Add typecheck + CI checks, light theme with self-hosted Inter, fix real-model test

- Typecheck: typescript 7 devDependency, `bun run typecheck`; CI gains a
  `check` stage (install, typecheck, fast tests) gating image builds (D-038).
- Light theme: every colour is a token; prefers-color-scheme: light
  overrides them. Inter Variable self-hosted from @fontsource-variable/inter,
  kept out of Bun's CSS inlining and precached (scripts/fonts.ts, D-037).
  Backend select no longer overflows on narrow phones.
- tests/live-real-model.test.ts: time budget scales with clip length and
  en_alien gets a measured WER bar; it had failed since July (D-039).
- Delete the temporary isolate_wer2.ts; fix icon "not checked in" comments
  and the README's model-weights location.
- Agent docs: branch naming, typecheck, CI, Bun CSS gotcha, permissions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/WorkBreakdown.md

@@ -349,22 +349,28 @@ Promote to a milestone via a new entry in `Decisions.md` first.
 ---
 
 ## Noticed, not fixed
-Found while bootstrapping agent docs (D-036); docs-only pass, so no code changed.
-- [ ] `bun test tests/live-real-model.test.ts` fails: the `en_alien (en)` case
+Found while bootstrapping agent docs (D-036); all fixed on 2026-10-29.
+- [x] `bun test tests/live-real-model.test.ts` fails: the `en_alien (en)` case
       times out at its 900 s limit (2026-10-29, Linux CPU/WASM, reproduced in
-      isolation; `da_festuge` and `en_aiproblem` pass).
-- [ ] `isolate_wer2.ts` (repo root) is marked "TEMP (delete after use)" and
-      writes to a stale `/tmp/claude-1000/...` scratchpad path.
-- [ ] `docs/Architecture.md` §3 and `scripts/build.ts` say `src/pwa/icons/`
+      isolation; `da_festuge` and `en_aiproblem` pass). — Not a hang; budget
+      and WER bar were calibrated for short clips. Fixed (D-039).
+- [x] `isolate_wer2.ts` (repo root) is marked "TEMP (delete after use)" and
+      writes to a stale `/tmp/claude-1000/...` scratchpad path. — Deleted.
+- [x] `docs/Architecture.md` §3 and `scripts/build.ts` say `src/pwa/icons/`
       is "not checked in", but `icon-192.png`/`icon-512.png` are tracked.
-- [ ] No typecheck or lint: `tsconfig.json` is strict but `typescript` is not
-      installed, so nothing checks types (`bun` strips them).
-- [ ] `.gitlab-ci.yml` only builds Docker images; `bun test` never runs in CI.
-- [ ] README "Graceful degradation" says server-engine weights download into
+      — Kept tracked (`ensureIcons()` is idempotent); comments + docs fixed.
+- [x] No typecheck or lint: `tsconfig.json` is strict but `typescript` is not
+      installed, so nothing checks types (`bun` strips them). — `bun run
+      typecheck` (D-038). Still no linter.
+- [x] `.gitlab-ci.yml` only builds Docker images; `bun test` never runs in CI.
+      — `check` stage: typecheck + fast suite gate the build (D-038).
+- [x] README "Graceful degradation" says server-engine weights download into
       the data volume; the env table, Dockerfile and D-031 say they are baked
-      into the image at `/opt/faster-whisper/models`.
-- [ ] `src/index.css` declares `color-scheme: light dark` but only has a dark
+      into the image at `/opt/faster-whisper/models`. — README fixed.
+- [x] `src/index.css` declares `color-scheme: light dark` but only has a dark
       palette; `Inter` is listed first in the font stack but never loaded.
+      — Light theme via tokens + self-hosted Inter (D-037). Also fixed: the
+      Backend select overflowed its panel on 390 px-wide phones.
 
 ## Recurring
 - [ ] Maintain `AGENTS.md`: