feat(web): PillNav bar mode, fullscreen, local STT + mic button

PillNav overhaul:
- Dropdown-as-bar: theme/AI/sync/user menus render as horizontal
  bars in the bottom stack (PillDropdownBar) instead of floating
  popovers. New onOpenBar/activeBarId props on PillNavigation.
- iconOnly pills: tags/search/workbench-tabs pills show only icons.
  Home pill removed. New iconOnly flag on PillNavItem.
- Segmented toggle groups: items sharing a `group` id render as a
  single segmented pill (e.g. Light/Dark/System triple).
- Fullscreen mode: press "f" to hide all bottom chrome, Esc to exit.
- QuickInputBar + bottom bar visibility toggles via new pills.
- Progress ring on AI trigger pill during model download
  (conic-gradient ::after, follows pill border-radius).

@mana/local-stt — new package for browser-local speech-to-text:
- Whisper models via transformers.js v4 (WebGPU + WASM fallback)
- Same Web Worker architecture as @mana/local-llm
- Two models: Whisper Tiny (150 MB) and Whisper Small (950 MB)
- Reactive Svelte 5 bindings (getLocalSttStatus, loadLocalStt, transcribe)

Voice-to-text integration:
- useLocalStt() composable: mic capture via AudioContext +
  ScriptProcessor, resample to 16kHz mono, feed into Whisper worker
- Mic button in QuickInputBar (leftAction slot) with
  recording/loading/transcribing states + pulse animation
- Transcribed text injected into InputBar via new injectedText prop
- STT model selector in AI bar alongside LLM tier controls

Also: vite.config.ts server.fs.allow expanded to monorepo root
so workspace package workers resolve in dev.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pnpm-lock.yaml

@@ -976,6 +976,9 @@ importers:
       '@mana/local-store':
         specifier: workspace:*
         version: link:../../../../packages/local-store
+      '@mana/local-stt':
+        specifier: workspace:^
+        version: link:../../../../packages/local-stt
       '@mana/qr-export':
         specifier: workspace:*
         version: link:../../../../packages/qr-export
@@ -2698,6 +2701,22 @@ importers:
         specifier: ^5.9.3
         version: 5.9.3
 
+  packages/local-stt:
+    dependencies:
+      '@huggingface/transformers':
+        specifier: ^4.0.0
+        version: 4.0.1
+    devDependencies:
+      '@types/node':
+        specifier: ^24.10.1
+        version: 24.12.2
+      svelte:
+        specifier: ^5.0.0
+        version: 5.55.1
+      typescript:
+        specifier: ^5.9.3
+        version: 5.9.3
+
   packages/notify-client:
     devDependencies:
       '@nestjs/common':
@@ -25768,7 +25787,7 @@ snapshots:
       obug: 2.1.1
       std-env: 4.0.0
       tinyrainbow: 3.1.0
-      vitest: 4.1.3(@opentelemetry/api@1.9.1)(@types/node@24.12.2)(@vitest/coverage-v8@4.1.3)(@vitest/ui@4.1.3)(jsdom@29.0.2(@noble/hashes@2.0.1))(vite@6.4.2(@types/node@24.12.2)(jiti@2.6.1)(lightningcss@1.32.0)(terser@5.46.1)(tsx@4.21.0)(yaml@2.8.3))
+      vitest: 4.1.3(@opentelemetry/api@1.9.1)(@types/node@22.19.17)(@vitest/coverage-v8@4.1.3)(@vitest/ui@4.1.3)(jsdom@29.0.2(@noble/hashes@2.0.1))(vite@6.4.2(@types/node@22.19.17)(jiti@2.6.1)(lightningcss@1.32.0)(terser@5.46.1)(tsx@4.21.0)(yaml@2.8.3))
 
   '@vitest/expect@4.1.3':
     dependencies:
@@ -25830,7 +25849,7 @@ snapshots:
       sirv: 3.0.2
       tinyglobby: 0.2.15
       tinyrainbow: 3.1.0
-      vitest: 4.1.3(@opentelemetry/api@1.9.1)(@types/node@24.12.2)(@vitest/coverage-v8@4.1.3)(@vitest/ui@4.1.3)(jsdom@29.0.2(@noble/hashes@2.0.1))(vite@6.4.2(@types/node@24.12.2)(jiti@2.6.1)(lightningcss@1.32.0)(terser@5.46.1)(tsx@4.21.0)(yaml@2.8.3))
+      vitest: 4.1.3(@opentelemetry/api@1.9.1)(@types/node@22.19.17)(@vitest/coverage-v8@4.1.3)(@vitest/ui@4.1.3)(jsdom@29.0.2(@noble/hashes@2.0.1))(vite@6.4.2(@types/node@22.19.17)(jiti@2.6.1)(lightningcss@1.32.0)(terser@5.46.1)(tsx@4.21.0)(yaml@2.8.3))
 
   '@vitest/utils@4.1.3':
     dependencies: