build: run the browser e2e suites in CI (closes #259)

.gitea/workflows/e2e.yml

@@ -0,0 +1,49 @@
+name: e2e
+on: [push]
+
+# The browser end-to-end suites, one job per browser, deliberately kept out
+# of the check workflow: REPO_POLICIES.md caps make test at 20 seconds and
+# script/cibuild is a plain `docker build .` whose Dockerfile runs
+# make check, so folding a browser suite into either would blow that cap
+# and slow the local fast path. Before this workflow every browser-level
+# guarantee in this repo held only when a human remembered to run it.
+#
+# One job per browser rather than two steps in one job, so a Chrome failure
+# does not hide the Firefox result.
+#
+# Each job is one script and nothing else. Both scripts need docker and
+# nothing else — they deliver the repo to the daemon as a build context and
+# build the extension inside the pinned image — which is what makes them
+# runnable here at all: the runner executes the job in a container against
+# the host's docker socket, so a `-v "$PWD:/work"` source path is resolved
+# by the host daemon and mounts an empty directory, and the runner image's
+# node is too old to install this repo's dependencies.
+#
+# These jobs REPORT, they do not gate. Whether a check blocks a merge is
+# Gitea branch protection, which this repo does not configure, so a failure
+# here is a red mark a reviewer has to account for rather than a hard
+# block. Making e2e-chrome a required check is blocked on the measured
+# flake in the dApp signing wait -- two of six runs of unmutated code on a
+# loaded machine -- tracked as
+# https://git.eeqj.de/sneak/AutistMask/issues/287. A gate that fails at
+# random teaches people to merge past red.
+#
+# Nothing here may pass vacuously. There is no continue-on-error and no
+# `|| true`. Both scripts exit non-zero when docker is missing, when the
+# image build fails, and when the browser fails to start; the Chrome
+# harness aborts the suite outright if its network interception is not in
+# effect.
+jobs:
+    e2e-chrome:
+        runs-on: ubuntu-latest
+        steps:
+            # actions/checkout v4.2.2, 2026-02-22
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+            - run: script/test-e2e
+
+    e2e-firefox:
+        runs-on: ubuntu-latest
+        steps:
+            # actions/checkout v4.2.2, 2026-02-22
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+            - run: script/test-e2e-firefox