Merge feat/vocabulary-hint: names-and-terms decoder prompt (spec 001 workstream 2)

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

# Conflicts:
#	docs/Architecture.md
#	docs/Decisions.md
#	docs/WorkBreakdown.md
#	server-py/sidecar.py
#	src/App.tsx
#	src/server/live.ts
#	src/server/transcribe.ts
#	tests/fixtures/fake_sidecar.py
#	tests/transcribe.test.ts

docs/WorkBreakdown.md

@@ -355,6 +355,10 @@ cached.
       for 4.3.2 and guarded by `tests/transformers-runtime.test.ts` (D-WS1a).
 - [x] WASM sessions back at the default graph optimization level: ort-web
       1.31.0-dev loads the q8 decoders at every level (D-WS1c supersedes D-014).
+- [x] Vocabulary hint "Names and terms" (D-WS2a) — optional field for every
+      model, remembered in localStorage, sent as `prompt` on file and live
+      passes (browser and server engines); cut to 120 tokens at a whole word.
+      faster-whisper gets `initial_prompt` only (hotwords measured, no gain).
 
 ---
 
@@ -398,6 +402,9 @@ Found while bootstrapping agent docs (D-036); all fixed on 2026-10-29.
       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.
+- [ ] An English "Names and terms" hint can pull a short Danish live window
+      toward English words (one 2 s da_festuge snippet on turbo, D-WS2a).
+      Not addressed: suggest same-language hints if it shows up in use.
 
 Found while building transcript translation (D-WS4b), 2026-10-29:
 - [ ] Transformers.js 4.2 batched Marian generation returns row 0's output for