Shim make dev and make build, format backend/ markdown (closes #28)

make dev ran yarn dev inline and there was no make build. Both are now
shims, over script/dev and the new script/build. .prettierignore stops
leaving out backend/, so backend/README.md is formatted and checked;
backend/.golangci.yml is left out by name instead: it is the org
standard file whose sha256 backend/script/lint checks, and prettier
would reindent it. .claude/ stays in .prettierignore, as git does not
ignore it. script/install-precommit and the date on bootstrap's pins go
back to the org model; bootstrap, fmt and fmt-check keep what the Go
backend and eslint need, each with a comment saying so.

Model: opus-5-5

TODO.md

@@ -23,6 +23,16 @@ latest run passes.
 
 # Completed Steps
 
+- 2026-10-04: `script/` and `Makefile` follow the org models (issue #28):
+  `make dev` shims to the new `script/dev`, the Vite dev server, and the new
+  `make build` to `script/build`, the frontend production build.
+  `.prettierignore` no longer leaves out `backend/`, so `make fmt` and
+  `make fmt-check` cover `backend/README.md`; it leaves out
+  `backend/.golangci.yml` by name, the org standard file whose sha256
+  `backend/script/lint` checks. `script/install-precommit` and the date on
+  `script/bootstrap`'s pins are the org model again; `script/bootstrap`,
+  `script/fmt` and `script/fmt-check` each say in a comment why they differ from
+  it
 - 2026-10-04: a frontend build on Node 26 or newer, such as `make test` on a
   host with Node 26, no longer prints Node's warning that `module.register()` is
   deprecated (issue #32); the build in `Dockerfile` runs on Node 22, which never