed}, io.Discard)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{"clientId":"c1","hosts":[]}`),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	if rec.Code < 500 {
-		t.Fatalf("storage failure status = %d, want a 5xx", rec.Code)
-	}
-
-	if got := decodeStatus(t, rec.Body.Bytes()); got != "error" {
-		t.Fatalf("status field = %q, want %q", got, "error")
-	}
-}
-
-// TestHandleReportFullIs507 checks the answer when the report files
-// are at their size cap: 507 and the usual error body, which tells
-// the client nothing more.
-func TestHandleReportFullIs507(t *testing.T) {
-	t.Parallel()
-
-	h := newTestHandlers(stubAppender{err: reportbuf.ErrFull}, io.Discard)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{"clientId":"c1","hosts":[]}`),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusInsufficientStorage {
-		t.Fatalf("status = %d, want %d",
-			rec.Code, http.StatusInsufficientStorage)
-	}
-
-	if got := rec.Body.String(); got != "{\"status\":\"error\"}\n" {
-		t.Errorf("body = %q, want %q", got, "{\"status\":\"error\"}\n")
-	}
-}
-
-func TestHandleReportMalformedJSONIs400(t *testing.T) {
-	t.Parallel()
-
-	h := newTestHandlers(stubAppender{}, io.Discard)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{not json`),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusBadRequest {
-		t.Fatalf("malformed status = %d, want %d",
-			rec.Code, http.StatusBadRequest)
-	}
-}
-
-func TestHandleReportOversizeIs413(t *testing.T) {
-	t.Parallel()
-
-	const limit = 32
-
-	h := newTestHandlers(stubAppender{}, io.Discard)
-	handler := (&middleware.Middleware{}).MaxBodyBytes(limit)(
-		h.HandleReport(),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{"clientId":"`+strings.Repeat("x", 200)+`"}`),
-	)
-	// No declared length, so only the middleware's read cap can
-	// stop this body.
-	req.ContentLength = -1
-
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusRequestEntityTooLarge {
-		t.Fatalf("oversize status = %d, want %d",
-			rec.Code, http.StatusRequestEntityTooLarge)
-	}
-}
-
-func TestHandleReportDoesNotLogRawGeo(t *testing.T) {
-	t.Parallel()
-
-	const sentinel = "SENSITIVE-GEO-BLOB"
-
-	var logbuf bytes.Buffer
-
-	h := newTestHandlers(stubAppender{}, &logbuf)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(
-			`{"clientId":"c1","geo":{"raw":"`+sentinel+`"},"hosts":[]}`,
-		),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
-	}
-
-	if strings.Contains(logbuf.String(), sentinel) {
-		t.Fatal("raw geo bytes were written to the log")
-	}
-
-	if !strings.Contains(logbuf.String(), "geo_bytes") {
-		t.Fatal("expected a bounded geo_bytes field in the log")
-	}
-}
-
-func TestHandleReportLogsClientIDCutToBound(t *testing.T) {
-	t.Parallel()
-
-	long := strings.Repeat("c", 2*handlers.MaxLoggedFieldBytes)
-
-	var logbuf bytes.Buffer
-
-	h := newTestHandlers(stubAppender{}, &logbuf)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(
-			`{"clientId":"`+long+`","timestamp":"`+long+`","hosts":[]}`,
-		),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	var logged map[string]any
-
-	err := json.Unmarshal(logbuf.Bytes(), &logged)
-	if err != nil {
-		t.Fatalf("log line not JSON: %v (%q)", err, logbuf.String())
-	}
-
-	want := long[:handlers.MaxLoggedFieldBytes]
-
-	if logged["client_id"] != want {
-		t.Fatalf("logged client_id not cut to %d bytes: %q",
-			handlers.MaxLoggedFieldBytes, logged["client_id"])
-	}
-
-	if logged["timestamp"] != want {
-		t.Fatalf("logged timestamp not cut to %d bytes: %q",
-			handlers.MaxLoggedFieldBytes, logged["timestamp"])
-	}
-}
-
-func TestHandleReportDecodeErrorLogIsBounded(t *testing.T) {
-	t.Parallel()
-
-	// A number too large for its int64 field makes the decoder's
-	// error text quote the whole number.
-	huge := strings.Repeat("9", 2*handlers.MaxLoggedFieldBytes)
-
-	var logbuf bytes.Buffer
-
-	h := newTestHandlers(stubAppender{}, &logbuf)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{"hosts":[{"history":[{"t":`+huge+`}]}]}`),
-	)
-
-	h.HandleReport().ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusBadRequest {
-		t.Fatalf("status = %d, want %d", rec.Code, http.StatusBadRequest)
-	}
-
-	if strings.Contains(logbuf.String(), huge) {
-		t.Fatal("the whole oversized number was written to the log")
-	}
-}

backend/internal/middleware/export_test.go

@@ -1,35 +0,0 @@
-package middleware
-
-import (
-	"log/slog"
-	"net/http"
-	"net/netip"
-)
-
-// Test-only wrappers exposing unexported helpers to the
-// external middleware_test package.
-
-// NewWithLogger builds a Middleware around a logger for tests
-// that exercise the logging paths without the fx graph.
-func NewWithLogger(log *slog.Logger) *Middleware {
-	return &Middleware{log: log}
-}
-
-// NewWithTrustedProxies builds a Middleware that honours forwarded
-// headers from the given networks, for tests of the client address
-// paths without the fx graph.
-func NewWithTrustedProxies(trusted []netip.Prefix) *Middleware {
-	return &Middleware{trustedProxies: trusted}
-}
-
-func ClientIP(
-	remoteAddr string,
-	header http.Header,
-	trusted []netip.Prefix,
-) string {
-	return clientIP(remoteAddr, header, trusted)
-}
-
-func ParseTrustedProxies(cidrs []string) ([]netip.Prefix, error) {
-	return parseTrustedProxies(cidrs)
-}

backend/internal/middleware/middleware.go

@@ -3,15 +3,9 @@
 package middleware
 
 import (
-	"errors"
-	"fmt"
-	"io"
 	"log/slog"
 	"net"
 	"net/http"
-	"net/netip"
-	"runtime/debug"
-	"strings"
 	"time"
 
 	"sneak.berlin/go/netwatch/internal/config"
@@ -20,29 +14,11 @@ import (
 
 	"github.com/go-chi/chi/v5/middleware"
 	"github.com/go-chi/cors"
-	"github.com/go-chi/httprate"
 	"go.uber.org/fx"
 )
 
 const corsMaxAgeSec = 300
 
-// jsonErrorBody is the body written for errors raised inside
-// middleware, matching the {"status":"error"} shape the handlers
-// return so clients see one error contract across the API.
-const (
-	jsonContentType = "application/json; charset=utf-8"
-	jsonErrorBody   = "{\"status\":\"error\"}\n"
-)
-
-// Security header values. The backend is a JSON API with no
-// HTML surface, so the CSP forbids every resource type and
-// framing outright.
-const (
-	hstsValue              = "max-age=31536000; includeSubDomains"
-	cspValue               = "default-src 'none'; frame-ancestors 'none'"
-	permissionsPolicyValue = "camera=(), microphone=(), geolocation=()"
-)
-
 // Params defines the dependencies for Middleware.
 type Params struct {
 	fx.In
@@ -56,7 +32,6 @@ type Params struct {
 type Middleware struct {
 	log    *slog.Logger
 	params *Params
-	trustedProxies []netip.Prefix
 }
 
 // New creates a Middleware instance.
@@ -64,38 +39,13 @@ func New(
 	_ fx.Lifecycle,
 	params Params,
 ) (*Middleware, error) {
-	trusted, err := parseTrustedProxies(params.Config.TrustedProxies)
-	if err != nil {
-		return nil, err
-	}
-
 	s := new(Middleware)
 	s.params = &params
 	s.log = params.Logger.Get()
-	s.trustedProxies = trusted
 
 	return s, nil
 }
 
-// parseTrustedProxies converts CIDR strings into prefixes,
-// failing fast on any malformed entry.
-func parseTrustedProxies(cidrs []string) ([]netip.Prefix, error) {
-	prefixes := make([]netip.Prefix, 0, len(cidrs))
-
-	for _, cidr := range cidrs {
-		prefix, err := netip.ParsePrefix(cidr)
-		if err != nil {
-			return nil, fmt.Errorf(
-				"trusted proxy %q: %w", cidr, err,
-			)
-		}
-
-		prefixes = append(prefixes, prefix.Masked())
-	}
-
-	return prefixes, nil
-}
-
 type loggingResponseWriter struct {
 	http.ResponseWriter
 
@@ -122,70 +72,6 @@ func ipFromHostPort(hostPort string) string {
 	return host
 }
 
-// clientIP resolves the caller's address. X-Forwarded-For and
-// X-Real-IP are honoured only when the direct peer is a
-// trusted proxy; otherwise the direct peer is returned so a
-// spoofed header cannot forge the logged address.
-func clientIP(
-	remoteAddr string,
-	header http.Header,
-	trusted []netip.Prefix,
-) string {
-	peer := ipFromHostPort(remoteAddr)
-
-	if !addrInAny(peer, trusted) {
-		return peer
-	}
-
-	if xff := firstForwardedFor(header.Get("X-Forwarded-For")); xff != "" {
-		return xff
-	}
-
-	if xr := strings.TrimSpace(header.Get("X-Real-IP")); validIP(xr) {
-		return xr
-	}
-
-	return peer
-}
-
-// firstForwardedFor returns the left-most valid address in an
-// X-Forwarded-For list (the original client), or "" if none.
-func firstForwardedFor(value string) string {
-	for part := range strings.SplitSeq(value, ",") {
-		candidate := strings.TrimSpace(part)
-		if validIP(candidate) {
-			return candidate
-		}
-	}
-
-	return ""
-}
-
-func validIP(s string) bool {
-	_, err := netip.ParseAddr(s)
-
-	return err == nil
-}
-
-// addrInAny reports whether s parses as an address contained
-// in any of the trusted prefixes.
-func addrInAny(s string, trusted []netip.Prefix) bool {
-	addr, err := netip.ParseAddr(s)
-	if err != nil {
-		return false
-	}
-
-	addr = addr.Unmap()
-
-	for _, prefix := range trusted {
-		if prefix.Contains(addr) {
-			return true
-		}
-	}
-
-	return false
-}
-
 // Logging returns middleware that logs each request with
 // timing, status code, and client information.
 func (s *Middleware) Logging() func(http.Handler) http.Handler {
@@ -210,11 +96,7 @@ func (s *Middleware) Logging() func(http.Handler) http.Handler {
 						"referer", r.Referer(),
 						"proto", r.Proto,
 						"remote_ip",
-						clientIP(
+						ipFromHostPort(r.RemoteAddr),
-							r.RemoteAddr,
-							r.Header,
-							s.trustedProxies,
-						),
 						"status", lrw.statusCode,
 						"latency_ms",
 						latency.Milliseconds(),
@@ -227,137 +109,21 @@ func (s *Middleware) Logging() func(http.Handler) http.Handler {
 	}
 }
 
-// SecurityHeaders returns middleware that sets response
+// CORS returns middleware that adds permissive CORS headers.
-// security headers. It runs before CORS so the headers are
+func (s *Middleware) CORS() func(http.Handler) http.Handler {
-// present on preflight responses the CORS handler writes.
-func (s *Middleware) SecurityHeaders() func(http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(
-			func(w http.ResponseWriter, r *http.Request) {
-				h := w.Header()
-				h.Set("Strict-Transport-Security", hstsValue)
-				h.Set("Content-Security-Policy", cspValue)
-				h.Set("X-Frame-Options", "DENY")
-				h.Set("X-Content-Type-Options", "nosniff")
-				h.Set("Referrer-Policy", "no-referrer")
-				h.Set("Permissions-Policy", permissionsPolicyValue)
-
-				next.ServeHTTP(w, r)
-			},
-		)
-	}
-}
-
-// writeJSONError writes the shared JSON error body with the
-// given status. Used where middleware must reject a request
-// before it reaches a handler.
-func writeJSONError(w http.ResponseWriter, status int) {
-	w.Header().Set("Content-Type", jsonContentType)
-	w.WriteHeader(status)
-	_, _ = io.WriteString(w, jsonErrorBody)
-}
-
-// MaxBodyBytes returns middleware that caps the request body at
-// limit bytes. A declared Content-Length over the limit is
-// rejected immediately with 413. Bodies without a declared
-// length (or that understate it) are capped as they are read, so
-// a handler that reads the body sees a *http.MaxBytesError it can
-// map to 413. Mounted again on a route group, it can only lower
-// the limit: a cap applied earlier in the chain still holds.
-func (s *Middleware) MaxBodyBytes(
-	limit int64,
-) func(http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(
-			func(w http.ResponseWriter, r *http.Request) {
-				if r.ContentLength > limit {
-					writeJSONError(
-						w,
-						http.StatusRequestEntityTooLarge,
-					)
-
-					return
-				}
-
-				r.Body = http.MaxBytesReader(w, r.Body, limit)
-
-				next.ServeHTTP(w, r)
-			},
-		)
-	}
-}
-
-// Recoverer returns middleware that recovers from a panic in a
-// downstream handler, logs the panic and stack trace through
-// slog, and responds 500 with no body. http.ErrAbortHandler is
-// re-panicked so the server can abort the response as intended.
-func (s *Middleware) Recoverer() func(http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		return http.HandlerFunc(
-			func(w http.ResponseWriter, r *http.Request) {
-				defer func() {
-					rec := recover()
-					if rec == nil {
-						return
-					}
-
-					err, ok := rec.(error)
-					if ok && errors.Is(err, http.ErrAbortHandler) {
-						panic(rec)
-					}
-
-					s.log.ErrorContext(r.Context(),
-						"panic recovered",
-						"panic", fmt.Sprintf("%v", rec),
-						"stack", string(debug.Stack()),
-					)
-
-					w.WriteHeader(http.StatusInternalServerError)
-				}()
-
-				next.ServeHTTP(w, r)
-			},
-		)
-	}
-}
-
-// CORS returns middleware that lets pages served from the given
-// origins call the API. With no origins it adds no CORS headers at
-// all, so only same-origin pages can use the API. That case must not
-// reach cors.Handler, which treats an empty origin list as "allow
-// every origin".
-func (s *Middleware) CORS(
-	origins []string,
-) func(http.Handler) http.Handler {
-	if len(origins) == 0 {
-		return func(next http.Handler) http.Handler { return next }
-	}
-
 	return cors.Handler(cors.Options{
-		AllowedOrigins:   origins,
+		AllowedOrigins: []string{"*"},
-		AllowedMethods:   []string{http.MethodGet, http.MethodPost},
+		AllowedMethods: []string{
-		AllowedHeaders:   []string{"Content-Type"},
+			"GET", "POST", "PUT", "DELETE", "OPTIONS",
+		},
+		AllowedHeaders: []string{
+			"Accept",
+			"Authorization",
+			"Content-Type",
+			"X-CSRF-Token",
+		},
+		ExposedHeaders:   []string{"Link"},
 		AllowCredentials: false,
 		MaxAge:           corsMaxAgeSec,
 	})
 }
-
-// RateLimit returns middleware that allows each client address
-// perMinute requests a minute and answers the rest with 429, the
-// Retry-After header httprate sets, and the usual error body. The
-// address is the one clientIP resolves, so clients behind the reverse
-// proxy are limited one by one, not together as the proxy.
-func (s *Middleware) RateLimit(
-	perMinute int,
-) func(http.Handler) http.Handler {
-	return httprate.LimitBy(perMinute, time.Minute,
-		func(r *http.Request) (string, error) {
-			return clientIP(r.RemoteAddr, r.Header, s.trustedProxies), nil
-		},
-		httprate.WithLimitHandler(
-			func(w http.ResponseWriter, _ *http.Request) {
-				writeJSONError(w, http.StatusTooManyRequests)
-			},
-		),
-	)
-}

backend/internal/middleware/middleware_test.go

@@ -1,505 +0,0 @@
-package middleware_test
-
-import (
-	"bytes"
-	"encoding/json"
-	"errors"
-	"log/slog"
-	"net/http"
-	"net/http/httptest"
-	"net/netip"
-	"strings"
-	"testing"
-	"testing/synctest"
-	"time"
-
-	"sneak.berlin/go/netwatch/internal/middleware"
-)
-
-const (
-	// loopbackPeer is a remote address inside the trusted-proxy allowlist.
-	loopbackPeer = "127.0.0.1:5000"
-	// forwardedIP is the client address presented via X-Forwarded-For.
-	forwardedIP = "203.0.113.7"
-	// realIP is the client address presented via X-Real-IP.
-	realIP = "203.0.113.9"
-)
-
-func mustPrefixes(t *testing.T, cidrs ...string) []netip.Prefix {
-	t.Helper()
-
-	prefixes, err := middleware.ParseTrustedProxies(cidrs)
-	if err != nil {
-		t.Fatalf("ParseTrustedProxies(%v): %v", cidrs, err)
-	}
-
-	return prefixes
-}
-
-func TestParseTrustedProxiesRejectsMalformed(t *testing.T) {
-	t.Parallel()
-
-	_, err := middleware.ParseTrustedProxies([]string{"not-a-cidr"})
-	if err == nil {
-		t.Fatal("expected error for malformed CIDR, got nil")
-	}
-}
-
-type clientIPCase struct {
-	name       string
-	remoteAddr string
-	xff        string
-	xRealIP    string
-	want       string
-}
-
-func clientIPCases() []clientIPCase {
-	return []clientIPCase{
-		{
-			name:       "trusted proxy uses forwarded-for",
-			remoteAddr: loopbackPeer,
-			xff:        forwardedIP,
-			want:       forwardedIP,
-		},
-		{
-			name:       "trusted proxy uses left-most of chain",
-			remoteAddr: "10.1.2.3:5000",
-			xff:        forwardedIP + ", 10.1.2.3",
-			want:       forwardedIP,
-		},
-		{
-			name:       "trusted proxy falls back to x-real-ip",
-			remoteAddr: loopbackPeer,
-			xRealIP:    realIP,
-			want:       realIP,
-		},
-		{
-			name:       "untrusted peer ignores forwarded-for",
-			remoteAddr: "198.51.100.4:5000",
-			xff:        forwardedIP,
-			want:       "198.51.100.4",
-		},
-		{
-			name:       "untrusted peer ignores x-real-ip",
-			remoteAddr: "198.51.100.4:5000",
-			xRealIP:    realIP,
-			want:       "198.51.100.4",
-		},
-		{
-			name:       "trusted proxy with no headers uses peer",
-			remoteAddr: "10.1.2.3:5000",
-			want:       "10.1.2.3",
-		},
-		{
-			name:       "trusted proxy with garbage header uses peer",
-			remoteAddr: loopbackPeer,
-			xff:        "not-an-ip",
-			want:       "127.0.0.1",
-		},
-	}
-}
-
-func TestClientIP(t *testing.T) {
-	t.Parallel()
-
-	trusted := mustPrefixes(t, "127.0.0.1/32", "::1/128", "10.0.0.0/8")
-
-	for _, tc := range clientIPCases() {
-		t.Run(tc.name, func(t *testing.T) {
-			t.Parallel()
-
-			header := http.Header{}
-			if tc.xff != "" {
-				header.Set("X-Forwarded-For", tc.xff)
-			}
-
-			if tc.xRealIP != "" {
-				header.Set("X-Real-IP", tc.xRealIP)
-			}
-
-			got := middleware.ClientIP(tc.remoteAddr, header, trusted)
-			if got != tc.want {
-				t.Errorf("ClientIP() = %q, want %q", got, tc.want)
-			}
-		})
-	}
-}
-
-func TestSecurityHeaders(t *testing.T) {
-	t.Parallel()
-
-	handler := (&middleware.Middleware{}).SecurityHeaders()(
-		http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
-			w.WriteHeader(http.StatusOK)
-		}),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/", http.NoBody)
-	handler.ServeHTTP(rec, req)
-
-	want := map[string]string{
-		"Strict-Transport-Security": "max-age=31536000; includeSubDomains",
-		"Content-Security-Policy":   "default-src 'none'; frame-ancestors 'none'",
-		"X-Frame-Options":           "DENY",
-		"X-Content-Type-Options":    "nosniff",
-		"Referrer-Policy":           "no-referrer",
-		"Permissions-Policy":        "camera=(), microphone=(), geolocation=()",
-	}
-
-	for name, value := range want {
-		if got := rec.Header().Get(name); got != value {
-			t.Errorf("header %s = %q, want %q", name, got, value)
-		}
-	}
-}
-
-// TestMaxBodyBytesRejectsOversizeOnNonReadingRoute confirms the
-// limit is enforced even for a handler that never reads the body
-// (for example the health check), via the Content-Length check.
-func TestMaxBodyBytesRejectsOversizeOnNonReadingRoute(t *testing.T) {
-	t.Parallel()
-
-	const limit = 16
-
-	called := false
-	handler := (&middleware.Middleware{}).MaxBodyBytes(limit)(
-		http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
-			called = true
-		}),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/.well-known/healthcheck",
-		strings.NewReader(strings.Repeat("x", limit+1)),
-	)
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusRequestEntityTooLarge {
-		t.Fatalf("status = %d, want %d",
-			rec.Code, http.StatusRequestEntityTooLarge)
-	}
-
-	if called {
-		t.Fatal("handler ran despite oversize body")
-	}
-
-	if got := rec.Body.String(); got != "{\"status\":\"error\"}\n" {
-		t.Errorf("body = %q, want %q", got, "{\"status\":\"error\"}\n")
-	}
-
-	got := rec.Header().Get("Content-Type")
-	if got != "application/json; charset=utf-8" {
-		t.Errorf("Content-Type = %q, want a JSON content type", got)
-	}
-}
-
-func TestMaxBodyBytesAllowsWithinLimit(t *testing.T) {
-	t.Parallel()
-
-	const limit = 64
-
-	handler := (&middleware.Middleware{}).MaxBodyBytes(limit)(
-		http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
-			w.WriteHeader(http.StatusOK)
-		}),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports",
-		strings.NewReader(`{"clientId":"c1"}`),
-	)
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusOK {
-		t.Fatalf("status = %d, want %d", rec.Code, http.StatusOK)
-	}
-}
-
-func TestRecovererReturns500AndLogsThroughSlog(t *testing.T) {
-	t.Parallel()
-
-	var logbuf bytes.Buffer
-
-	mw := middleware.NewWithLogger(
-		slog.New(slog.NewJSONHandler(&logbuf, nil)),
-	)
-
-	handler := mw.Recoverer()(
-		http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
-			panic("boom")
-		}),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/", http.NoBody)
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusInternalServerError {
-		t.Fatalf("status = %d, want %d",
-			rec.Code, http.StatusInternalServerError)
-	}
-
-	var record map[string]any
-
-	err := json.Unmarshal(logbuf.Bytes(), &record)
-	if err != nil {
-		t.Fatalf("panic log is not one JSON record: %v (%q)", err, logbuf.String())
-	}
-
-	if record["msg"] != "panic recovered" || record["level"] != "ERROR" {
-		t.Errorf("log record = %v, want msg %q at level ERROR",
-			record, "panic recovered")
-	}
-
-	if record["panic"] != "boom" {
-		t.Errorf("panic field = %v, want %q", record["panic"], "boom")
-	}
-
-	stack, _ := record["stack"].(string)
-	if !strings.HasPrefix(stack, "goroutine ") {
-		t.Errorf("stack field = %q, want a stack trace", stack)
-	}
-}
-
-// TestRecovererRepanicsOnAbortHandler checks that a handler aborting
-// with http.ErrAbortHandler is not treated as a crash: Recoverer
-// panics again so the server aborts the response, and logs nothing.
-func TestRecovererRepanicsOnAbortHandler(t *testing.T) {
-	t.Parallel()
-
-	var logbuf bytes.Buffer
-
-	mw := middleware.NewWithLogger(
-		slog.New(slog.NewJSONHandler(&logbuf, nil)),
-	)
-
-	handler := mw.Recoverer()(
-		http.HandlerFunc(func(_ http.ResponseWriter, _ *http.Request) {
-			panic(http.ErrAbortHandler)
-		}),
-	)
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(), http.MethodGet, "/", http.NoBody)
-
-	var recovered any
-
-	func() {
-		defer func() { recovered = recover() }()
-
-		handler.ServeHTTP(rec, req)
-	}()
-
-	err, _ := recovered.(error)
-	if !errors.Is(err, http.ErrAbortHandler) {
-		t.Errorf("Recoverer panicked with %v, want http.ErrAbortHandler", recovered)
-	}
-
-	if logbuf.Len() != 0 {
-		t.Errorf("abort was logged: %q", logbuf.String())
-	}
-}
-
-// okHandler stands in for the route a middleware guards.
-func okHandler() http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
-		w.WriteHeader(http.StatusOK)
-	})
-}
-
-// TestRateLimitRefusesPastAllowanceThenResets checks one client
-// address: it may use its whole allowance at once, the next request
-// is refused with 429, and later it may send again.
-func TestRateLimitRefusesPastAllowanceThenResets(t *testing.T) {
-	t.Parallel()
-
-	// synctest runs this on a fake clock: time.Sleep returns at once,
-	// with the clock moved on.
-	synctest.Test(t, func(t *testing.T) {
-		const perMinute = 2
-
-		handler := (&middleware.Middleware{}).RateLimit(perMinute)(okHandler())
-
-		post := func() *httptest.ResponseRecorder {
-			rec := httptest.NewRecorder()
-			req := httptest.NewRequestWithContext(t.Context(),
-				http.MethodPost, "/api/v1/reports", http.NoBody)
-			handler.ServeHTTP(rec, req)
-
-			return rec
-		}
-
-		for i := range perMinute {
-			if code := post().Code; code != http.StatusOK {
-				t.Fatalf("request %d: status = %d, want %d",
-					i+1, code, http.StatusOK)
-			}
-		}
-
-		rec := post()
-		if rec.Code != http.StatusTooManyRequests {
-			t.Fatalf("request past the allowance: status = %d, want %d",
-				rec.Code, http.StatusTooManyRequests)
-		}
-
-		if got := rec.Body.String(); got != "{\"status\":\"error\"}\n" {
-			t.Errorf("body = %q, want %q", got, "{\"status\":\"error\"}\n")
-		}
-
-		if got := rec.Header().Get("Retry-After"); got != "60" {
-			t.Fatalf("Retry-After = %q, want %q", got, "60")
-		}
-
-		// httprate also counts the previous minute's requests, fading
-		// them out over the current one, so two minutes on the whole
-		// allowance is back.
-		time.Sleep(2 * time.Minute)
-
-		for i := range perMinute {
-			if code := post().Code; code != http.StatusOK {
-				t.Fatalf("two minutes later, request %d: status = %d, want %d",
-					i+1, code, http.StatusOK)
-			}
-		}
-	})
-}
-
-// postForwarded sends handler a report from peer that names client in
-// X-Forwarded-For, and returns the status.
-func postForwarded(
-	t *testing.T,
-	handler http.Handler,
-	peer, client string,
-) int {
-	t.Helper()
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodPost, "/api/v1/reports", http.NoBody)
-	req.RemoteAddr = peer
-	req.Header.Set("X-Forwarded-For", client)
-	handler.ServeHTTP(rec, req)
-
-	return rec.Code
-}
-
-// TestRateLimitIsPerForwardedClient checks that clients behind a
-// trusted proxy each get their own allowance: the limit is keyed on
-// the client address clientIP resolves, not on the proxy's.
-func TestRateLimitIsPerForwardedClient(t *testing.T) {
-	t.Parallel()
-
-	const otherClient = "203.0.113.8"
-
-	mw := middleware.NewWithTrustedProxies(mustPrefixes(t, "127.0.0.1/32"))
-	handler := mw.RateLimit(1)(okHandler())
-
-	code := postForwarded(t, handler, loopbackPeer, forwardedIP)
-	if code != http.StatusOK {
-		t.Fatalf("first request: status = %d, want %d", code, http.StatusOK)
-	}
-
-	code = postForwarded(t, handler, loopbackPeer, forwardedIP)
-	if code != http.StatusTooManyRequests {
-		t.Fatalf("same client again: status = %d, want %d",
-			code, http.StatusTooManyRequests)
-	}
-
-	code = postForwarded(t, handler, loopbackPeer, otherClient)
-	if code != http.StatusOK {
-		t.Fatalf("other client behind the same proxy: status = %d, want %d",
-			code, http.StatusOK)
-	}
-}
-
-// TestRateLimitIgnoresForwardedForFromUntrustedPeer checks that a
-// peer that is not a trusted proxy cannot get a fresh allowance by
-// naming a different client in X-Forwarded-For on each request.
-func TestRateLimitIgnoresForwardedForFromUntrustedPeer(t *testing.T) {
-	t.Parallel()
-
-	const untrustedPeer = "198.51.100.4:5000"
-
-	mw := middleware.NewWithTrustedProxies(mustPrefixes(t, "127.0.0.1/32"))
-	handler := mw.RateLimit(1)(okHandler())
-
-	code := postForwarded(t, handler, untrustedPeer, "203.0.113.8")
-	if code != http.StatusOK {
-		t.Fatalf("first request: status = %d, want %d", code, http.StatusOK)
-	}
-
-	code = postForwarded(t, handler, untrustedPeer, "203.0.113.9")
-	if code != http.StatusTooManyRequests {
-		t.Fatalf("same peer naming another client: status = %d, want %d",
-			code, http.StatusTooManyRequests)
-	}
-}
-
-// preflight sends cors the preflight request a browser makes before
-// it POSTs JSON from origin.
-func preflight(
-	t *testing.T,
-	cors func(http.Handler) http.Handler,
-	origin string,
-) *httptest.ResponseRecorder {
-	t.Helper()
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodOptions, "/api/v1/reports", http.NoBody)
-	req.Header.Set("Origin", origin)
-	req.Header.Set("Access-Control-Request-Method", http.MethodPost)
-	req.Header.Set("Access-Control-Request-Headers", "content-type")
-	cors(okHandler()).ServeHTTP(rec, req)
-
-	return rec
-}
-
-// TestCORSWithoutOriginsAddsNoHeaders checks the default: with no
-// origins configured, no origin is given any CORS header.
-func TestCORSWithoutOriginsAddsNoHeaders(t *testing.T) {
-	t.Parallel()
-
-	rec := preflight(t,
-		(&middleware.Middleware{}).CORS(nil), "https://elsewhere.example")
-
-	for name := range rec.Header() {
-		if strings.HasPrefix(name, "Access-Control-") {
-			t.Errorf("CORS header %s set with no origins configured", name)
-		}
-	}
-}
-
-func TestCORSAllowsOnlyListedOrigins(t *testing.T) {
-	t.Parallel()
-
-	const listed = "https://netwatch.example"
-
-	cors := (&middleware.Middleware{}).CORS([]string{listed})
-
-	cases := []struct {
-		name   string
-		origin string
-		want   string
-	}{
-		{name: "listed origin allowed", origin: listed, want: listed},
-		{name: "other origin refused", origin: "https://elsewhere.example"},
-	}
-
-	for _, tc := range cases {
-		t.Run(tc.name, func(t *testing.T) {
-			t.Parallel()
-
-			rec := preflight(t, cors, tc.origin)
-
-			got := rec.Header().Get("Access-Control-Allow-Origin")
-			if got != tc.want {
-				t.Errorf("Access-Control-Allow-Origin = %q, want %q",
-					got, tc.want)
-			}
-		})
-	}
-}

backend/internal/reportbuf/export_test.go

@@ -1,7 +0,0 @@
-package reportbuf
-
-// Flush writes the buffered reports to a file now, as the periodic
-// flush does, so tests need not wait a minute for it.
-func (b *Buffer) Flush() error {
-	return b.flushLocked()
-}

backend/internal/reportbuf/reportbuf.go

@@ -6,15 +6,12 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/fs"
 	"log/slog"
 	"os"
 	"path/filepath"
-	"strings"
 	"sync"
-	"sync/atomic"
 	"time"
 
 	"sneak.berlin/go/netwatch/internal/config"
@@ -30,17 +27,8 @@ const (
 	defaultDataDir                 = "./data/reports"
 	dirPerms           fs.FileMode = 0o750
 	filePerms          fs.FileMode = 0o640
-
-	// Report files are named filePrefix + timestamp + "-" + number +
-	// fileSuffix; see writeFile.
-	filePrefix = "reports-"
-	fileSuffix = ".jsonl.zst"
 )
 
-// ErrFull is returned by Append when storing the report would
-// take the report files past the configured maximum size.
-var ErrFull = errors.New("report files at their size cap")
-
 // Params defines the dependencies for Buffer.
 type Params struct {
 	fx.In
@@ -56,16 +44,7 @@ type Buffer struct {
 	dataDir string
 	done    chan struct{}
 	log     *slog.Logger
-	maxBytes int64
 	mu      sync.Mutex
-	// seq numbers the report files, so that two named in the same
-	// millisecond still get different names.
-	seq      atomic.Uint64
-	stopOnce sync.Once
-	// usedBytes is what Append checks against maxBytes: the size
-	// of the report files in dataDir, plus the reports not yet
-	// written to one at their uncompressed size.
-	usedBytes int64
 }
 
 // New creates a Buffer and registers lifecycle hooks to
@@ -83,7 +62,6 @@ func New(
 		dataDir: dir,
 		done:    make(chan struct{}),
 		log:     params.Logger.Get(),
-		maxBytes: params.Config.DataDirMaxBytes,
 	}
 
 	lc.Append(fx.Hook{
@@ -93,30 +71,15 @@ func New(
 				return fmt.Errorf("create data dir: %w", err)
 			}
 
-			// Report files left by earlier runs count too.
-			b.usedBytes, err = reportFilesSize(b.dataDir)
-			if err != nil {
-				return err
-			}
-
 			go b.flushLoop()
 
 			return nil
 		},
 		OnStop: func(_ context.Context) error {
-			// stopOnce makes OnStop idempotent: a second
-			// invocation must not close an already-closed channel
-			// (which would panic) or flush again.
-			var err error
-
-			b.stopOnce.Do(func() {
 			close(b.done)
-				err = b.flushLocked()
+			b.flushLocked()
-			})
 
-			// A failed final flush fails the stop, so the process
+			return nil
-			// exits non-zero.
-			return err
 		},
 	})
 
@@ -124,27 +87,15 @@ func New(
 }
 
 // Append marshals v as a single JSON line and appends it to
-// the buffer. It stores nothing and returns ErrFull if the line
+// the buffer. If the buffer reaches the size threshold, it is
-// would take usedBytes past maxBytes. If the buffer reaches the
+// drained and written to disk asynchronously.
-// size threshold, it is drained and written to disk
-// asynchronously.
 func (b *Buffer) Append(v any) error {
 	line, err := json.Marshal(v)
 	if err != nil {
 		return fmt.Errorf("marshal report: %w", err)
 	}
 
-	lineBytes := int64(len(line)) + 1 // with its newline
-
 	b.mu.Lock()
-
-	if b.usedBytes+lineBytes > b.maxBytes {
-		b.mu.Unlock()
-
-		return ErrFull
-	}
-
-	b.usedBytes += lineBytes
 	b.buf.Write(line)
 	b.buf.WriteByte('\n')
 
@@ -152,12 +103,7 @@ func (b *Buffer) Append(v any) error {
 		data := b.drainBuf()
 		b.mu.Unlock()
 
-		go func() {
+		go b.writeFile(data)
-			writeErr := b.writeFile(data)
-			if writeErr != nil {
-				b.log.Error("flush reports failed", "error", writeErr)
-			}
-		}()
 
 		return nil
 	}
@@ -176,10 +122,7 @@ func (b *Buffer) flushLoop() {
 	for {
 		select {
 		case <-ticker.C:
-			err := b.flushLocked()
+			b.flushLocked()
-			if err != nil {
-				b.log.Error("flush reports failed", "error", err)
-			}
 		case <-b.done:
 			return
 		}
@@ -188,19 +131,19 @@ func (b *Buffer) flushLoop() {
 
 // flushLocked acquires the lock, drains the buffer, and
 // writes the data to a compressed file.
-func (b *Buffer) flushLocked() error {
+func (b *Buffer) flushLocked() {
 	b.mu.Lock()
 
 	if b.buf.Len() == 0 {
 		b.mu.Unlock()
 
-		return nil
+		return
 	}
 
 	data := b.drainBuf()
 	b.mu.Unlock()
 
-	return b.writeFile(data)
+	b.writeFile(data)
 }
 
 // drainBuf copies the buffer contents and resets it.
@@ -215,91 +158,42 @@ func (b *Buffer) drainBuf() []byte {
 
 // writeFile creates a timestamped zstd-compressed JSONL file
 // in the data directory.
-func (b *Buffer) writeFile(data []byte) error {
+func (b *Buffer) writeFile(data []byte) {
-	// The timestamp comes first, so the names sort by time; the number
-	// after it tells apart files named in the same millisecond.
 	ts := time.Now().UTC().Format("2006-01-02T15-04-05.000Z")
-	name := fmt.Sprintf("%s%s-%d%s", filePrefix, ts, b.seq.Add(1), fileSuffix)
+	name := fmt.Sprintf("reports-%s.jsonl.zst", ts)
 	path := filepath.Join(b.dataDir, name)
 
-	// path is built from the operator-supplied dataDir plus a
+	f, err := os.OpenFile( //nolint:gosec // path built from controlled dataDir + timestamp
-	// generated timestamp and number, so it carries no external input.
-	f, err := os.OpenFile( //nolint:gosec // see comment above
 		path,
 		os.O_WRONLY|os.O_CREATE|os.O_EXCL,
 		filePerms,
 	)
 	if err != nil {
-		return fmt.Errorf("create report file: %w", err)
+		b.log.Error("create report file", "error", err)
+
+		return
 	}
 
-	// Closes the file on the early returns below. The success
-	// path closes it explicitly to check the error; closing it
-	// a second time here is harmless.
 	defer func() { _ = f.Close() }()
 
 	enc, err := zstd.NewWriter(f)
 	if err != nil {
-		return fmt.Errorf("create zstd encoder: %w", err)
+		b.log.Error("create zstd encoder", "error", err)
+
+		return
 	}
 
-	_, err = enc.Write(data)
+	_, writeErr := enc.Write(data)
-	if err != nil {
+	if writeErr != nil {
+		b.log.Error("write compressed data", "error", writeErr)
+
 		_ = enc.Close()
 
-		return fmt.Errorf("write compressed data: %w", err)
+		return
 	}
 
-	err = enc.Close()
+	closeErr := enc.Close()
-	if err != nil {
+	if closeErr != nil {
-		return fmt.Errorf("close zstd encoder: %w", err)
+		b.log.Error("close zstd encoder", "error", closeErr)
 	}
-
-	info, err := f.Stat()
-	if err != nil {
-		return fmt.Errorf("stat report file: %w", err)
-	}
-
-	err = f.Close()
-	if err != nil {
-		return fmt.Errorf("close report file: %w", err)
-	}
-
-	// The reports counted at their uncompressed size while they
-	// waited; now they count as the file. After a failed write they
-	// stay counted as they were, which errs toward refusing reports
-	// early rather than letting the files pass the cap.
-	b.mu.Lock()
-	b.usedBytes += info.Size() - int64(len(data))
-	b.mu.Unlock()
-
-	return nil
-}
-
-// reportFilesSize returns the total size of the report files in
-// dir.
-func reportFilesSize(dir string) (int64, error) {
-	entries, err := os.ReadDir(dir)
-	if err != nil {
-		return 0, fmt.Errorf("read data dir: %w", err)
-	}
-
-	var total int64
-
-	for _, entry := range entries {
-		name := entry.Name()
-		if !strings.HasPrefix(name, filePrefix) ||
-			!strings.HasSuffix(name, fileSuffix) {
-			continue
-		}
-
-		info, err := entry.Info()
-		if err != nil {
-			return 0, fmt.Errorf("stat report file: %w", err)
-		}
-
-		total += info.Size()
-	}
-
-	return total, nil
 }

backend/internal/reportbuf/reportbuf_test.go

@@ -1,458 +1,13 @@
 package reportbuf_test
 
 import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io/fs"
-	"os"
-	"path/filepath"
-	"slices"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
 	"testing"
-	"time"
 
-	"sneak.berlin/go/netwatch/internal/config"
+	_ "sneak.berlin/go/netwatch/internal/reportbuf"
-	"sneak.berlin/go/netwatch/internal/globals"
-	"sneak.berlin/go/netwatch/internal/logger"
-	"sneak.berlin/go/netwatch/internal/reportbuf"
-
-	"github.com/klauspost/compress/zstd"
-	"go.uber.org/fx"
-	"go.uber.org/fx/fxtest"
 )
 
-// TestFlushOnShutdown proves the flush-on-shutdown path: a
+func TestImport(t *testing.T) {
-// report appended after start but before the periodic flush
+	t.Parallel()
-// window must reach disk when the fx lifecycle stops. This is
+	// Compilation check — verifies the package parses
-// the exact case that silent data loss on restart used to
+	// and all imports resolve.
-// destroy.
-func TestFlushOnShutdown(t *testing.T) {
-	dir := t.TempDir()
-	t.Setenv("DATA_DIR", dir)
-
-	var buf *reportbuf.Buffer
-
-	app := fxtest.New(t,
-		fx.Provide(
-			globals.New,
-			logger.New,
-			config.New,
-			reportbuf.New,
-		),
-		fx.Populate(&buf),
-	)
-
-	app.RequireStart()
-
-	err := buf.Append(map[string]string{"probe": "shutdown"})
-	if err != nil {
-		t.Fatalf("append report: %v", err)
-	}
-
-	// RequireStop runs the reportbuf OnStop hook, which is the
-	// only code path that flushes buffered reports on shutdown.
-	app.RequireStop()
-
-	if !hasReportFile(t, dir) {
-		t.Fatal("no report file on disk after shutdown; " +
-			"the buffered report was lost")
-	}
-}
-
-// TestFailedFinalFlushFailsStop proves a final flush that cannot
-// write its file makes the stop fail, which makes the process
-// exit non-zero instead of dropping the buffered reports silently.
-func TestFailedFinalFlushFailsStop(t *testing.T) {
-	dir := t.TempDir()
-	t.Setenv("DATA_DIR", dir)
-
-	var buf *reportbuf.Buffer
-
-	app := fxtest.New(t,
-		fx.Provide(
-			globals.New,
-			logger.New,
-			config.New,
-			reportbuf.New,
-		),
-		fx.Populate(&buf),
-	)
-
-	app.RequireStart()
-
-	err := buf.Append(map[string]string{"probe": "shutdown"})
-	if err != nil {
-		t.Fatalf("append report: %v", err)
-	}
-
-	// Removing the data directory leaves the final flush nowhere to
-	// write. A read-only directory would not do: tests run as root
-	// in the backend image, and root ignores the read-only bit.
-	err = os.RemoveAll(dir)
-	if err != nil {
-		t.Fatalf("remove data dir: %v", err)
-	}
-
-	err = app.Stop(t.Context())
-	if !errors.Is(err, fs.ErrNotExist) {
-		t.Fatalf("stop error = %v, want the final flush's error", err)
-	}
-}
-
-// startBuffer starts a Buffer through fx, as main does, with the
-// DATA_DIR and DATA_DIR_MAX_BYTES the calling test has set.
-func startBuffer(t *testing.T) *reportbuf.Buffer {
-	t.Helper()
-
-	var buf *reportbuf.Buffer
-
-	app := fxtest.New(t,
-		fx.Provide(
-			globals.New,
-			logger.New,
-			config.New,
-			reportbuf.New,
-		),
-		fx.Populate(&buf),
-	)
-
-	app.RequireStart()
-	t.Cleanup(app.RequireStop)
-
-	return buf
-}
-
-// lineBytes is what one report takes in the buffer: its JSON and a
-// newline.
-func lineBytes(t *testing.T, report any) int {
-	t.Helper()
-
-	line, err := json.Marshal(report)
-	if err != nil {
-		t.Fatalf("marshal report: %v", err)
-	}
-
-	return len(line) + 1
-}
-
-func TestAppendPastCapIsRefused(t *testing.T) {
-	report := map[string]string{"id": "cap"}
-
-	t.Setenv("DATA_DIR", t.TempDir())
-	t.Setenv("DATA_DIR_MAX_BYTES", strconv.Itoa(lineBytes(t, report)))
-
-	buf := startBuffer(t)
-
-	err := buf.Append(report)
-	if err != nil {
-		t.Fatalf("report that fills the cap exactly: %v", err)
-	}
-
-	err = buf.Append(report)
-	if !errors.Is(err, reportbuf.ErrFull) {
-		t.Fatalf("report past the cap: error = %v, want ErrFull", err)
-	}
-}
-
-// TestCapCountsReportFilesAlreadyInDataDir starts on a data
-// directory holding a report file from an earlier run, and a file
-// that is not a report, which must not count.
-func TestCapCountsReportFilesAlreadyInDataDir(t *testing.T) {
-	const earlierBytes = 100
-
-	report := map[string]string{"id": "cap"}
-	dir := t.TempDir()
-
-	writeBytes(t, filepath.Join(dir, "reports-2026-01-01T00-00-00.000Z.jsonl.zst"),
-		earlierBytes)
-	writeBytes(t, filepath.Join(dir, "notes.txt"), 10*earlierBytes)
-
-	t.Setenv("DATA_DIR", dir)
-	t.Setenv("DATA_DIR_MAX_BYTES",
-		strconv.Itoa(earlierBytes+lineBytes(t, report)))
-
-	buf := startBuffer(t)
-
-	err := buf.Append(report)
-	if err != nil {
-		t.Fatalf("report that fills the cap exactly: %v", err)
-	}
-
-	err = buf.Append(report)
-	if !errors.Is(err, reportbuf.ErrFull) {
-		t.Fatalf("report past the cap: error = %v, want ErrFull", err)
-	}
-}
-
-// TestWrittenReportsCountAtFileSize checks that once reports are
-// written, they count as their compressed file, not their
-// uncompressed size, which frees room under the cap.
-func TestWrittenReportsCountAtFileSize(t *testing.T) {
-	// Repetitive, so its file is far smaller than its JSON.
-	report := map[string]string{"id": strings.Repeat("a", 1000)}
-	size := lineBytes(t, report)
-
-	t.Setenv("DATA_DIR", t.TempDir())
-	// Room for the report twice over only if the first one counts
-	// at its file's size by the time the second arrives.
-	t.Setenv("DATA_DIR_MAX_BYTES", strconv.Itoa(2*size-1))
-
-	buf := startBuffer(t)
-
-	err := buf.Append(report)
-	if err != nil {
-		t.Fatalf("first report: %v", err)
-	}
-
-	err = buf.Flush()
-	if err != nil {
-		t.Fatalf("flush: %v", err)
-	}
-
-	err = buf.Append(report)
-	if err != nil {
-		t.Fatalf("second report, after the first was written: %v", err)
-	}
-}
-
-// TestWrittenReportsKeepCounting writes one report file after another
-// under a small cap: each report must be taken while the files on disk
-// leave room for it, and refused once they do not.
-func TestWrittenReportsKeepCounting(t *testing.T) {
-	const maxBytes = 200
-
-	report := map[string]string{"id": "written"}
-	size := int64(lineBytes(t, report))
-	dir := t.TempDir()
-
-	t.Setenv("DATA_DIR", dir)
-	t.Setenv("DATA_DIR_MAX_BYTES", strconv.Itoa(maxBytes))
-
-	buf := startBuffer(t)
-
-	// Every file takes at least a byte, so they fill the cap within
-	// maxBytes rounds.
-	for range maxBytes {
-		used := reportFilesBytes(t, dir)
-
-		err := buf.Append(report)
-		if used+size > maxBytes {
-			if !errors.Is(err, reportbuf.ErrFull) {
-				t.Fatalf("with %d bytes of report files: error = %v, "+
-					"want ErrFull", used, err)
-			}
-
-			return
-		}
-
-		if err != nil {
-			t.Fatalf("with %d bytes of report files: %v", used, err)
-		}
-
-		err = buf.Flush()
-		if err != nil {
-			t.Fatalf("flush: %v", err)
-		}
-	}
-
-	t.Fatal("the report files never filled the cap")
-}
-
-// TestConcurrentAppendsStopAtCap appends from many goroutines at once
-// with room for exactly roomFor reports: exactly that many must be
-// taken, which holds only if Append checks and counts each report
-// under one lock.
-func TestConcurrentAppendsStopAtCap(t *testing.T) {
-	const (
-		roomFor = 5
-		senders = 50
-	)
-
-	// Large, so each Append takes long enough for the senders to
-	// overlap while the cap is reached.
-	report := map[string]string{"id": strings.Repeat("a", 1_000_000)}
-
-	t.Setenv("DATA_DIR", t.TempDir())
-	t.Setenv("DATA_DIR_MAX_BYTES",
-		strconv.Itoa(roomFor*lineBytes(t, report)))
-
-	buf := startBuffer(t)
-
-	var (
-		taken atomic.Int64
-		wg    sync.WaitGroup
-	)
-
-	start := make(chan struct{})
-
-	for range senders {
-		wg.Go(func() {
-			<-start
-
-			err := buf.Append(report)
-			if err == nil {
-				taken.Add(1)
-			} else if !errors.Is(err, reportbuf.ErrFull) {
-				t.Errorf("append: %v", err)
-			}
-		})
-	}
-
-	close(start)
-	wg.Wait()
-
-	if got := taken.Load(); got != roomFor {
-		t.Fatalf("%d reports taken, want %d", got, roomFor)
-	}
-}
-
-// TestTwoFlushesInOneMillisecond flushes twice within one millisecond,
-// as a flush for size and the final flush at shutdown can: each flush
-// must write a file of its own, and the files must hold every report.
-func TestTwoFlushesInOneMillisecond(t *testing.T) {
-	// A pair of flushes may straddle a millisecond, which proves
-	// nothing, so pairs are flushed until one falls within one.
-	const maxPairs = 1000
-
-	dir := t.TempDir()
-	t.Setenv("DATA_DIR", dir)
-
-	buf := startBuffer(t)
-	flushes := 0
-
-	for pair := 1; ; pair++ {
-		start := time.Now().Truncate(time.Millisecond)
-
-		for range 2 {
-			flushes++
-
-			err := buf.Append(map[string]int{"id": flushes})
-			if err != nil {
-				t.Fatalf("append report %d: %v", flushes, err)
-			}
-
-			err = buf.Flush()
-			if err != nil {
-				t.Fatalf("flush %d: %v", flushes, err)
-			}
-		}
-
-		if time.Now().Truncate(time.Millisecond).Equal(start) {
-			break
-		}
-
-		if pair == maxPairs {
-			t.Fatalf("no pair of flushes fell within one millisecond "+
-				"in %d tries", maxPairs)
-		}
-	}
-
-	files := readReportFiles(t, dir)
-	if len(files) != flushes {
-		t.Fatalf("%d report files after %d flushes", len(files), flushes)
-	}
-
-	for id := 1; id <= flushes; id++ {
-		want := fmt.Sprintf(`{"id":%d}`+"\n", id)
-		if !slices.Contains(files, want) {
-			t.Fatalf("no report file holds report %d alone", id)
-		}
-	}
-}
-
-// reportFilesBytes returns the total size of the report files in dir.
-func reportFilesBytes(t *testing.T, dir string) int64 {
-	t.Helper()
-
-	paths, err := filepath.Glob(filepath.Join(dir, "reports-*.jsonl.zst"))
-	if err != nil {
-		t.Fatalf("list report files: %v", err)
-	}
-
-	var total int64
-
-	for _, path := range paths {
-		info, statErr := os.Stat(path)
-		if statErr != nil {
-			t.Fatalf("stat %s: %v", path, statErr)
-		}
-
-		total += info.Size()
-	}
-
-	return total
-}
-
-// readReportFiles returns the decompressed contents of each report
-// file in dir.
-func readReportFiles(t *testing.T, dir string) []string {
-	t.Helper()
-
-	files := os.DirFS(dir)
-
-	names, err := fs.Glob(files, "reports-*.jsonl.zst")
-	if err != nil {
-		t.Fatalf("list report files: %v", err)
-	}
-
-	dec, err := zstd.NewReader(nil)
-	if err != nil {
-		t.Fatalf("create zstd decoder: %v", err)
-	}
-	defer dec.Close()
-
-	contents := make([]string, 0, len(names))
-
-	for _, name := range names {
-		compressed, readErr := fs.ReadFile(files, name)
-		if readErr != nil {
-			t.Fatalf("read %s: %v", name, readErr)
-		}
-
-		data, decErr := dec.DecodeAll(compressed, nil)
-		if decErr != nil {
-			t.Fatalf("decompress %s: %v", name, decErr)
-		}
-
-		contents = append(contents, string(data))
-	}
-
-	return contents
-}
-
-func writeBytes(t *testing.T, path string, n int) {
-	t.Helper()
-
-	err := os.WriteFile(path, make([]byte, n), 0o600)
-	if err != nil {
-		t.Fatalf("write %s: %v", path, err)
-	}
-}
-
-func hasReportFile(t *testing.T, dir string) bool {
-	t.Helper()
-
-	entries, err := os.ReadDir(dir)
-	if err != nil {
-		t.Fatalf("read data dir: %v", err)
-	}
-
-	for _, e := range entries {
-		if strings.HasSuffix(e.Name(), ".jsonl.zst") {
-			info, statErr := e.Info()
-			if statErr != nil {
-				t.Fatalf("stat %s: %v", e.Name(), statErr)
-			}
-
-			if info.Size() > 0 {
-				return true
-			}
-		}
-	}
-
-	return false
 }

backend/internal/server/export_test.go

@@ -1,11 +0,0 @@
-package server
-
-// MaxRequestBodyBytes exposes the router-wide body limit to the
-// external tests.
-const MaxRequestBodyBytes = maxRequestBodyBytes
-
-// ListenAddr exposes the address the server listens on to the
-// external tests.
-func (s *Server) ListenAddr() string {
-	return s.newHTTPServer().Addr
-}

backend/internal/server/http.go

@@ -2,69 +2,42 @@ package server
 
 import (
 	"errors"
-	"net"
+	"fmt"
 	"net/http"
-	"strconv"
 	"time"
-
-	"go.uber.org/fx"
 )
 
 const (
 	readTimeout    = 10 * time.Second
-	readHeaderTimeout = 5 * time.Second
+	writeTimeout   = 10 * time.Second
-	idleTimeout       = 60 * time.Second
 	maxHeaderBytes = 1 << 20 // 1 MiB
-
-	// requestTimeout (routes.go) is the single per-request
-	// processing budget, enforced by chi's middleware.Timeout.
-	// writeTimeout must exceed that budget so a handler can write
-	// its 503 when the chi timeout fires; if it were shorter the
-	// server would abort the write first and the chi budget would
-	// be unreachable dead configuration.
-	writeTimeout = requestTimeout + 5*time.Second
 )
 
-// newHTTPServer constructs the http.Server. It performs no I/O
+func (s *Server) serveUntilShutdown() {
-// and does not start listening.
+	listenAddr := fmt.Sprintf(":%d", s.params.Config.Port)
-func (s *Server) newHTTPServer() *http.Server {
-	listenAddr := net.JoinHostPort(
-		s.params.Config.BindAddress,
-		strconv.Itoa(s.params.Config.Port),
-	)
 
-	return &http.Server{
+	s.httpServer = &http.Server{
 		Addr:           listenAddr,
 		Handler:        s,
 		MaxHeaderBytes: maxHeaderBytes,
 		ReadTimeout:    readTimeout,
-		ReadHeaderTimeout: readHeaderTimeout,
 		WriteTimeout:   writeTimeout,
-		IdleTimeout:       idleTimeout,
 	}
-}
 
-// listenAndServe runs the listener until the server is shut
+	s.SetupRoutes()
-// down. A genuine listen failure (not the expected
+
-// ErrServerClosed from a clean shutdown) requests process
-// shutdown through fx with a non-zero exit code, so the failure
-// is visible to any supervisor.
-func (s *Server) listenAndServe() {
 	s.log.Info("http begin listen",
-		"listenaddr", s.httpServer.Addr,
+		"listenaddr", listenAddr,
 		"version", s.params.Globals.Version,
 		"buildarch", s.params.Globals.Buildarch,
 	)
 
 	err := s.httpServer.ListenAndServe()
-	if err == nil || errors.Is(err, http.ErrServerClosed) {
+	if err != nil && !errors.Is(err, http.ErrServerClosed) {
-		return
-	}
-
 		s.log.Error("listen error", "error", err)
 
-	shutdownErr := s.shutdowner.Shutdown(fx.ExitCode(1))
+		if s.cancelFunc != nil {
-	if shutdownErr != nil {
+			s.cancelFunc()
-		s.log.Error("request shutdown failed", "error", shutdownErr)
+		}
 	}
 }

backend/internal/server/http_test.go

@@ -1,32 +0,0 @@
-package server_test
-
-import "testing"
-
-// TestListenAddress checks that the server listens on BIND_ADDRESS
-// and PORT, and on port 8080 on every interface when neither is set.
-// The container image sets both, to keep the backend on loopback
-// behind nginx.
-func TestListenAddress(t *testing.T) {
-	tests := []struct {
-		bindAddress string
-		port        string
-		want        string
-	}{
-		{bindAddress: "", port: "", want: ":8080"},
-		{bindAddress: "127.0.0.1", port: "8081", want: "127.0.0.1:8081"},
-		{bindAddress: "::1", port: "8081", want: "[::1]:8081"},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.want, func(t *testing.T) {
-			// t.Setenv rules out t.Parallel.
-			t.Setenv("BIND_ADDRESS", tt.bindAddress)
-			t.Setenv("PORT", tt.port)
-
-			got := newServer(t).ListenAddr()
-			if got != tt.want {
-				t.Errorf("listen address = %q, want %q", got, tt.want)
-			}
-		})
-	}
-}

backend/internal/server/routes.go

@@ -7,26 +7,17 @@ import (
 	"github.com/go-chi/chi/v5/middleware"
 )
 
-const (
+const requestTimeout = 60 * time.Second
-	requestTimeout = 60 * time.Second
-
-	// maxRequestBodyBytes caps every request body. A route group
-	// can mount s.mw.MaxBodyBytes with a smaller value to lower
-	// its bound, but cannot raise it: this cap runs first.
-	maxRequestBodyBytes int64 = 1 << 20 // 1 MiB
-)
 
 // SetupRoutes configures the chi router with middleware and
 // all application routes.
 func (s *Server) SetupRoutes() {
 	s.router = chi.NewRouter()
 
-	s.router.Use(s.mw.Recoverer())
+	s.router.Use(middleware.Recoverer)
 	s.router.Use(middleware.RequestID)
 	s.router.Use(s.mw.Logging())
-	s.router.Use(s.mw.SecurityHeaders())
+	s.router.Use(s.mw.CORS())
-	s.router.Use(s.mw.CORS(s.params.Config.CORSAllowedOrigins))
-	s.router.Use(s.mw.MaxBodyBytes(maxRequestBodyBytes))
 	s.router.Use(middleware.Timeout(requestTimeout))
 
 	s.router.Get(
@@ -35,7 +26,6 @@ func (s *Server) SetupRoutes() {
 	)
 
 	s.router.Route("/api/v1", func(r chi.Router) {
-		r.With(s.mw.RateLimit(s.params.Config.ReportsPerMinute)).
+		r.Post("/reports", s.h.HandleReport())
-			Post("/reports", s.h.HandleReport())
 	})
 }

backend/internal/server/routes_test.go

@@ -1,142 +0,0 @@
-package server_test
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"sneak.berlin/go/netwatch/internal/config"
-	"sneak.berlin/go/netwatch/internal/globals"
-	"sneak.berlin/go/netwatch/internal/handlers"
-	"sneak.berlin/go/netwatch/internal/healthcheck"
-	"sneak.berlin/go/netwatch/internal/logger"
-	"sneak.berlin/go/netwatch/internal/middleware"
-	"sneak.berlin/go/netwatch/internal/reportbuf"
-	"sneak.berlin/go/netwatch/internal/server"
-
-	"go.uber.org/fx"
-	"go.uber.org/fx/fxtest"
-)
-
-// newServer builds a Server from the same constructors as main,
-// configured from the environment. It is never started, so nothing
-// listens.
-func newServer(t *testing.T) *server.Server {
-	t.Helper()
-
-	var srv *server.Server
-
-	app := fxtest.New(t,
-		fx.Provide(
-			config.New,
-			globals.New,
-			handlers.New,
-			healthcheck.New,
-			logger.New,
-			middleware.New,
-			reportbuf.New,
-			server.New,
-		),
-		fx.Populate(&srv),
-	)
-
-	err := app.Err()
-	if err != nil {
-		t.Fatalf("build server: %v", err)
-	}
-
-	return srv
-}
-
-// TestReportsAreRateLimited checks that POST /api/v1/reports is
-// behind the per-address rate limit, set here to two a minute.
-func TestReportsAreRateLimited(t *testing.T) {
-	t.Setenv("REPORTS_PER_MINUTE", "2")
-
-	srv := newServer(t)
-	srv.SetupRoutes()
-
-	post := func() int {
-		rec := httptest.NewRecorder()
-		req := httptest.NewRequestWithContext(t.Context(),
-			http.MethodPost, "/api/v1/reports",
-			strings.NewReader(`{"clientId":"c1","hosts":[]}`),
-		)
-		srv.ServeHTTP(rec, req)
-
-		return rec.Code
-	}
-
-	for i := range 2 {
-		if code := post(); code != http.StatusOK {
-			t.Fatalf("report %d: status = %d, want %d",
-				i+1, code, http.StatusOK)
-		}
-	}
-
-	if code := post(); code != http.StatusTooManyRequests {
-		t.Fatalf("third report in a minute: status = %d, want %d",
-			code, http.StatusTooManyRequests)
-	}
-}
-
-// TestCORSAllowedOriginsReachTheRouter checks that an origin listed in
-// CORS_ALLOWED_ORIGINS is allowed by the router, not only when handed
-// to the CORS middleware directly.
-func TestCORSAllowedOriginsReachTheRouter(t *testing.T) {
-	const origin = "https://netwatch.example:8443"
-
-	t.Setenv("CORS_ALLOWED_ORIGINS", origin)
-
-	srv := newServer(t)
-	srv.SetupRoutes()
-
-	// The preflight a browser sends before it POSTs JSON from origin.
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodOptions, "/api/v1/reports", http.NoBody)
-	req.Header.Set("Origin", origin)
-	req.Header.Set("Access-Control-Request-Method", http.MethodPost)
-	req.Header.Set("Access-Control-Request-Headers", "content-type")
-	srv.ServeHTTP(rec, req)
-
-	got := rec.Header().Get("Access-Control-Allow-Origin")
-	if got != origin {
-		t.Fatalf("Access-Control-Allow-Origin = %q, want %q", got, origin)
-	}
-}
-
-// TestHealthCheckRejectsOversizeBody sends the health check, which
-// never reads its body, a body one byte over the limit. Only the
-// router-wide body limit can reject it.
-func TestHealthCheckRejectsOversizeBody(t *testing.T) {
-	t.Parallel()
-
-	srv := newServer(t)
-	srv.SetupRoutes()
-
-	rec := httptest.NewRecorder()
-	req := httptest.NewRequestWithContext(t.Context(),
-		http.MethodGet, "/.well-known/healthcheck",
-		strings.NewReader(
-			strings.Repeat("x", int(server.MaxRequestBodyBytes)+1),
-		),
-	)
-
-	srv.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusRequestEntityTooLarge {
-		t.Fatalf("status = %d, want %d",
-			rec.Code, http.StatusRequestEntityTooLarge)
-	}
-
-	if got := rec.Body.String(); got != "{\"status\":\"error\"}\n" {
-		t.Errorf("body = %q, want %q", got, "{\"status\":\"error\"}\n")
-	}
-
-	got := rec.Header().Get("Content-Type")
-	if got != "application/json; charset=utf-8" {
-		t.Errorf("Content-Type = %q, want a JSON content type", got)
-	}
-}

backend/internal/server/server.go

@@ -1,14 +1,16 @@
 // Package server provides the HTTP server lifecycle,
-// including startup, routing, and graceful shutdown. The
+// including startup, routing, signal handling, and graceful
-// process lifetime is owned by fx: shutdown is requested
+// shutdown.
-// through fx.Shutdowner so every component's OnStop hook runs
-// in dependency order.
 package server
 
 import (
 	"context"
 	"log/slog"
 	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
 
 	"sneak.berlin/go/netwatch/internal/config"
 	"sneak.berlin/go/netwatch/internal/globals"
@@ -29,18 +31,19 @@ type Params struct {
 	Handlers   *handlers.Handlers
 	Logger     *logger.Logger
 	Middleware *middleware.Middleware
-	Shutdowner fx.Shutdowner
 }
 
 // Server is the top-level HTTP server orchestrator.
 type Server struct {
+	cancelFunc  context.CancelFunc
+	exitCode    int
 	h           *handlers.Handlers
 	httpServer  *http.Server
 	log         *slog.Logger
 	mw          *middleware.Middleware
 	params      Params
 	router      *chi.Mux
-	shutdowner fx.Shutdowner
+	startupTime time.Time
 }
 
 // New creates a Server and registers lifecycle hooks for
@@ -54,25 +57,23 @@ func New(
 	s.mw = params.Middleware
 	s.h = params.Handlers
 	s.log = params.Logger.Get()
-	s.shutdowner = params.Shutdowner
 
 	lc.Append(fx.Hook{
 		OnStart: func(_ context.Context) error {
-			// Build the router and http.Server synchronously
+			s.startupTime = time.Now().UTC()
-			// here, before spawning the serving goroutine, so
-			// httpServer is fully constructed by the time OnStop
-			// (or an early signal) can read it. fx guarantees
-			// OnStart returns before OnStop runs, so no
-			// synchronization or nil check is needed at shutdown.
-			s.SetupRoutes()
-			s.httpServer = s.newHTTPServer()
 
-			go s.listenAndServe()
+			go func() { //nolint:contextcheck // fx OnStart ctx is startup-only; run() creates its own
+				s.run()
+			}()
 
 			return nil
 		},
-		OnStop: func(ctx context.Context) error {
+		OnStop: func(_ context.Context) error {
-			return s.shutdown(ctx)
+			if s.cancelFunc != nil {
+				s.cancelFunc()
+			}
+
+			return nil
 		},
 	})
 
@@ -87,17 +88,60 @@ func (s *Server) ServeHTTP(
 	s.router.ServeHTTP(w, r)
 }
 
-// shutdown gracefully stops the HTTP server within the
+func (s *Server) run() {
-// deadline of the context fx provides for OnStop.
+	exitCode := s.serve()
-func (s *Server) shutdown(ctx context.Context) error {
+	os.Exit(exitCode)
-	err := s.httpServer.Shutdown(ctx)
+}
-	if err != nil {
-		s.log.Error("server clean shutdown failed", "error", err)
 
-		return err
+func (s *Server) serve() int {
+	var ctx context.Context //nolint:wsl // ctx must be declared before multi-assign
+
+	ctx, s.cancelFunc = context.WithCancel(
+		context.Background(),
+	)
+
+	go func() {
+		c := make(chan os.Signal, 1)
+
+		signal.Ignore(syscall.SIGPIPE)
+		signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+
+		sig := <-c
+		s.log.Info("signal received", "signal", sig)
+
+		if s.cancelFunc != nil {
+			s.cancelFunc()
+		}
+	}()
+
+	go func() {
+		s.serveUntilShutdown()
+	}()
+
+	<-ctx.Done()
+	s.cleanShutdown()
+
+	return s.exitCode
+}
+
+const shutdownTimeout = 5 * time.Second
+
+func (s *Server) cleanShutdown() {
+	s.exitCode = 0
+
+	ctxShutdown, shutdownCancel := context.WithTimeout(
+		context.Background(),
+		shutdownTimeout,
+	)
+	defer shutdownCancel()
+
+	err := s.httpServer.Shutdown(ctxShutdown)
+	if err != nil {
+		s.log.Error(
+			"server clean shutdown failed",
+			"error", err,
+		)
 	}
 
 	s.log.Info("server stopped")
-
-	return nil
 }

backend/script/build

@@ -1,21 +0,0 @@
-#!/bin/sh
-# script/build: compile the static netwatch-server binary into the
-# backend project root, with its version and architecture stamped in.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-
-    # VERSION comes from the environment (the root Dockerfile passes its
-    # ARG VERSION in). Unset or empty, it is git describe, or "dev" where
-    # there is no git or no repository history.
-    version="${VERSION:-$(git describe --always --dirty 2>/dev/null || echo dev)}"
-
-    CGO_ENABLED=0 go build -trimpath \
-        -ldflags "-s -w -X main.Version=$version -X main.Buildarch=$(uname -m)" \
-        -o netwatch-server ./cmd/netwatch-server/
-}
-
-main "$@"

backend/script/clean

@@ -1,12 +0,0 @@
-#!/bin/sh
-# script/clean: remove build artifacts.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    rm -f netwatch-server
-}
-
-main "$@"

backend/script/fmt

@@ -1,12 +0,0 @@
-#!/bin/sh
-# script/fmt: format the Go sources (writes).
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    go fmt ./...
-}
-
-main "$@"

backend/script/fmt-check

@@ -1,18 +0,0 @@
-#!/bin/sh
-# script/fmt-check: check Go formatting (read-only). Same scope as
-# script/fmt, but fails instead of writing.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    unformatted="$(gofmt -l .)"
-    if [ -n "$unformatted" ]; then
-        echo "Files not formatted:" >&2
-        echo "$unformatted" >&2
-        exit 1
-    fi
-}
-
-main "$@"

backend/script/lint

@@ -1,32 +0,0 @@
-#!/bin/sh
-# script/lint: run golangci-lint over the backend. This runs inside the
-# lint stage of the root Dockerfile, whose digest-pinned golangci-lint
-# image provides the linter; nothing installs golangci-lint on the host.
-# From a checkout, run `make lint` at the repo root, which builds that
-# stage.
-#
-# .golangci.yml is standardized org-wide and must never be edited here
-# (REPO_POLICIES.md). Its last silent drift replaced the v2 schema with
-# v1 keys, which left every threshold in the file inert while the build
-# stayed green. So the file is first checked against the canonical
-# copy's sha256: a local comparison, no network, nothing unpinned.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-GOLANGCI_CONFIG_SHA256="021cc83f4e6fc7c31b95b34b846723dfcf20b66b7baeea1dc40406e643346bcb"
-
-main() {
-    cd "$ROOT"
-    actual="$(sha256sum .golangci.yml | cut -d' ' -f1)"
-    if [ "$actual" != "$GOLANGCI_CONFIG_SHA256" ]; then
-        echo ".golangci.yml has drifted from the org standard." >&2
-        echo "  expected $GOLANGCI_CONFIG_SHA256" >&2
-        echo "  actual   $actual" >&2
-        echo "Restore it verbatim from sneak/prompts; do not edit it." >&2
-        exit 1
-    fi
-    golangci-lint run ./...
-}
-
-main "$@"

backend/script/run

@@ -1,13 +0,0 @@
-#!/bin/sh
-# script/run: build and run netwatch-server locally.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    "$ROOT/script/build"
-    exec ./netwatch-server "$@"
-}
-
-main "$@"

backend/script/test

@@ -1,12 +0,0 @@
-#!/bin/sh
-# script/test: run the backend test suite.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    timeout 30 go test ./...
-}
-
-main "$@"

bin/entrypoint.sh

@@ -1,59 +0,0 @@
-#!/bin/sh
-# The container's entrypoint: runs netwatch-server and nginx side by
-# side. TERM or INT stops both, and the container exits 0 if both exit
-# cleanly. If either exits on its own, the other is stopped too and the
-# container exits non-zero, so the platform restarts it instead of
-# leaving it half up.
-#
-# No set -e: kill and wait return non-zero here in normal operation.
-set -u
-
-# A stop signal is only noted here; the loop below acts on it.
-stop_requested=""
-trap 'stop_requested=yes' TERM INT
-
-# netwatch-server runs as the netwatch user and listens on loopback
-# only, on a port other than the public one; nginx.conf proxies to this
-# address. The netwatch user has no login shell, hence -s /bin/sh.
-# busybox su replaces itself with the command instead of staying on as
-# its parent, so $! is the server's own PID.
-BIND_ADDRESS=127.0.0.1 PORT=8081 \
-    su -s /bin/sh netwatch -c 'exec netwatch-server' &
-backend=$!
-
-# nginx starts through the nginx image's own entrypoint, which applies
-# the image's start-up configuration and then replaces itself with
-# nginx.
-/docker-entrypoint.sh nginx -g 'daemon off;' &
-nginx=$!
-
-running() {
-    kill -0 "$1" 2>/dev/null
-}
-
-# POSIX sh cannot wait for whichever of two children exits first, so
-# look once a second. The shell collects a child that has exited while
-# it runs sleep, and running() is false for that child from then on.
-while [ -z "$stop_requested" ] && running "$backend" && running "$nginx"; do
-    sleep 1
-done
-
-# Stop both, then wait until neither is left.
-kill -TERM "$backend" "$nginx" 2>/dev/null
-while running "$backend" || running "$nginx"; do
-    sleep 1
-done
-
-wait "$backend"
-backend_status=$?
-wait "$nginx"
-nginx_status=$?
-echo "entrypoint: netwatch-server exited $backend_status," \
-    "nginx exited $nginx_status"
-
-# Success is a requested stop that both processes exited cleanly from.
-if [ -n "$stop_requested" ] && [ "$backend_status" -eq 0 ] &&
-    [ "$nginx_status" -eq 0 ]; then
-    exit 0
-fi
-exit 1

nginx.conf

@@ -25,23 +25,4 @@ server {
         expires 1y;
         add_header Cache-Control "public, immutable";
     }
-
-    # netwatch-server, the Go backend, runs in the same container and
-    # listens on loopback only: bin/entrypoint.sh starts it on
-    # 127.0.0.1:8081. These headers go with every request passed to it.
-    # X-Forwarded-For carries only the client address, as resolved by
-    # the real IP settings above, and not the chain the request came
-    # with: the backend takes the first entry, which a client can write.
-    proxy_set_header Host $host;
-    proxy_set_header X-Real-IP $remote_addr;
-    proxy_set_header X-Forwarded-For $remote_addr;
-    proxy_set_header X-Forwarded-Proto $scheme;
-
-    location /api/ {
-        proxy_pass http://127.0.0.1:8081;
-    }
-
-    location = /.well-known/healthcheck {
-        proxy_pass http://127.0.0.1:8081;
-    }
 }

package.json

@@ -14,7 +14,6 @@
         "autoprefixer": "^10.4.23",
         "postcss": "^8.5.6",
         "prettier": "^3.8.1",
-        "puppeteer-core": "25.5.0",
         "tailwindcss": "^4.1.18",
         "vite": "^7.3.1"
     }

script/bootstrap

@@ -5,18 +5,7 @@
 # or apk (detected in that order); assumes nothing is present. Node is
 # used directly if installed; otherwise it is installed at a pinned
 # version via nvm (installing nvm itself first, from a hash-verified
-# release archive, never curl | sh). Go, with its gofmt, is used
+# release archive, never curl | sh).
-# directly if it is at least the version backend/go.mod asks for;
-# otherwise the pinned Go release is installed from its hash-verified
-# archive.
-#
-# What this script installs outside the system package manager lives
-# under $HOME and is linked into ~/.local/bin, where make and the git
-# hook find it once that directory is on PATH. Nothing in ~/.local/bin
-# that this script did not create is ever replaced.
-#
-# golangci-lint is not installed: make lint runs it in Docker, which
-# this script does not install either.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
@@ -27,12 +16,6 @@ NVM_VERSION="0.40.3"
 # sha256 of https://github.com/nvm-sh/nvm/archive/refs/tags/v0.40.3.tar.gz
 NVM_SHA256="5f4d6aaa04a177dc93c985e31dbc411ab6b8c6e1e21d8015dbc1372625fcd1d0"
 YARN_VERSION="1.22.22"
-# The Go inside the golang:1.25-alpine image Dockerfile builds the
-# backend with, 2026-08-09. The archive hashes are in ensure_go.
-GO_VERSION="1.25.7"
-
-BIN_DIR="$HOME/.local/bin"
-TOOLCHAIN="$HOME/.local/share/$("$ROOT/script/projectname")/toolchain"
 
 PKGMGR=""
 SUDO=""
@@ -96,26 +79,6 @@ verify_sha256() {
     fi
 }
 
-# link_bin <target> <name>: make an installed tool reachable as
-# $BIN_DIR/<name>. Only a symlink this script made, one pointing into
-# $TOOLCHAIN or ~/.nvm, is ever replaced; if anything else is already
-# there, bootstrap stops.
-link_bin() {
-    link="$BIN_DIR/$2"
-    if [ -L "$link" ] || [ -e "$link" ]; then
-        case "$(readlink "$link" || true)" in
-            "$TOOLCHAIN"/* | "$HOME"/.nvm/*) ;;
-            *)
-                echo "bootstrap: $link was not created by this script;" >&2
-                echo "  remove or rename it, then re-run bootstrap" >&2
-                exit 1
-                ;;
-        esac
-    fi
-    mkdir -p "$BIN_DIR"
-    ln -sf "$1" "$link"
-}
-
 # nvm is a bash script; run a command in a bash with nvm loaded
 nvm_sh() {
     bash -c ". \"\$HOME/.nvm/nvm.sh\" && $*"
@@ -140,117 +103,39 @@ ensure_node() {
     if ! missing node; then return 0; fi
     ensure_nvm
     nvm_sh "nvm install $NODE_VERSION"
-    link_bin "$HOME/.nvm/versions/node/v$NODE_VERSION/bin/node" node
 }
 
-# ensure_yarn: corepack writes its shims (pnpm and yarnpkg as well as
-# yarn) into $TOOLCHAIN rather than next to itself, and the npm fallback
-# installs there too; only yarn is linked.
 ensure_yarn() {
     if ! missing yarn; then return 0; fi
-    shims="$TOOLCHAIN/corepack-shims"
-    mkdir -p "$shims"
     if ! missing corepack; then
-        corepack enable --install-directory "$shims"
+        corepack enable
         corepack prepare "yarn@$YARN_VERSION" --activate
     elif [ -s "$HOME/.nvm/nvm.sh" ]; then
-        nvm_sh "nvm use $NODE_VERSION >/dev/null && \
+        nvm_sh "nvm use $NODE_VERSION >/dev/null && corepack enable && \
-            corepack enable --install-directory \"$shims\" && \
             corepack prepare yarn@$YARN_VERSION --activate"
     else
-        npm install -g --prefix "$TOOLCHAIN/npm-global" "yarn@$YARN_VERSION"
+        npm install -g "yarn@$YARN_VERSION"
-        shims="$TOOLCHAIN/npm-global/bin"
     fi
-    link_bin "$shims/yarn" yarn
 }
 
-# go_ok: the go on PATH has its gofmt beside it (a Go release ships the
+install_js_deps() {
-# two together) and is at least the version backend/go.mod asks for.
+    if missing yarn && [ -s "$HOME/.nvm/nvm.sh" ]; then
-# GOTOOLCHAIN=local makes an older go fail here instead of fetching a
+        nvm_sh "nvm use $NODE_VERSION >/dev/null && cd \"$ROOT\" && \
-# newer toolchain for itself.
+            yarn install --frozen-lockfile"
-go_ok() {
+    else
-    if missing go; then return 1; fi
+        yarn install --frozen-lockfile
-    [ -x "$(dirname "$(command -v go)")/gofmt" ] || return 1
-    (cd "$ROOT/backend" && GOTOOLCHAIN=local go list -m >/dev/null 2>&1)
-}
-
-# ensure_go: unless go_ok, install GO_VERSION and link its go and gofmt.
-# They are linked on every run that needs them, so a deleted link is put
-# back, and the archive is unpacked again if either binary is missing.
-ensure_go() {
-    if go_ok; then return 0; fi
-    go_dir="$TOOLCHAIN/go-$GO_VERSION"
-    if [ ! -x "$go_dir/bin/go" ] || [ ! -x "$go_dir/bin/gofmt" ]; then
-        # sha256 of each archive, from https://go.dev/dl/?mode=json
-        case "$(uname -s)-$(uname -m)" in
-            Linux-x86_64)
-                plat="linux-amd64"
-                sha="12e6d6a191091ae27dc31f6efc630e3a3b8ba409baf3573d955b196fdf086005"
-                ;;
-            Linux-aarch64)
-                plat="linux-arm64"
-                sha="ba611a53534135a81067240eff9508cd7e256c560edd5d8c2fef54f083c07129"
-                ;;
-            Darwin-x86_64)
-                plat="darwin-amd64"
-                sha="bf5050a2152f4053837b886e8d9640c829dbacbc3370f913351eb0904cb706f5"
-                ;;
-            Darwin-arm64)
-                plat="darwin-arm64"
-                sha="ff18369ffad05c57d5bed888b660b31385f3c913670a83ef557cdfd98ea9ae1b"
-                ;;
-            *)
-                echo "bootstrap: no pinned Go release for this platform" >&2
-                exit 1
-                ;;
-        esac
-        if missing curl; then pkg_install curl curl curl curl; fi
-        mkdir -p "$TOOLCHAIN"
-        curl -fsSL -o "$go_dir.tar.gz" \
-            "https://go.dev/dl/go$GO_VERSION.$plat.tar.gz"
-        verify_sha256 "$go_dir.tar.gz" "$sha"
-        # Unpacked beside its final place and then moved there, so an
-        # interrupted run never leaves a partial Go that looks complete.
-        rm -rf "$go_dir.partial"
-        mkdir "$go_dir.partial"
-        tar -xzf "$go_dir.tar.gz" -C "$go_dir.partial" --strip-components=1
-        rm -rf "$go_dir" "$go_dir.tar.gz"
-        mv "$go_dir.partial" "$go_dir"
     fi
-    link_bin "$go_dir/bin/go" go
-    link_bin "$go_dir/bin/gofmt" gofmt
 }
 
 main() {
     cd "$ROOT"
 
-    # Tools linked on an earlier run count as installed, and tools linked
-    # on this run are found by the steps after it.
-    path_hint=""
-    case ":$PATH:" in
-        *":$BIN_DIR:"*) ;;
-        *) path_hint=yes ;;
-    esac
-    PATH="$BIN_DIR:$PATH"
-
     if missing make; then pkg_install gnumake make make make; fi
     if missing git; then pkg_install git git git git; fi
 
     ensure_node
     ensure_yarn
-    yarn install --frozen-lockfile
+    install_js_deps
-
-    ensure_go
-    (cd "$ROOT/backend" && go mod download)
-
-    if missing docker; then
-        echo "bootstrap: docker not found; make lint, and so make check" >&2
-        echo "  and the pre-commit hook, need it to run the Go linter" >&2
-    fi
-    if [ -n "$path_hint" ] && [ -d "$BIN_DIR" ]; then
-        echo "bootstrap: add $BIN_DIR to the front of your PATH, e.g." >&2
-        echo "  export PATH=\"\$HOME/.local/bin:\$PATH\"" >&2
-    fi
 
     echo "bootstrap complete"
 }

script/cibuild

@@ -1,15 +1,13 @@
 #!/bin/sh
-# script/cibuild: run the CI build: build the one image from Dockerfile,
+# script/cibuild: run the CI build. The Dockerfile runs make check, so
-# whose stages run the checks as build steps (the backend's fmt-check,
+# a successful build implies all checks pass.
-# lint and tests, and the frontend's test, lint and fmt-check). This is
-# the only build step the Gitea workflow runs.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    timeout 300 docker build .
+    docker build .
 }
 
 main "$@"

script/docker

@@ -1,8 +1,6 @@
 #!/bin/sh
 # script/docker: build the Docker image tagged with the project name.
-# Identical in all repos; the tag comes from script/projectname.
+# The tag comes from script/projectname.
-# --no-cache because the gate phases the final stage depends on are RUN
-# steps, and a cached one is a check that did not run.
 set -eu
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
@@ -10,16 +8,7 @@ ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    # Own line: a failing command substitution inside an argument does
+    timeout 300 docker build -t "$("$SCRIPT_DIR/projectname")" .
-    # not trip `set -e`, so the inline form degrades silently to an
-    # empty constant. VERSION is computed here because .dockerignore
-    # excludes .git, so `git describe` in a build stage yields an empty
-    # version without failing.
-    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
-    [ -n "$version" ] || version="unknown"
-    docker build --no-cache \
-        --build-arg VERSION="$version" \
-        -t "$("$SCRIPT_DIR/projectname")" .
 }
 
 main "$@"

script/fmt

@@ -1,14 +1,12 @@
 #!/bin/sh
-# script/fmt: format the whole repo (writes): prettier over everything
+# script/fmt: format all files (writes).
-# it understands, then gofmt over the Go backend.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    "$ROOT/script/frontend-fmt"
+    yarn prettier --write .
-    "$ROOT/backend/script/fmt"
 }
 
 main "$@"

script/fmt-check

@@ -1,14 +1,13 @@
 #!/bin/sh
-# script/fmt-check: check formatting across the whole repo (read-only).
+# script/fmt-check: check formatting (read-only). Same scope as
-# Same scope as script/fmt, but fails instead of writing.
+# script/fmt, but fails instead of writing.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    "$ROOT/script/frontend-fmt-check"
+    yarn prettier --check .
-    "$ROOT/backend/script/fmt-check"
 }
 
 main "$@"

script/frontend-check

@@ -1,18 +0,0 @@
-#!/bin/sh
-# script/frontend-check: run the frontend half of the checks only (test,
-# lint, fmt-check). This exists for the frontend stage of Dockerfile, a
-# node image with neither Go nor Docker; the Dockerfile's lint and
-# backend build stages gate the backend half. Everywhere else, use
-# script/check, which covers the whole repo. Must not modify any files.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    "$ROOT/script/frontend-test"
-    "$ROOT/script/frontend-lint"
-    "$ROOT/script/frontend-fmt-check"
-}
-
-main "$@"

script/frontend-fmt

@@ -1,14 +0,0 @@
-#!/bin/sh
-# script/frontend-fmt: format the frontend and every other file prettier
-# understands, repo-wide (writes). backend/ is in .prettierignore; Go
-# sources are formatted by backend/script/fmt.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    yarn prettier --write .
-}
-
-main "$@"

script/frontend-fmt-check

@@ -1,13 +0,0 @@
-#!/bin/sh
-# script/frontend-fmt-check: check prettier formatting (read-only). Same
-# scope as script/frontend-fmt, but fails instead of writing.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    yarn prettier --check .
-}
-
-main "$@"

script/frontend-lint

@@ -1,12 +0,0 @@
-#!/bin/sh
-# script/frontend-lint: run the frontend linter (prettier in check mode).
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    yarn prettier --check .
-}
-
-main "$@"

script/frontend-test

@@ -1,14 +0,0 @@
-#!/bin/sh
-# script/frontend-test: run the frontend test suite. The frontend has no
-# unit tests; the production build serves as the test (fails on broken
-# code).
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-main() {
-    cd "$ROOT"
-    timeout 30 yarn build
-}
-
-main "$@"

script/frontend-viewport-test

@@ -1,102 +0,0 @@
-#!/bin/sh
-# script/frontend-viewport-test: verify the responsive layout of the built
-# frontend in a real browser engine.
-#
-# Builds dist/, serves it with the same nginx image and the same nginx.conf
-# the shipping container uses, points a containerised headless Chrome at it
-# over CDP, and asserts on computed layout at every viewport width derived
-# from the app's own CSS. See test/viewport/README.md for what this covers
-# and what it cannot.
-#
-# Deliberately not part of script/check: it needs Docker and takes far
-# longer than the 20s budget make test has to stay inside.
-set -eu
-
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
-
-# chromedp/headless-shell 151.0.7922.109, 2026-08-09
-BROWSER_IMAGE="chromedp/headless-shell@sha256:2d349b544a1ea6b5b5fd7c0fe99215ff662339c57407ee2e8c0a11af93516b04"
-# nginx:stable-alpine, 2026-02-22 (the digest Dockerfile ships)
-SERVER_IMAGE="nginx@sha256:15e96e59aa3b0aada3a121296e3bce117721f42d88f5f64217ef4b18f458c6ab"
-# node:22-alpine, 2026-02-22 (the digest Dockerfile builds with)
-NODE_IMAGE="node@sha256:e4bf2a82ad0a4037d28035ae71529873c069b13eb0455466ae0bc13363826e34"
-
-RUN_ID="$$-$(date +%s)"
-NETWORK="netwatch-viewport-$RUN_ID"
-SERVER="netwatch-viewport-server-$RUN_ID"
-BROWSER="netwatch-viewport-browser-$RUN_ID"
-HARNESS="netwatch-viewport-harness-$RUN_ID"
-ARTIFACT_DIR="$ROOT/tmp/viewport"
-
-# Every container is named and removed here, including the harness itself:
-# `timeout` below kills the `docker run` client, not the container it
-# started, and an unnamed survivor keeps the --internal network in use so
-# `docker network rm` fails too. This host runs many sessions at once and
-# neither may be left behind.
-cleanup() {
-    docker rm -f "$HARNESS" > /dev/null 2>&1 || true
-    docker rm -f "$BROWSER" > /dev/null 2>&1 || true
-    docker rm -f "$SERVER" > /dev/null 2>&1 || true
-    docker network rm "$NETWORK" > /dev/null 2>&1 || true
-}
-trap cleanup EXIT INT TERM
-
-main() {
-    cd "$ROOT"
-
-    # Test what ships: the production build, not a dev server.
-    "$ROOT/script/frontend-test"
-    if [ ! -f "$ROOT/dist/index.html" ]; then
-        echo "frontend-viewport-test: dist/index.html missing after build" >&2
-        exit 1
-    fi
-
-    mkdir -p "$ARTIFACT_DIR"
-
-    # An --internal network has no route off the host, so the browser
-    # cannot reach the real internet no matter what the page asks for.
-    # Latency probes are answered by the harness instead. This also means
-    # no port can be published from it, which is why the harness itself
-    # runs as a third container on the same network rather than on the
-    # host.
-    docker network create --internal "$NETWORK" > /dev/null
-
-    docker run -d --rm --name "$SERVER" \
-        --network "$NETWORK" --network-alias netwatch \
-        -v "$ROOT/dist:/usr/share/nginx/html:ro" \
-        -v "$ROOT/nginx.conf:/etc/nginx/conf.d/default.conf:ro" \
-        "$SERVER_IMAGE" > /dev/null
-
-    # The image's own entrypoint already exposes CDP on 9222 and passes
-    # --no-sandbox, so only extra flags belong here; re-specifying the
-    # debugging port collides with it and leaves the endpoint bound to
-    # loopback only. --hide-scrollbars keeps innerWidth equal to
-    # clientWidth, so the overflow assertion has no scrollbar-sized slack
-    # to hide behind, and matches the overlay scrollbars phones use.
-    docker run -d --rm --name "$BROWSER" --init --shm-size=1g \
-        --network "$NETWORK" \
-        "$BROWSER_IMAGE" \
-        --hide-scrollbars \
-        > /dev/null
-
-    # Chrome refuses DevTools requests whose Host header is neither
-    # localhost nor an IP address, so dial the container by address rather
-    # than by its network alias.
-    browser_ip="$(docker inspect \
-        -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' \
-        "$BROWSER")"
-
-    timeout 900 docker run --rm --init --name "$HARNESS" \
-        --network "$NETWORK" \
-        --user "$(id -u):$(id -g)" \
-        -v "$ROOT:/app" \
-        -w /app \
-        -e NETWATCH_ROOT=/app \
-        -e NETWATCH_BASE_URL=http://netwatch:8080 \
-        -e "NETWATCH_CDP_URL=http://$browser_ip:9222" \
-        -e NETWATCH_ARTIFACT_DIR=/app/tmp/viewport \
-        "$NODE_IMAGE" \
-        node test/viewport/harness.js
-}
-
-main "$@"

script/lint

@@ -1,21 +1,12 @@
 #!/bin/sh
-# script/lint: lint the whole repo: prettier over the frontend, then the
+# script/lint: run the linter (prettier in check mode).
-# Go linter over backend/.
-#
-# The Go linter runs only in Docker: this builds the lint stage of
-# Dockerfile, the digest-pinned golangci-lint image, which runs the
-# backend's fmt-check and lint targets. --no-cache makes the linter
-# really run every time rather than reuse an earlier result, and the
-# stage is built for its checks alone, so no image is kept.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    "$ROOT/script/frontend-lint"
+    yarn prettier --check .
-    timeout 300 docker build --no-cache --target lint \
-        --output type=cacheonly .
 }
 
 main "$@"

script/test

@@ -1,14 +1,13 @@
 #!/bin/sh
-# script/test: run the test suite for the whole repo: the frontend at
+# script/test: run the test suite. This repo has no unit tests; the
-# the repo root, then the Go backend in backend/. Both halves together
+# production build serves as the test (fails on broken code).
-# get 30 seconds; each also keeps its own limit for the Dockerfiles.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    timeout 30 sh -c 'script/frontend-test && backend/script/test'
+    timeout 30 yarn build
 }
 
 main "$@"

src/main.js

@@ -7,11 +7,9 @@ import "./styles.css";
 // graphMaxLatency — values above it pin to the top of the chart but still
 // display their real value in the latency figure. The history buffer holds
 // maxHistoryPoints samples (historyDuration / updateInterval).
-// reportInterval is how often collected samples are POSTed to the backend.
 const CONFIG = {
     updateInterval: 3000,
     maxHistoryPoints: 100,
-    reportInterval: 60000,
     get historyDuration() {
         return (this.maxHistoryPoints * this.updateInterval) / 1000;
     },
@@ -348,159 +346,6 @@ class AppState {
     }
 }
 
-// --- Reporting ---------------------------------------------------------------
-
-// A random UUIDv4. `crypto.randomUUID` exists only in secure contexts
-// (HTTPS or localhost); over plain HTTP to any other host — the normal LAN
-// deployment — it is undefined, so feature-detect it and otherwise build the
-// id from `crypto.getRandomValues`, which is available in insecure contexts.
-function randomId() {
-    if (typeof crypto !== "undefined" && crypto.randomUUID) {
-        return crypto.randomUUID();
-    }
-    const bytes = new Uint8Array(16);
-    crypto.getRandomValues(bytes);
-    bytes[6] = (bytes[6] & 0x0f) | 0x40; // version 4
-    bytes[8] = (bytes[8] & 0x3f) | 0x80; // variant 1
-    const hex = [...bytes].map((b) => b.toString(16).padStart(2, "0"));
-    return (
-        hex.slice(0, 4).join("") +
-        "-" +
-        hex.slice(4, 6).join("") +
-        "-" +
-        hex.slice(6, 8).join("") +
-        "-" +
-        hex.slice(8, 10).join("") +
-        "-" +
-        hex.slice(10, 16).join("")
-    );
-}
-
-// A random id identifying this browser across reports. Generated once and
-// kept in localStorage; if storage is unavailable (e.g. private mode) a
-// fresh id is used for this session only.
-function getClientId() {
-    const key = "netwatch-client-id";
-    try {
-        let id = localStorage.getItem(key);
-        if (!id) {
-            id = randomId();
-            localStorage.setItem(key, id);
-        }
-        return id;
-    } catch {
-        return randomId();
-    }
-}
-
-// Build the delta report body the backend decodes, plus the new per-host
-// high-water marks. Pure function of the passed state: `hosts` is an array
-// of { name, url, status, history }, `since` maps a host url to the Unix-ms
-// timestamp of the last sample already reported for it, and `now` is a Date.
-// Only non-paused samples newer than the mark are included. Returns null
-// when no host has an unreported sample.
-export function buildReport(hosts, clientId, now, since) {
-    const reportHosts = [];
-    const marks = new Map();
-    for (const host of hosts) {
-        const mark = since.get(host.url) ?? 0;
-        const samples = [];
-        let high = mark;
-        for (const p of host.history) {
-            if (p.paused) continue;
-            if (p.timestamp <= mark) continue;
-            samples.push({
-                t: p.timestamp,
-                latency: p.latency,
-                error: p.error ?? null,
-            });
-            if (p.timestamp > high) high = p.timestamp;
-        }
-        if (samples.length === 0) continue;
-        reportHosts.push({
-            name: host.name,
-            url: host.url,
-            status: host.status,
-            history: samples,
-        });
-        marks.set(host.url, high);
-    }
-    if (reportHosts.length === 0) return null;
-    return {
-        body: {
-            clientId,
-            geo: null,
-            hosts: reportHosts,
-            timestamp: now.toISOString(),
-        },
-        marks,
-    };
-}
-
-// Periodically POSTs unreported samples to the same-origin backend. Holds
-// the per-host high-water marks so each report is a delta; marks only
-// advance on a delivered report, so a failed POST simply re-sends those
-// samples next interval (bounded by the history window — whatever has since
-// fallen out is dropped). Failure is quiet: one debug line per outage, one
-// on recovery, never an alert, never a tight retry loop.
-//
-// Only one report is ever in flight, and it is abandoned after half the
-// interval, so a slow POST can neither overlap the next report (which would
-// carry the same samples) nor stall reporting for good.
-class Reporter {
-    constructor(state, clientId, intervalMs) {
-        this.state = state;
-        this.clientId = clientId;
-        this.intervalMs = intervalMs;
-        this.marks = new Map();
-        this.failing = false;
-        this.sending = false;
-        this.timerId = null;
-    }
-
-    start() {
-        if (this.timerId) return;
-        this.timerId = setInterval(() => this.flush(), this.intervalMs);
-    }
-
-    async flush() {
-        if (this.sending || this.state.paused) return;
-        const report = buildReport(
-            this.state.allHosts,
-            this.clientId,
-            new Date(),
-            this.marks,
-        );
-        if (!report) return;
-        this.sending = true;
-        try {
-            const resp = await fetch("/api/v1/reports", {
-                method: "POST",
-                headers: { "Content-Type": "application/json" },
-                credentials: "omit",
-                body: JSON.stringify(report.body),
-                signal: AbortSignal.timeout(this.intervalMs / 2),
-            });
-            if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
-            for (const [url, t] of report.marks) {
-                const current = this.marks.get(url) ?? 0;
-                this.marks.set(url, Math.max(current, t));
-            }
-            if (this.failing) {
-                log.debug("Report delivery recovered");
-                this.failing = false;
-            }
-        } catch (err) {
-            if (!this.failing) {
-                log.debug(`Report delivery failed: ${err.message}`);
-                this.failing = true;
-            }
-        } finally {
-            this.sending = false;
-        }
-    }
-}
-
 // --- Latency Measurement -----------------------------------------------------
 
 async function measureLatency(url) {
@@ -692,12 +537,6 @@ class SparklineRenderer {
 
 // --- UI Renderer -------------------------------------------------------------
 
-// The per-host status line must stay wrappable: its populated content is
-// wider than the host column at a 320px viewport, and `whitespace-nowrap`
-// here overflows the element and forces the whole document to scroll
-// horizontally.
-const STATUS_TEXT_CLASS = "status-text text-xs text-right col-span-2 mt-5";
-
 function hostRowHTML(host, index, showPin = true) {
     const pinColor = host.pinned
         ? "text-blue-500"
@@ -723,7 +562,7 @@ function hostRowHTML(host, index, showPin = true) {
             <span class="text-gray-500">---</span>
           </div>
           <a href="${host.url}" target="_blank" rel="noopener" class="text-xs text-gray-500 truncate block col-span-2 -mt-2">${host.url}</a>
-          <div class="${STATUS_TEXT_CLASS} text-gray-500" data-host="${index}">waiting...</div>
+          <div class="status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5" data-host="${index}">waiting...</div>
         </div>
         <div class="flex-grow sparkline-container rounded overflow-hidden border border-gray-700/30">
           <canvas class="sparkline-canvas w-full" data-host="${index}" height="${CONFIG.canvasHeight}"></canvas>
@@ -832,7 +671,7 @@ function buildUI(state) {
         </p>
         <p class="mt-2"><a href="https://git.eeqj.de/sneak/netwatch/commit/${__COMMIT_FULL__}" target="_blank" rel="noopener" class="text-gray-600 hover:text-gray-400">${__COMMIT_HASH__}</a></p>
         <p class="mt-2">
-          <label class="debug-toggle-label cursor-pointer">
+          <label class="cursor-pointer">
             <input type="checkbox" id="debug-toggle" class="mr-1">
             <span>Debug log</span>
           </label>
@@ -849,26 +688,6 @@ function buildUI(state) {
 
 // --- UI Updaters -------------------------------------------------------------
 
-// Renders `min 1ms / med 2ms / avg 3ms / max 4ms`. Each label, value and
-// trailing separator is one unbreakable unit, so wrapping only ever happens
-// between stats and a wrapped line never starts with a separator.
-function statusStatsHTML(stats) {
-    return stats
-        .map(([label, value], i) => {
-            const sep =
-                i < stats.length - 1
-                    ? ` <span class="text-gray-500">/</span>`
-                    : "";
-            return (
-                `<span class="whitespace-nowrap">` +
-                `<span class="text-gray-400">${label} </span>` +
-                `<span class="${latencyClass(value, "online")}">${value}ms</span>` +
-                `${sep}</span>`
-            );
-        })
-        .join(" ");
-}
-
 function updateHostRow(host, index) {
     const latencyEl = document.querySelector(
         `.latency-value[data-host="${index}"]`,
@@ -893,22 +712,28 @@ function updateHostRow(host, index) {
     const min = host.minLatency();
     const max = host.maxLatency();
     if (host.status === "online" && avg !== null) {
-        statusEl.innerHTML = statusStatsHTML([
+        statusEl.innerHTML =
-            ["min", min],
+            `<span class="text-gray-400">min </span><span class="${latencyClass(min, "online")}">${min}ms</span>` +
-            ["med", med],
+            ` <span class="text-gray-500">/</span> ` +
-            ["avg", avg],
+            `<span class="text-gray-400">med </span><span class="${latencyClass(med, "online")}">${med}ms</span>` +
-            ["max", max],
+            ` <span class="text-gray-500">/</span> ` +
-        ]);
+            `<span class="text-gray-400">avg </span><span class="${latencyClass(avg, "online")}">${avg}ms</span>` +
-        statusEl.className = STATUS_TEXT_CLASS;
+            ` <span class="text-gray-500">/</span> ` +
+            `<span class="text-gray-400">max </span><span class="${latencyClass(max, "online")}">${max}ms</span>`;
+        statusEl.className =
+            "status-text text-xs whitespace-nowrap text-right col-span-2 mt-5";
     } else if (host.status === "offline") {
         statusEl.textContent = "unreachable";
-        statusEl.className = `${STATUS_TEXT_CLASS} text-red-400`;
+        statusEl.className =
+            "status-text text-xs text-red-400 whitespace-nowrap text-right col-span-2 mt-5";
     } else if (host.status === "error") {
         statusEl.textContent = "timeout";
-        statusEl.className = `${STATUS_TEXT_CLASS} text-orange-400`;
+        statusEl.className =
+            "status-text text-xs text-orange-400 whitespace-nowrap text-right col-span-2 mt-5";
     } else {
         statusEl.textContent = "connecting...";
-        statusEl.className = `${STATUS_TEXT_CLASS} text-gray-500`;
+        statusEl.className =
+            "status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5";
     }
 
     SparklineRenderer.draw(canvas, host.history);
@@ -1219,7 +1044,8 @@ function greyOutUI(state) {
         }
         if (statusEl) {
             statusEl.textContent = "paused";
-            statusEl.className = `${STATUS_TEXT_CLASS} text-gray-500`;
+            statusEl.className =
+                "status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5";
         }
         // Grey out the status dot
         const row = document.querySelector(`.host-row[data-index="${i}"]`);
@@ -1300,11 +1126,46 @@ function handleResize(state) {
     });
 }
 
+// --- Mobile Detection --------------------------------------------------------
+
+const MOBILE_BREAKPOINT = 768;
+
+function isMobileViewport() {
+    return window.innerWidth < MOBILE_BREAKPOINT;
+}
+
+function buildMobileUI() {
+    const app = document.getElementById("app");
+    app.innerHTML = `
+    <div class="mx-auto px-[5%] py-8">
+      <header class="mb-8">
+        <h1 class="text-3xl font-bold text-white"><a href="https://git.eeqj.de/sneak/netwatch" target="_blank" rel="noopener" class="underline decoration-dashed decoration-gray-500 underline-offset-4">NetWatch</a> by <a href="https://sneak.berlin" target="_blank" rel="noopener" class="text-blue-400 underline hover:text-blue-300">@sneak</a></h1>
+        <p class="text-gray-400 text-sm mt-2">Real-time network latency monitor</p>
+      </header>
+      <div class="flex items-center justify-center min-h-[60vh]">
+        <div class="bg-gray-800/70 border border-gray-700/50 rounded-lg p-8 max-w-md text-center">
+          <p class="text-4xl mb-4">📡</p>
+          <p class="text-xl font-semibold text-white mb-2">Not yet available on mobile</p>
+          <p class="text-gray-400 text-sm">NetWatch requires a wider viewport to display latency charts and monitoring data. Please visit on a desktop browser.</p>
+        </div>
+      </div>
+      <footer class="mt-8 text-center text-gray-600 text-xs">
+        <p><a href="https://git.eeqj.de/sneak/netwatch/commit/${__COMMIT_FULL__}" target="_blank" rel="noopener" class="text-gray-600 hover:text-gray-400">${__COMMIT_HASH__}</a></p>
+      </footer>
+    </div>`;
+}
+
 // --- Bootstrap ---------------------------------------------------------------
 
 async function init() {
     log.info("NetWatch starting");
 
+    if (isMobileViewport()) {
+        log.info("Mobile viewport detected — skipping monitoring");
+        buildMobileUI();
+        return;
+    }
+
     // Probe common gateway IPs to find the local router
     const gateway = await detectGateway();
     const localHosts = [LOCAL_CPE];
@@ -1317,19 +1178,6 @@ async function init() {
     buildUI(state);
     log.info("UI built, starting tick loop");
 
-    // Reporting is best-effort: any failure setting it up (e.g. no usable
-    // crypto for the client id) must never stop the monitor from probing.
-    try {
-        const reporter = new Reporter(
-            state,
-            getClientId(),
-            CONFIG.reportInterval,
-        );
-        reporter.start();
-    } catch (err) {
-        log.error(`Reporting disabled: ${err.message}`);
-    }
-
     document
         .getElementById("pause-btn")
         .addEventListener("click", () => togglePause(state));
@@ -1442,13 +1290,8 @@ async function init() {
     setTimeout(() => handleResize(state), 100);
 }
 
-// Bootstrap only when loaded as the page: a real DOM containing the #app
+if (document.readyState === "loading") {
-// mount point this module renders into. Importing the module in a unit test
-// (which has no #app) runs nothing, so buildReport can be tested in isolation.
-if (typeof document !== "undefined" && document.getElementById("app")) {
-    if (document.readyState === "loading") {
     document.addEventListener("DOMContentLoaded", init);
-    } else {
+} else {
     init();
-    }
 }

src/styles.css

@@ -14,38 +14,6 @@ body {
         ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
 }
 
-/* ---- Minimum tap targets ----------------------------------------------
-   Every interactive control is at least 44x44 CSS px (Apple HIG, WCAG 2.2
-   SC 2.5.5). Not scoped to a breakpoint or to `pointer: coarse`: a large
-   phone in landscape is above the 768px breakpoint and still a touch
-   device. */
-
-/* The button grows to 44x44 while the negative margins keep its layout
-   footprint at the 16x16 of the icon inside it, so row height and the
-   icon's position are unchanged. */
-.pin-btn {
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    width: 2.75rem;
-    height: 2.75rem;
-    margin: -0.875rem;
-}
-
-/* A select paints its own background and border, so it has to actually be
-   44 tall rather than borrow the trick above. */
-#interval-select {
-    min-height: 2.75rem;
-}
-
-/* The tappable target for #debug-toggle is the label wrapping it. */
-.debug-toggle-label {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    min-height: 2.75rem;
-}
-
 .sparkline-container {
     background: linear-gradient(
         to bottom,
@@ -70,10 +38,9 @@ body {
         gap: 0.75rem;
     }
 
-    /* Pause button: smaller on mobile, but not below the tap-target floor */
+    /* Pause button: smaller on mobile */
     #pause-btn {
         padding: 0.5rem 1rem;
-        min-height: 2.75rem;
     }
 
     #pause-btn svg {

test/viewport/README.md

@@ -1,112 +0,0 @@
-# Responsive-layout harness
-
-Automated verification of the responsive layout that landed in #5. Run it with:
-
-```bash
-make frontend-viewport-test
-```
-
-It builds `dist/`, serves it from the same digest-pinned `nginx` image and the
-same `nginx.conf` the shipping container uses, drives a digest-pinned headless
-Chrome against it over CDP, and asserts on computed layout at every viewport
-width derived from the app's own CSS. Screenshots land in `tmp/viewport/`
-alongside a `results.json`; they are artifacts for a human to look at when
-something fails, not the evidence. The assertions are the evidence.
-
-The target is deliberately outside `make check`: it needs Docker and takes
-minutes, and `make test` has to stay under 20 seconds.
-
-## How the widths are chosen
-
-Not from a list of phone models. `viewports.js` parses the `@media` conditions
-out of `src/styles.css` and scans `src/main.js` and `index.html` for Tailwind
-responsive prefixes, then tests every breakpoint it finds at one pixel below it,
-exactly on it, and one pixel above it. A generic 375px "phone" test sails
-straight past an off-by-one at a media query boundary; `max-width: 768px`
-matches _at_ 768, and the sweep pins down which side of that line each layout is
-on.
-
-Nothing hardcodes 768. Add a second media block or start using `md:` classes and
-the new breakpoint is covered without this directory being touched. The app is
-desktop-first today (all narrow rules live in `max-width` blocks); a
-`min-width`-only, mobile-first set is handled as its inverse, and a set that
-mixes the two makes the run fail loudly rather than test the right widths with
-the wrong expectation. Four further viewports are fixed anchors, each with a
-stated reason: a 320px floor, a 1280px desktop baseline, and two phone-landscape
-sizes straddling the breakpoint for the rotation case.
-
-## What it asserts
-
-- **app-rendered** — enough host rows exist and enough of them show a numeric
-  latency. This one exists so the rest cannot pass vacuously against a blank
-  page.
-- **no-horizontal-overflow** — `documentElement.scrollWidth` fits the layout
-  viewport, with the widest offending element named.
-- **nothing-past-viewport-edge** — no visible element's box extends past the
-  viewport edge.
-- **no-clipped-text** — nothing hides text behind `overflow: hidden`. Deliberate
-  ellipsis truncation (Tailwind's `truncate`, used on host names and URLs) is
-  excluded: it is a design choice, not breakage.
-- **tap-targets-44px** — every interactive control is at least 44x44 CSS px on
-  touch viewports, _and_ each selector in the control list matched at least the
-  number of visible elements it declares. The second half is what stops the
-  check passing vacuously: with size alone, a renamed class would take its
-  controls out of the measured set and the check would report "all 0 controls
-  are at least 44x44" and pass. See below.
-- **host-rows-stacked / host-rows-side-by-side** — the rows genuinely reflow.
-  Computed `flex-direction` _and_ the actual geometry are checked, and in the
-  narrow layout the info block and the sparkline must each occupy essentially
-  the full row width. A row that merely shrank its 420px column would fail.
-- **probing-still-runs / gateway-detection-still-runs** — narrow viewports keep
-  probing and keep detecting the gateway. The mobile early-return path proposed
-  in #8 was rejected; this is what would catch it coming back.
-
-### The tap-target threshold
-
-44x44 CSS px. That is the figure in Apple's Human Interface Guidelines and in
-WCAG 2.2 SC 2.5.5 "Target Size (Enhanced)". WCAG 2.2 SC 2.5.8 (level AA) sets a
-lower 24x24 floor, but that floor comes with a spacing exception these controls
-do not qualify for — the pin buttons sit directly against the host name they
-belong to.
-
-## Determinism
-
-The browser container runs on an `--internal` docker network and has no route to
-the internet, so the app's latency probes cannot reach anything real. The
-harness answers them itself from a fixed delay table, with a deterministic
-fraction failed outright, so the rows render a realistic spread of one-, two-
-and three-digit latencies plus some unreachable rows. That spread is what the
-layout has to survive; 24 identical `---` placeholders would not exercise it.
-
-## What this cannot verify
-
-Real limits, so nobody re-parks this issue as needing hardware:
-
-- **Non-Chromium engines.** This is Chrome. iOS Safari is WebKit and cannot be
-  emulated by it; Safari-specific bugs (viewport units under a collapsing URL
-  bar, `-webkit-fill-available`, form control metrics) will not show up here.
-- **Real touch input.** `hasTouch` emulation changes what the page is told, not
-  how a finger behaves. Gesture handling, scroll momentum, double-tap zoom and
-  hover-state fallbacks on touch are out of scope.
-- **Physical pixel density and rendering.** `deviceScaleFactor` is set, but
-  subpixel antialiasing, OLED colour rendering and actual legibility at a given
-  physical size are not measurable here.
-- **Fonts.** The container has DejaVu, not the platform's own UI monospace. Text
-  metrics are therefore close to, but not identical to, a real device — a layout
-  that fits here by a few pixels might not there.
-- **On-device performance.** Canvas sparkline redraw cost, battery, and
-  behaviour on a slow radio are not measured.
-- **Browser chrome.** The address bar, safe-area insets and notch cutouts are
-  not simulated.
-
-Everything else this issue was actually about — does the layout reflow, does
-anything overflow, is content clipped, are the controls big enough — is a
-function of viewport width and CSS, and is covered above.
-
-## Relation to the unit test framework (#21)
-
-Complementary layers, not two stacks. `vitest` (#21) will exercise module-level
-logic in-process with no browser. This harness exercises rendered layout in a
-real engine and is the only thing here that can see a media query. Neither
-replaces the other; assertions about computed styles and element geometry belong
-here, assertions about functions belong in `vitest`.

test/viewport/checks.js

@@ -1,245 +0,0 @@
-// Pass/fail decisions for the responsive-layout harness.
-//
-// Kept in node rather than in the page so that a failure can be reported
-// with the measurements that produced it. Every check runs at every
-// viewport; none of them short-circuits, so one failure does not hide the
-// rest.
-
-// Minimum tap target, in CSS pixels. 44x44 is the figure in Apple's Human
-// Interface Guidelines and in WCAG 2.2 SC 2.5.5 "Target Size (Enhanced)".
-// WCAG 2.2 SC 2.5.8 (level AA) sets a lower 24x24 floor, but that floor
-// comes with a spacing exception these controls do not qualify for: the
-// pin buttons sit directly against the host name they belong to. Held at
-// 44 deliberately.
-export const MIN_TAP_TARGET_PX = 44;
-
-// The controls named in the definition of done, plus the pause button.
-// Each carries the smallest number of *visible* instances the page has to
-// contain for the tap-target oracle to be measuring anything at all.
-//
-// Without those floors the check is inert: `undersized` is empty both when
-// every control is large enough and when the selectors have gone stale and
-// matched nothing, and the pass condition cannot tell those apart. A single
-// combined floor would not be enough either — 26 pin buttons would cover
-// for all three singleton controls vanishing at once — so the floor is per
-// selector, and one stale selector out of four fails the check.
-export const INTERACTIVE_CONTROLS = [
-    { selector: "#pause-btn", minCount: 1 },
-    { selector: "#interval-select", minCount: 1 },
-    // One per pinnable host row. `app-rendered` already requires at least
-    // 10 host rows, so a count below that means the pin buttons stopped
-    // being rendered per row rather than that there were fewer hosts.
-    { selector: ".pin-btn", minCount: 10 },
-    { selector: "#debug-toggle", minCount: 1 },
-];
-
-export const INTERACTIVE_SELECTORS = INTERACTIVE_CONTROLS.map(
-    (control) => control.selector,
-);
-
-// A host row is only "reflowed" if it stacked *and* went full width.
-// A row that merely shrank its 420px info column would keep
-// flex-direction: row, and a row that stacked but left the info column at
-// its fixed width would fail the width test.
-const FULL_WIDTH_FRACTION = 0.9;
-
-function summarise(items, format, limit = 3) {
-    const shown = items.slice(0, limit).map(format).join("; ");
-    const rest = items.length > limit ? ` (+${items.length - limit} more)` : "";
-    return shown + rest;
-}
-
-// Collapse an overflow report to the elements actually responsible.
-// Identical elements (24 host rows all doing the same thing) are counted
-// rather than listed, and the deepest ones come first, since every
-// ancestor of an overflowing element also reports as overflowing.
-function deepestOffenders(entries) {
-    const byElement = new Map();
-    for (const entry of entries) {
-        const reach = entry.reach ?? entry.right;
-        const existing = byElement.get(entry.el);
-        if (existing) {
-            existing.count += 1;
-            existing.reach = Math.max(existing.reach, reach);
-        } else {
-            byElement.set(entry.el, { ...entry, reach, count: 1 });
-        }
-    }
-    return [...byElement.values()].sort(
-        (a, b) => b.depth - a.depth || b.reach - a.reach,
-    );
-}
-
-function checkRowLayout(row, expectStacked) {
-    if (expectStacked) {
-        if (row.flexDirection !== "column") {
-            return `row ${row.index}: flex-direction is ${row.flexDirection}, expected column`;
-        }
-        if (row.sparkline.top < row.info.bottom - 1) {
-            return `row ${row.index}: sparkline top ${row.sparkline.top} is above info bottom ${row.info.bottom} — still side by side`;
-        }
-        const minWidth = row.containerWidth * FULL_WIDTH_FRACTION;
-        if (row.info.width < minWidth) {
-            return `row ${row.index}: info block is ${row.info.width}px of ${row.containerWidth}px — shrunk, not reflowed`;
-        }
-        if (row.sparkline.width < minWidth) {
-            return `row ${row.index}: sparkline is ${row.sparkline.width}px of ${row.containerWidth}px — shrunk, not reflowed`;
-        }
-        return null;
-    }
-
-    if (row.flexDirection !== "row") {
-        return `row ${row.index}: flex-direction is ${row.flexDirection}, expected row`;
-    }
-    if (row.sparkline.left < row.info.right - 1) {
-        return `row ${row.index}: sparkline left ${row.sparkline.left} overlaps info right ${row.info.right} — not side by side`;
-    }
-    return null;
-}
-
-export function evaluateChecks(facts, viewport, probes) {
-    const checks = [];
-    const check = (name, ok, detail) => checks.push({ name, ok, detail });
-
-    // Guard against the whole harness passing vacuously because the page
-    // never rendered. Everything below is only meaningful if this holds.
-    check(
-        "app-rendered",
-        facts.rowCount >= 10 && facts.numericLatencies >= 5,
-        `${facts.rowCount} host rows, ${facts.numericLatencies} showing a numeric latency`,
-    );
-
-    const viewportWidth = Math.min(facts.innerWidth, facts.documentClientWidth);
-    const culprits = deepestOffenders([
-        ...facts.overflowing,
-        ...facts.contentOverflowing,
-    ]);
-    check(
-        "no-horizontal-overflow",
-        facts.documentScrollWidth <= viewportWidth,
-        `documentElement.scrollWidth ${facts.documentScrollWidth} vs viewport ${viewportWidth}` +
-            (culprits.length === 0
-                ? ""
-                : "; widest content: " +
-                  summarise(
-                      culprits,
-                      (c) =>
-                          `${c.el} reaches ${Math.round(c.reach)}px${c.count > 1 ? ` (x${c.count})` : ""}`,
-                  )),
-    );
-
-    check(
-        "nothing-past-viewport-edge",
-        facts.overflowing.length === 0,
-        facts.overflowing.length === 0
-            ? "no element extends past the viewport"
-            : `${facts.overflowing.length} element(s) past the edge: ` +
-                  summarise(
-                      facts.overflowing,
-                      (o) => `${o.el} spans ${o.left}..${o.right}`,
-                  ),
-    );
-
-    check(
-        "no-clipped-text",
-        facts.clipped.length === 0,
-        facts.clipped.length === 0
-            ? "no element hides text behind overflow (deliberate ellipsis excluded)"
-            : `${facts.clipped.length} element(s) clipping text: ` +
-                  summarise(
-                      facts.clipped,
-                      (c) =>
-                          `${c.el} scrollWidth ${c.scrollWidth} > clientWidth ${c.clientWidth}`,
-                  ),
-    );
-
-    if (viewport.touch) {
-        // Presence first: a selector that matches nothing contributes no
-        // undersized targets, so without this the check would report
-        // "all 0 controls are at least 44x44" and pass.
-        const seen = new Map();
-        for (const target of facts.tapTargets) {
-            seen.set(target.selector, (seen.get(target.selector) ?? 0) + 1);
-        }
-        const missing = INTERACTIVE_CONTROLS.filter(
-            (control) => (seen.get(control.selector) ?? 0) < control.minCount,
-        );
-
-        const undersized = facts.tapTargets.filter(
-            (t) => t.width < MIN_TAP_TARGET_PX || t.height < MIN_TAP_TARGET_PX,
-        );
-        const bySelector = new Map();
-        for (const target of undersized) {
-            const existing = bySelector.get(target.selector);
-            if (!existing || target.width * target.height < existing.area) {
-                bySelector.set(target.selector, {
-                    ...target,
-                    area: target.width * target.height,
-                    count: (existing?.count ?? 0) + 1,
-                });
-            } else {
-                existing.count += 1;
-            }
-        }
-        const detail = [];
-        if (missing.length > 0) {
-            detail.push(
-                "oracle is not measuring the page: " +
-                    summarise(
-                        missing,
-                        (c) =>
-                            `${c.selector} matched ${seen.get(c.selector) ?? 0} visible element(s), expected at least ${c.minCount}`,
-                        4,
-                    ),
-            );
-        }
-        detail.push(
-            undersized.length === 0
-                ? `${facts.tapTargets.length} controls measured, all at least ${MIN_TAP_TARGET_PX}x${MIN_TAP_TARGET_PX}`
-                : `${undersized.length} of ${facts.tapTargets.length} controls below ${MIN_TAP_TARGET_PX}x${MIN_TAP_TARGET_PX}: ` +
-                      summarise(
-                          [...bySelector.values()],
-                          (t) =>
-                              `${t.selector} ${t.width}x${t.height}${t.count > 1 ? ` (x${t.count})` : ""}`,
-                          4,
-                      ),
-        );
-        check(
-            `tap-targets-${MIN_TAP_TARGET_PX}px`,
-            missing.length === 0 && undersized.length === 0,
-            detail.join("; "),
-        );
-    }
-
-    const badRows = facts.rows
-        .map((row) => checkRowLayout(row, viewport.expectStacked))
-        .filter(Boolean);
-    check(
-        viewport.expectStacked ? "host-rows-stacked" : "host-rows-side-by-side",
-        facts.rows.length > 0 && badRows.length === 0,
-        facts.rows.length === 0
-            ? "no host rows were measured"
-            : badRows.length === 0
-              ? `all ${facts.rows.length} rows laid out as expected`
-              : `${badRows.length} of ${facts.rows.length} rows wrong: ` +
-                summarise(badRows, (r) => r),
-    );
-
-    // The mobile early-return path proposed in #8 was rejected: narrow
-    // viewports must keep probing and keep detecting the gateway, not
-    // quietly skip work.
-    check(
-        "probing-still-runs",
-        probes.attempted > 0,
-        `${probes.attempted} outbound probe requests issued`,
-    );
-    check(
-        "gateway-detection-still-runs",
-        facts.gatewayDetected,
-        facts.gatewayDetected
-            ? "Local Gateway row present"
-            : "no Local Gateway row — gateway detection did not run or did not complete",
-    );
-
-    return checks;
-}

test/viewport/facts.js

@@ -1,184 +0,0 @@
-// Layout facts collected from inside the page.
-//
-// This function is serialised and evaluated in the browser, so it must be
-// entirely self-contained: no imports, no closures over module scope. It
-// only *measures*; every pass/fail decision is made back in node by
-// checks.js, so failures can be reported with real numbers attached.
-
-export function collectLayoutFacts(options) {
-    const describe = (el) => {
-        const id = el.id ? "#" + el.id : "";
-        const classes =
-            typeof el.className === "string" && el.className.trim()
-                ? "." + el.className.trim().split(/\s+/).slice(0, 3).join(".")
-                : "";
-        return el.tagName.toLowerCase() + id + classes;
-    };
-
-    const round = (n) => Math.round(n * 10) / 10;
-
-    // Overflow propagates up every ancestor, so a single wide element
-    // reports as body, #app, the row, and so on. Depth lets the report
-    // name the deepest — that is, the actual — offender.
-    const depthOf = (el) => {
-        let depth = 0;
-        for (let node = el.parentElement; node; node = node.parentElement) {
-            depth++;
-        }
-        return depth;
-    };
-
-    const isVisible = (el) => {
-        const style = getComputedStyle(el);
-        if (style.display === "none") return false;
-        if (style.visibility === "hidden") return false;
-        const rect = el.getBoundingClientRect();
-        return rect.width > 0 && rect.height > 0;
-    };
-
-    const innerWidth = window.innerWidth;
-    const clientWidth = document.documentElement.clientWidth;
-    // Under mobile emulation Chrome lets window.innerWidth *grow* to the
-    // width of overflowing content, exactly as a phone zooms out to fit a
-    // too-wide page. Measuring against it would therefore hide the
-    // overflow it is supposed to expose: at a 320px device width a page
-    // that spills to 350 reports innerWidth 350 and looks clean. Every
-    // comparison below is against the layout viewport instead.
-    const viewportWidth = Math.min(innerWidth, clientWidth);
-    const elements = Array.from(document.querySelectorAll("body *"));
-
-    // Elements sticking out past the right (or left) edge of the viewport.
-    // The document-level scrollWidth check says *that* the page overflows;
-    // this says *what* is doing it.
-    const overflowing = [];
-    // Elements clipping their own text. Deliberate ellipsis truncation
-    // (Tailwind's `truncate`) is opt-in and excluded: it is a design
-    // choice, not breakage.
-    const clipped = [];
-    // Elements whose content spills out of their own box without being
-    // clipped, past the right edge of the viewport. A block element is
-    // only ever as wide as its container, so text overflowing it has no
-    // element rect of its own to catch — but it is exactly what drags
-    // documentElement.scrollWidth past the viewport width, so without
-    // this the page-level overflow failure has nothing to point at.
-    const contentOverflowing = [];
-
-    for (const el of elements) {
-        if (!isVisible(el)) continue;
-        const rect = el.getBoundingClientRect();
-        if (rect.right > viewportWidth + 1 || rect.left < -1) {
-            overflowing.push({
-                el: describe(el),
-                depth: depthOf(el),
-                left: round(rect.left),
-                right: round(rect.right),
-            });
-        }
-        const style = getComputedStyle(el);
-        const clips =
-            style.overflowX === "hidden" || style.overflowX === "clip";
-        const ellipsis = style.textOverflow === "ellipsis";
-        const hasText = el.textContent.trim().length > 0;
-        const spills =
-            el.clientWidth > 0 && el.scrollWidth > el.clientWidth + 1;
-        if (clips && !ellipsis && hasText && spills) {
-            clipped.push({
-                el: describe(el),
-                scrollWidth: el.scrollWidth,
-                clientWidth: el.clientWidth,
-            });
-        }
-        if (
-            !clips &&
-            spills &&
-            rect.left + el.scrollWidth > viewportWidth + 1
-        ) {
-            contentOverflowing.push({
-                el: describe(el),
-                depth: depthOf(el),
-                scrollWidth: el.scrollWidth,
-                clientWidth: el.clientWidth,
-                reach: round(rect.left + el.scrollWidth),
-            });
-        }
-    }
-
-    // Interactive controls. The measured target is the nearest thing that
-    // is genuinely tappable — for a checkbox that is the <label> wrapping
-    // it, which is larger than the box itself and is what a finger hits.
-    const tapTargets = [];
-    for (const selector of options.interactiveSelectors) {
-        for (const el of document.querySelectorAll(selector)) {
-            if (!isVisible(el)) continue;
-            const target = el.closest("button, a, label, select") || el;
-            const rect = target.getBoundingClientRect();
-            tapTargets.push({
-                selector,
-                el: describe(target),
-                width: round(rect.width),
-                height: round(rect.height),
-            });
-        }
-    }
-
-    // Host rows. The question is not "did it get narrower" but "did it
-    // reflow": the info block and the sparkline must end up stacked
-    // vertically and full width in the narrow layout, and side by side in
-    // the wide one. Both the computed flex-direction and the actual
-    // geometry are recorded so a row that claims to be a column but is
-    // still laid out side by side cannot slip through.
-    const rows = [];
-    for (const row of document.querySelectorAll(".host-row")) {
-        const inner = row.firstElementChild;
-        if (!inner) continue;
-        const sparkline = inner.querySelector(".sparkline-container");
-        const info = sparkline ? sparkline.previousElementSibling : null;
-        if (!sparkline || !info) continue;
-        const innerStyle = getComputedStyle(inner);
-        const innerRect = inner.getBoundingClientRect();
-        const infoRect = info.getBoundingClientRect();
-        const sparkRect = sparkline.getBoundingClientRect();
-        rows.push({
-            index: row.dataset.index,
-            flexDirection: innerStyle.flexDirection,
-            containerWidth: round(innerRect.width),
-            info: {
-                left: round(infoRect.left),
-                right: round(infoRect.right),
-                bottom: round(infoRect.bottom),
-                width: round(infoRect.width),
-            },
-            sparkline: {
-                left: round(sparkRect.left),
-                top: round(sparkRect.top),
-                width: round(sparkRect.width),
-            },
-        });
-    }
-
-    const localRows = Array.from(
-        document.querySelectorAll("#local-hosts .host-row"),
-    );
-
-    return {
-        innerWidth,
-        // innerWidth includes any classic scrollbar, clientWidth does not.
-        // Reported separately so the overflow check can hold itself to the
-        // narrower of the two rather than to whichever one is more
-        // forgiving.
-        documentClientWidth: document.documentElement.clientWidth,
-        documentScrollWidth: document.documentElement.scrollWidth,
-        overflowing,
-        contentOverflowing,
-        clipped,
-        tapTargets,
-        rows,
-        rowCount: document.querySelectorAll(".host-row").length,
-        numericLatencies: Array.from(
-            document.querySelectorAll(".latency-value"),
-        ).filter((el) => /\d/.test(el.textContent)).length,
-        gatewayDetected: localRows.some((row) =>
-            row.textContent.includes("Local Gateway"),
-        ),
-    };
-}

test/viewport/harness.js

@@ -1,258 +0,0 @@
-// Responsive-layout harness.
-//
-// Drives the built frontend in a real, containerised, digest-pinned Chrome
-// over CDP and asserts on computed layout at every viewport width derived
-// from the app's own CSS. Screenshots are written alongside as artifacts;
-// they are not the evidence, the assertions are.
-//
-// This is not meant to be run by hand. `make frontend-viewport-test` brings
-// up the browser and the web server and then runs this; every input it
-// needs arrives in the environment.
-
-import { mkdirSync, writeFileSync } from "node:fs";
-import { join } from "node:path";
-import puppeteer from "puppeteer-core";
-import { collectLayoutFacts } from "./facts.js";
-import { evaluateChecks, INTERACTIVE_SELECTORS } from "./checks.js";
-import { deriveViewports } from "./viewports.js";
-
-function required(name) {
-    const value = process.env[name];
-    if (!value) {
-        throw new Error(
-            `${name} is not set; run this via script/frontend-viewport-test`,
-        );
-    }
-    return value;
-}
-
-const ROOT = required("NETWATCH_ROOT");
-const BASE_URL = required("NETWATCH_BASE_URL");
-const CDP_URL = required("NETWATCH_CDP_URL");
-const ARTIFACT_DIR = required("NETWATCH_ARTIFACT_DIR");
-
-const BROWSER_TIMEOUT_MS = 60000;
-const PAGE_TIMEOUT_MS = 30000;
-
-// Canned responses for the app's outbound latency probes. The browser
-// container sits on an --internal docker network and physically cannot
-// reach the internet, so nothing here is about blocking traffic; it is
-// about determinism. Real probes would render 24 rows of whatever the
-// network happened to be doing. These delays make the rows show a
-// realistic spread of value widths — one, two and three digit latencies,
-// plus some unreachable rows — because that spread is what the layout has
-// to survive.
-const PROBE_DELAYS_MS = [2, 45, 123, 456, 780];
-// One in every UNREACHABLE_MODULUS probes is failed outright so that the
-// offline row rendering is exercised too.
-const UNREACHABLE_MODULUS = 7;
-// The gateway candidate that "answers", so gateway detection succeeds and
-// the Local Gateway row renders. Matches GATEWAY_CANDIDATES in src/main.js.
-const RESPONSIVE_GATEWAY = "http://192.168.1.1";
-
-const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
-
-function stableHash(text) {
-    let hash = 0;
-    for (let i = 0; i < text.length; i++) {
-        hash = (hash * 31 + text.charCodeAt(i)) | 0;
-    }
-    return Math.abs(hash);
-}
-
-async function connectBrowser() {
-    const deadline = Date.now() + BROWSER_TIMEOUT_MS;
-    let lastError;
-    for (;;) {
-        try {
-            const response = await fetch(`${CDP_URL}/json/version`);
-            const info = await response.json();
-            // The endpoint advertises whatever Host it was reached on;
-            // pin it back to the address we actually dialled.
-            const endpoint = new URL(info.webSocketDebuggerUrl);
-            endpoint.host = new URL(CDP_URL).host;
-            const browser = await puppeteer.connect({
-                browserWSEndpoint: endpoint.toString(),
-                protocolTimeout: BROWSER_TIMEOUT_MS,
-            });
-            return { browser, version: info.Browser };
-        } catch (error) {
-            lastError = error;
-            if (Date.now() > deadline) {
-                throw new Error(`browser never came up: ${lastError}`);
-            }
-            await sleep(250);
-        }
-    }
-}
-
-function installProbeResponder(page, probes) {
-    const respond = (request, delayMs) =>
-        sleep(delayMs).then(() =>
-            request.respond({
-                status: 200,
-                contentType: "text/plain",
-                body: "",
-            }),
-        );
-
-    page.on("request", (request) => {
-        const url = request.url();
-        const settle = async () => {
-            if (url.startsWith(BASE_URL) || url.startsWith("data:")) {
-                return request.continue();
-            }
-            probes.attempted++;
-            if (url.startsWith(RESPONSIVE_GATEWAY)) {
-                probes.fulfilled++;
-                return respond(request, 5);
-            }
-            const hash = stableHash(url);
-            if (hash % UNREACHABLE_MODULUS === 0) {
-                probes.failed++;
-                return request.abort("connectionfailed");
-            }
-            probes.fulfilled++;
-            return respond(
-                request,
-                PROBE_DELAYS_MS[hash % PROBE_DELAYS_MS.length],
-            );
-        };
-        // The page may be torn down while a delayed response is pending;
-        // that is not a harness failure.
-        settle().catch(() => {});
-    });
-}
-
-async function runViewport(browser, viewport) {
-    const page = await browser.newPage();
-    const probes = { attempted: 0, fulfilled: 0, failed: 0 };
-    try {
-        page.setDefaultTimeout(PAGE_TIMEOUT_MS);
-        await page.setRequestInterception(true);
-        installProbeResponder(page, probes);
-        await page.setViewport({
-            width: viewport.width,
-            height: viewport.height,
-            deviceScaleFactor: viewport.deviceScaleFactor,
-            isMobile: viewport.touch,
-            hasTouch: viewport.touch,
-            isLandscape: viewport.width > viewport.height,
-        });
-
-        await page.goto(BASE_URL, { waitUntil: "load" });
-        await page.waitForSelector(".host-row");
-
-        // The app discards its first tick as a cold start, so rows only
-        // carry real values from the second one. Changing the interval
-        // restarts the loop at 1s, which reaches a populated UI without
-        // waiting out two default 3s intervals — and exercises the
-        // interval dropdown while we are at it.
-        await page.select("#interval-select", "1000");
-        await page.waitForFunction(
-            () =>
-                Array.from(document.querySelectorAll(".latency-value")).filter(
-                    (el) => /\d/.test(el.textContent),
-                ).length >= 5,
-        );
-        // Let the resize/redraw handlers settle before measuring.
-        await page.evaluate(
-            () =>
-                new Promise((resolve) =>
-                    requestAnimationFrame(() => requestAnimationFrame(resolve)),
-                ),
-        );
-
-        const facts = await page.evaluate(collectLayoutFacts, {
-            interactiveSelectors: INTERACTIVE_SELECTORS,
-        });
-
-        const screenshot = join(
-            ARTIFACT_DIR,
-            `${viewport.width}x${viewport.height}-${viewport.name}.png`,
-        );
-        await page.screenshot({ path: screenshot, fullPage: true });
-
-        return {
-            viewport,
-            probes,
-            facts,
-            screenshot,
-            checks: evaluateChecks(facts, viewport, probes),
-        };
-    } finally {
-        await page.close().catch(() => {});
-    }
-}
-
-function report(results, conditions, browserVersion) {
-    const label = (viewport) =>
-        `${viewport.width}x${viewport.height}`.padEnd(9) +
-        " " +
-        viewport.name.padEnd(24);
-
-    console.log(`browser:     ${browserVersion}`);
-    console.log(`served from: ${BASE_URL} (built dist/)`);
-    console.log(
-        "breakpoints: " +
-            conditions
-                .map((c) => `${c.type}-width ${c.px}px (${c.source})`)
-                .join(", "),
-    );
-    console.log("");
-
-    let passed = 0;
-    let failed = 0;
-    for (const result of results) {
-        const bad = result.checks.filter((c) => !c.ok);
-        passed += result.checks.length - bad.length;
-        failed += bad.length;
-        // Passing viewports get one line. Detail is for failures.
-        console.log(
-            `${bad.length === 0 ? "PASS" : "FAIL"} ${label(result.viewport)} ` +
-                `${result.checks.length - bad.length}/${result.checks.length} checks` +
-                `${result.viewport.expectStacked ? "  [narrow layout expected]" : ""}`,
-        );
-        for (const check of bad) {
-            console.log(`       ${check.name}: ${check.detail}`);
-        }
-        if (bad.length > 0) {
-            console.log(`       why this width: ${result.viewport.why}`);
-            console.log(`       screenshot: ${result.screenshot}`);
-        }
-    }
-
-    console.log("");
-    console.log(
-        `${results.length} viewports, ${passed + failed} checks: ` +
-            `${passed} passed, ${failed} failed`,
-    );
-    console.log(`artifacts: ${ARTIFACT_DIR}`);
-    return failed;
-}
-
-async function main() {
-    const { conditions, viewports } = deriveViewports(ROOT);
-    mkdirSync(ARTIFACT_DIR, { recursive: true });
-
-    const { browser, version } = await connectBrowser();
-    const results = [];
-    try {
-        for (const viewport of viewports) {
-            results.push(await runViewport(browser, viewport));
-        }
-    } finally {
-        await browser.disconnect().catch(() => {});
-    }
-
-    writeFileSync(
-        join(ARTIFACT_DIR, "results.json"),
-        JSON.stringify({ browser: version, conditions, results }, null, 2) +
-            "\n",
-    );
-
-    const failed = report(results, conditions, version);
-    process.exitCode = failed === 0 ? 0 : 1;
-}
-
-await main();

test/viewport/viewports.js

@@ -1,224 +0,0 @@
-// Viewport derivation for the responsive-layout harness.
-//
-// The widths tested are read out of the CSS the application actually
-// ships, not taken from a list of popular phone models. A generic 375px
-// "phone" test sails straight past an off-by-one error at a media query
-// boundary, which is the classic way a responsive layout breaks, so
-// every breakpoint found in the sources is probed three times: one pixel
-// below it, exactly on it, and one pixel above it.
-//
-// Nothing here hardcodes 768. If someone adds a second media block or
-// starts using Tailwind responsive prefixes, that breakpoint starts
-// being covered without this file being edited.
-
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-
-// Tailwind CSS v4 default breakpoints, in rem. The app currently uses
-// none of these prefixes, so the whole table is inert until someone
-// writes an `md:`-prefixed utility class.
-const TAILWIND_BREAKPOINT_REM = {
-    sm: 40,
-    md: 48,
-    lg: 64,
-    xl: 80,
-    "2xl": 96,
-};
-
-// The app does not override the root font size, so rem and em in media
-// queries resolve against the browser default.
-const ROOT_FONT_SIZE_PX = 16;
-
-// Extract every min-width / max-width condition from the @media blocks in
-// a stylesheet. Returns e.g. [{ type: "max", px: 768, source: "..." }].
-export function mediaConditionsFromCss(css, source) {
-    const conditions = [];
-    for (const block of css.matchAll(/@media([^{]+)\{/g)) {
-        const features = block[1].matchAll(
-            /\(\s*(min|max)-width\s*:\s*([\d.]+)(px|rem|em)\s*\)/g,
-        );
-        for (const feature of features) {
-            const scale = feature[3] === "px" ? 1 : ROOT_FONT_SIZE_PX;
-            conditions.push({
-                type: feature[1],
-                px: Math.round(Number(feature[2]) * scale),
-                source,
-            });
-        }
-    }
-    return conditions;
-}
-
-// Extract the breakpoints implied by Tailwind responsive prefixes used in
-// markup. A prefix only counts when it opens a utility class, so `text-sm`
-// does not masquerade as the `sm:` breakpoint.
-export function mediaConditionsFromMarkup(sources) {
-    const conditions = [];
-    for (const { path, text } of sources) {
-        for (const [name, rem] of Object.entries(TAILWIND_BREAKPOINT_REM)) {
-            const used = new RegExp(
-                `(^|["'\\s])${name}:[a-z0-9[\\](),_./%-]+`,
-                "m",
-            ).test(text);
-            if (used) {
-                conditions.push({
-                    type: "min",
-                    px: rem * ROOT_FONT_SIZE_PX,
-                    source: path,
-                });
-            }
-        }
-    }
-    return conditions;
-}
-
-// Whether a given width should be rendering the app's narrow (stacked)
-// layout.
-//
-// Two breakpoint styles can be answered from the condition list alone:
-//
-//   - Desktop-first, which is what the app ships today: the wide layout is
-//     unconditional and every narrow rule lives in a `max-width` block, so
-//     a width is narrow exactly when one of those blocks matches. Note that
-//     `max-width: 768px` matches *at* 768 — getting this inclusive boundary
-//     wrong in either direction is what the three-widths-per-breakpoint
-//     sweep exists to catch.
-//   - Mobile-first, which is what Tailwind's `sm:`/`md:` prefixes are: the
-//     stacked layout is the unconditional base and a `min-width` block is
-//     what widens it, so a width is narrow exactly when it sits below every
-//     `min-width` breakpoint.
-//
-// A mix of the two cannot be resolved from the breakpoints alone — which
-// block owns the host-row reflow is a property of the rules inside it, not
-// of the condition — so this throws rather than guessing. Guessing is how
-// the wrong expectation gets applied at the right widths and the whole
-// sweep quietly verifies nothing.
-export function expectsStackedLayout(width, conditions) {
-    const kinds = new Set(conditions.map((c) => c.type));
-    for (const kind of kinds) {
-        if (kind !== "max" && kind !== "min") {
-            throw new Error(
-                `unsupported media condition type "${kind}" in ` +
-                    "expectsStackedLayout (test/viewport/viewports.js)",
-            );
-        }
-    }
-    if (kinds.has("max") && kinds.has("min")) {
-        throw new Error(
-            "the app now mixes max-width and min-width breakpoints (" +
-                conditions
-                    .map((c) => `${c.type}-width ${c.px}px in ${c.source}`)
-                    .join(", ") +
-                "), so which layout a width should be showing can no longer " +
-                "be inferred from the breakpoint list; teach " +
-                "expectsStackedLayout in test/viewport/viewports.js which " +
-                "block owns the host-row reflow",
-        );
-    }
-    if (kinds.has("min")) {
-        return !conditions.some((c) => width >= c.px);
-    }
-    return conditions.some((c) => width <= c.px);
-}
-
-// Viewports that are not derived from a breakpoint. Each one is here for
-// a stated reason; none of them is a stand-in for "a phone".
-const ANCHOR_VIEWPORTS = [
-    {
-        name: "floor-portrait",
-        width: 320,
-        height: 568,
-        deviceScaleFactor: 2,
-        touch: true,
-        why: "320px is the narrowest viewport still in mainstream use; nothing has to work below it",
-    },
-    {
-        name: "phone-landscape-narrow",
-        width: 667,
-        height: 375,
-        deviceScaleFactor: 2,
-        touch: true,
-        why: "phone rotated to landscape, still inside the narrow layout",
-    },
-    {
-        name: "phone-landscape-wide",
-        width: 844,
-        height: 390,
-        deviceScaleFactor: 3,
-        touch: true,
-        why: "large phone rotated to landscape: crosses into the wide layout while still being a touch device",
-    },
-    {
-        name: "desktop",
-        width: 1280,
-        height: 800,
-        deviceScaleFactor: 1,
-        touch: false,
-        why: "desktop baseline",
-    },
-];
-
-export function deriveViewports(root) {
-    const conditions = [
-        ...mediaConditionsFromCss(
-            readFileSync(join(root, "src/styles.css"), "utf8"),
-            "src/styles.css",
-        ),
-        ...mediaConditionsFromMarkup([
-            {
-                path: "src/main.js",
-                text: readFileSync(join(root, "src/main.js"), "utf8"),
-            },
-            {
-                path: "index.html",
-                text: readFileSync(join(root, "index.html"), "utf8"),
-            },
-        ]),
-    ];
-
-    if (conditions.length === 0) {
-        throw new Error(
-            "no responsive breakpoints found in src/styles.css, src/main.js or " +
-                "index.html — either the responsive layout was deleted or this " +
-                "derivation has stopped matching the sources",
-        );
-    }
-
-    const viewports = new Map();
-    const add = (viewport) => {
-        const key = `${viewport.width}x${viewport.height}`;
-        if (!viewports.has(key)) viewports.set(key, viewport);
-    };
-
-    for (const condition of conditions) {
-        for (const [offset, label] of [
-            [-1, "below"],
-            [0, "at"],
-            [+1, "above"],
-        ]) {
-            const width = condition.px + offset;
-            add({
-                name: `${condition.type}-width-${condition.px}-${label}`,
-                width,
-                // Tall enough that the whole app is laid out in one column
-                // without the viewport height influencing wrapping.
-                height: 1024,
-                deviceScaleFactor: 2,
-                touch: true,
-                why: `${offset === 0 ? "exactly on" : `1px ${label}`} the ${condition.type}-width: ${condition.px}px breakpoint declared in ${condition.source}`,
-            });
-        }
-    }
-
-    for (const anchor of ANCHOR_VIEWPORTS) add(anchor);
-
-    return {
-        conditions,
-        viewports: [...viewports.values()]
-            .map((viewport) => ({
-                ...viewport,
-                expectStacked: expectsStackedLayout(viewport.width, conditions),
-            }))
-            .sort((a, b) => a.width - b.width || a.height - b.height),
-    };
-}

vite.config.js

@@ -7,13 +7,6 @@ const commitFull = execSync("git rev-parse HEAD").toString().trim();
 
 export default defineConfig({
     plugins: [tailwindcss()],
-    server: {
-        // Proxy /api to a locally running netwatch-server so `yarn dev`
-        // exercises the real report-posting path.
-        proxy: {
-            "/api": "http://127.0.0.1:8080",
-        },
-    },
     define: {
         __COMMIT_HASH__: JSON.stringify(commitHash),
         __COMMIT_FULL__: JSON.stringify(commitFull),

yarn.lock

@@ -197,14 +197,6 @@
     "@emnapi/runtime" "^1.7.1"
     "@tybys/wasm-util" "^0.10.1"
 
-"@puppeteer/browsers@3.1.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@puppeteer/browsers/-/browsers-3.1.0.tgz#5728ae0bc649263133ac1f8bd5d360eb75d11748"
-  integrity sha512-RDLpio3fH/qrj5k4DVY6eyiN8tCS0Zovd/6jW//n605oeqkWcUjn+3k+9ZtZBnbwMpsu0F7xDIiKXvVmG5c5Bw==
-  dependencies:
-    modern-tar "^0.7.6"
-    yargs "^18.0.0"
-
 "@rollup/rollup-android-arm-eabi@4.57.0":
   version "4.57.0"
   resolved "https://registry.yarnpkg.com/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.57.0.tgz#f762035679a6b168138c94c960fda0b0cdb00d98"
@@ -449,16 +441,6 @@
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-1.0.8.tgz#958b91c991b1867ced318bedea0e215ee050726e"
   integrity sha512-dWHzHa2WqEXI/O1E9OjrocMTKJl2mSrEolh1Iomrv6U+JuNwaHXsXx9bLu5gG7BUWFIN0skIQJQ/L1rIex4X6w==
 
-ansi-regex@^6.2.2:
-  version "6.2.2"
-  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-6.2.2.tgz#60216eea464d864597ce2832000738a0589650c1"
-  integrity sha512-Bq3SmSpyFHaWjPk8If9yc6svM8c56dB5BAtW4Qbw5jHTwwXXcTLoRMkpDJp6VL0XzlWaCHTXrkFURMYmD0sLqg==
-
-ansi-styles@^6.2.1:
-  version "6.2.3"
-  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-6.2.3.tgz#c044d5dcc521a076413472597a1acb1f103c4041"
-  integrity sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==
-
 autoprefixer@^10.4.23:
   version "10.4.23"
   resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-10.4.23.tgz#c6aa6db8e7376fcd900f9fd79d143ceebad8c4e6"
@@ -491,43 +473,16 @@ caniuse-lite@^1.0.30001759, caniuse-lite@^1.0.30001760:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001766.tgz#b6f6b55cb25a2d888d9393104d14751c6a7d6f7a"
   integrity sha512-4C0lfJ0/YPjJQHagaE9x2Elb69CIqEPZeG0anQt9SIvIoOH4a4uaRl73IavyO+0qZh6MDLH//DrXThEYKHkmYA==
 
-chromium-bidi@17.0.2:
-  version "17.0.2"
-  resolved "https://registry.yarnpkg.com/chromium-bidi/-/chromium-bidi-17.0.2.tgz#921a586deecd0c2d8b9242c4c1b73c3aa39ff77c"
-  integrity sha512-5v9GQFhTktFvotn/OFNJBmKLKRAb6n9r0bVCwf7sHgWc3/JryK0bj1nn93L3pHFrfgcsu6Be6EWsDi+1XHTGDg==
-  dependencies:
-    mitt "^3.0.1"
-    zod "^3.24.1"
-
-cliui@^9.0.1:
-  version "9.0.1"
-  resolved "https://registry.yarnpkg.com/cliui/-/cliui-9.0.1.tgz#6f7890f386f6f1f79953adc1f78dec46fcc2d291"
-  integrity sha512-k7ndgKhwoQveBL+/1tqGJYNz097I7WOvwbmmU2AR5+magtbjPWQTS1C5vzGkBC8Ym8UWRzfKUzUUqFLypY4Q+w==
-  dependencies:
-    string-width "^7.2.0"
-    strip-ansi "^7.1.0"
-    wrap-ansi "^9.0.0"
-
 detect-libc@^2.0.3:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-2.1.2.tgz#689c5dcdc1900ef5583a4cb9f6d7b473742074ad"
   integrity sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==
 
-devtools-protocol@0.0.1653615:
-  version "0.0.1653615"
-  resolved "https://registry.yarnpkg.com/devtools-protocol/-/devtools-protocol-0.0.1653615.tgz#c600e0c619612156b2422a66d958ba188d87dbe8"
-  integrity sha512-pGVkY3T/qXxAp2nFPodwYqOevk6ncNMSmvL8QfRCx5ZWGd6Vor7AFNmyaA8Zs6uJyP1QAfjuLandCgvSix1BNA==
-
 electron-to-chromium@^1.5.263:
   version "1.5.282"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.5.282.tgz#6695816e5b170210d6aa07561546ed7d97347630"
   integrity sha512-FCPkJtpst28UmFzd903iU7PdeVTfY0KAeJy+Lk0GLZRwgwYHn/irRcaCbQQOmr5Vytc/7rcavsYLvTM8RiHYhQ==
 
-emoji-regex@^10.3.0:
-  version "10.6.0"
-  resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-10.6.0.tgz#bf3d6e8f7f8fd22a65d9703475bc0147357a6b0d"
-  integrity sha512-toUI84YS5YmxW219erniWD0CIVOo46xGKColeNQRgOzDorgBi1v4D71/OFzgD9GO2UGKIv1C3Sp8DAn0+j5w7A==
-
 enhanced-resolve@^5.18.3:
   version "5.18.4"
   resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-5.18.4.tgz#c22d33055f3952035ce6a144ce092447c525f828"
@@ -568,7 +523,7 @@ esbuild@^0.27.0:
     "@esbuild/win32-ia32" "0.27.2"
     "@esbuild/win32-x64" "0.27.2"
 
-escalade@^3.1.1, escalade@^3.2.0:
+escalade@^3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.2.0.tgz#011a3f69856ba189dffa7dc8fcce99d2a87903e5"
   integrity sha512-WUj2qlxaQtO4g6Pq5c29GTcWGDyd8itL8zTlipgECz3JesAiiOKotd8JU6otB3PACgG6xkJUyVhboMS+bje/jA==
@@ -588,16 +543,6 @@ fsevents@~2.3.2, fsevents@~2.3.3:
   resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.3.tgz#cac6407785d03675a2a5e1a5305c697b347d90d6"
   integrity sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==
 
-get-caller-file@^2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
-  integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
-
-get-east-asian-width@^1.0.0, get-east-asian-width@^1.5.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/get-east-asian-width/-/get-east-asian-width-1.6.0.tgz#216900f91df11a8b2c198c3e1d93d6c035a776b9"
-  integrity sha512-QRbvDIbx6YklUe6RxeTeleMR0yv3cYH6PsPZHcnVn7xv7zO1BHN8r0XETu8n6Ye3Q+ahtSarc3WgtNWmehIBfA==
-
 graceful-fs@^4.2.4:
   version "4.2.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.11.tgz#4183e4e8bf08bb6e05bbb2f7d2e0c8f712ca40e3"
@@ -689,16 +634,6 @@ magic-string@^0.30.21:
   dependencies:
     "@jridgewell/sourcemap-codec" "^1.5.5"
 
-mitt@^3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/mitt/-/mitt-3.0.1.tgz#ea36cf0cc30403601ae074c8f77b7092cdab36d1"
-  integrity sha512-vKivATfr97l2/QBCYAkXYDbrIWPM2IIKEl7YPhjCvKlG3kE2gm+uBo6nEXK3M5/Ffh/FLpKExzOQ3JJoJGFKBw==
-
-modern-tar@^0.7.6:
-  version "0.7.7"
-  resolved "https://registry.yarnpkg.com/modern-tar/-/modern-tar-0.7.7.tgz#ca71d79603630076b10733b0751ccab284bbc1ef"
-  integrity sha512-t9VmxaqrmANnEOBhpSDI6HD192Ge48k8vmWqQQL7hSFEqHEYwZbbsu49+aKLWZeRvFs3j1pMhXOqqF4kPlvjkQ==
-
 nanoid@^3.3.11:
   version "3.3.11"
   resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.11.tgz#4f4f112cefbe303202f2199838128936266d185b"
@@ -738,18 +673,6 @@ prettier@^3.8.1:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-3.8.1.tgz#edf48977cf991558f4fcbd8a3ba6015ba2a3a173"
   integrity sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==
 
-puppeteer-core@25.5.0:
-  version "25.5.0"
-  resolved "https://registry.yarnpkg.com/puppeteer-core/-/puppeteer-core-25.5.0.tgz#a41b14d582056b998e0bc3561ac47c7615d38a53"
-  integrity sha512-XPNT0dQJtphqQ4I29zxlG4IIPbg1iEHAQKWuQgtMJGXjACV77pZSmJvDi51IIIfd+DTKICcopJwUx4upVQ4XbA==
-  dependencies:
-    "@puppeteer/browsers" "3.1.0"
-    chromium-bidi "17.0.2"
-    devtools-protocol "0.0.1653615"
-    typed-query-selector "^2.12.2"
-    webdriver-bidi-protocol "0.4.2"
-    ws "^8.21.1"
-
 rollup@^4.43.0:
   version "4.57.0"
   resolved "https://registry.yarnpkg.com/rollup/-/rollup-4.57.0.tgz#9fa13c1fb779d480038f45708b5e01b9449b6853"
@@ -789,30 +712,6 @@ source-map-js@^1.2.1:
   resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.1.tgz#1ce5650fddd87abc099eda37dcff024c2667ae46"
   integrity sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==
 
-string-width@^7.0.0, string-width@^7.2.0:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/string-width/-/string-width-7.2.0.tgz#b5bb8e2165ce275d4d43476dd2700ad9091db6dc"
-  integrity sha512-tsaTIkKW9b4N+AEj+SVA+WhJzV7/zMhcSu78mLKWSk7cXMOSHsBKFWUs0fWwq8QyK3MgJBQRX6Gbi4kYbdvGkQ==
-  dependencies:
-    emoji-regex "^10.3.0"
-    get-east-asian-width "^1.0.0"
-    strip-ansi "^7.1.0"
-
-string-width@^8.2.1:
-  version "8.2.2"
-  resolved "https://registry.yarnpkg.com/string-width/-/string-width-8.2.2.tgz#7310516493df575742fe98af6fae87d85d5ed0ac"
-  integrity sha512-GaPUh5gfdrYzqeVNZvUfT23vYYxXzKYidUcnMtJg/3rxRV63EFZy3k6xfKlmfeJD0176lnUV/Usr3XcwSvFzpg==
-  dependencies:
-    get-east-asian-width "^1.5.0"
-    strip-ansi "^7.1.2"
-
-strip-ansi@^7.1.0, strip-ansi@^7.1.2:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-7.2.0.tgz#d22a269522836a627af8d04b5c3fd2c7fa3e32e3"
-  integrity sha512-yDPMNjp4WyfYBkHnjIRLfca1i6KMyGCtsVgoKe/z1+6vukgaENdgGBZt+ZmKPc4gavvEZ5OgHfHdrazhgNyG7w==
-  dependencies:
-    ansi-regex "^6.2.2"
-
 tailwindcss@4.1.18, tailwindcss@^4.1.18:
   version "4.1.18"
   resolved "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-4.1.18.tgz#f488ba47853abdb5354daf9679d3e7791fc4f4e3"
@@ -836,11 +735,6 @@ tslib@^2.4.0:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.8.1.tgz#612efe4ed235d567e8aba5f2a5fab70280ade83f"
   integrity sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==
 
-typed-query-selector@^2.12.2:
-  version "2.12.2"
-  resolved "https://registry.yarnpkg.com/typed-query-selector/-/typed-query-selector-2.12.2.tgz#65e2462ac6b0aecfae1bfac1a4f3027070dbabaa"
-  integrity sha512-EOPFbyIub4ngnEdqi2yOcNeDLaX/0jcE1JoAXQDDMIthap7FoN795lc/SHfIq2d416VufXpM8z/lD+WRm2gfOQ==
-
 update-browserslist-db@^1.2.0:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz#64d76db58713136acbeb4c49114366cc6cc2e80d"
@@ -862,49 +756,3 @@ vite@^7.3.1:
     tinyglobby "^0.2.15"
   optionalDependencies:
     fsevents "~2.3.3"
-
-webdriver-bidi-protocol@0.4.2:
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/webdriver-bidi-protocol/-/webdriver-bidi-protocol-0.4.2.tgz#f51bb71c2606e90e3d5727607c728b25d617b58b"
-  integrity sha512-VSV+fzfChirL3e7jay2yUC7B4HQCGtEWEg/MSSQbK+qWbqeGlRLlXTzPpYr3XGUvbpDHumWZBJxgesg4N7dbtA==
-
-wrap-ansi@^9.0.0:
-  version "9.0.2"
-  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-9.0.2.tgz#956832dea9494306e6d209eb871643bb873d7c98"
-  integrity sha512-42AtmgqjV+X1VpdOfyTGOYRi0/zsoLqtXQckTmqTeybT+BDIbM/Guxo7x3pE2vtpr1ok6xRqM9OpBe+Jyoqyww==
-  dependencies:
-    ansi-styles "^6.2.1"
-    string-width "^7.0.0"
-    strip-ansi "^7.1.0"
-
-ws@^8.21.1:
-  version "8.21.3"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-8.21.3.tgz#660b4faddb6a3e575c86e078126919961f4de4fc"
-  integrity sha512-201TZ/kPWxoPr/OKWjquZR1SWKXcvxdH+e1xrx89b3YbmzLMFCLfnaG1HFIgWzJOEWZ7MvpK++odZufgYR50Rw==
-
-y18n@^5.0.5:
-  version "5.0.8"
-  resolved "https://registry.yarnpkg.com/y18n/-/y18n-5.0.8.tgz#7f4934d0f7ca8c56f95314939ddcd2dd91ce1d55"
-  integrity sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==
-
-yargs-parser@^22.0.0:
-  version "22.0.0"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-22.0.0.tgz#87b82094051b0567717346ecd00fd14804b357c8"
-  integrity sha512-rwu/ClNdSMpkSrUb+d6BRsSkLUq1fmfsY6TOpYzTwvwkg1/NRG85KBy3kq++A8LKQwX6lsu+aWad+2khvuXrqw==
-
-yargs@^18.0.0:
-  version "18.1.0"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-18.1.0.tgz#cd7e98c703ef51695bbbf062ed58f28e94291b56"
-  integrity sha512-2rAgRKu54VsHkqI0/tYkmluGXHD4KW7yZoycuqDQ15QOTnc2VVfy0nN/1eMhnQLO00A+dwtK20xuCnc1YGeUyg==
-  dependencies:
-    cliui "^9.0.1"
-    escalade "^3.1.1"
-    get-caller-file "^2.0.5"
-    string-width "^8.2.1"
-    y18n "^5.0.5"
-    yargs-parser "^22.0.0"
-
-zod@^3.24.1:
-  version "3.25.76"
-  resolved "https://registry.yarnpkg.com/zod/-/zod-3.25.76.tgz#26841c3f6fd22a6a2760e7ccb719179768471e34"
-  integrity sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==