Add annotation websocket and texthooker startup config

- Add `texthooker.launchAtStartup` (default `true`) and wire startup behavior
- Add dedicated `annotationWebsocket` config/service path (default port `6678`) for texthooker annotations
- Regenerate config example/tests and update Yomitan patching/vendor assets

backlog/tasks/task-103 - Add-dedicated-annotation-websocket-for-texthooker.md

@@ -0,0 +1,38 @@
+---
+id: TASK-103
+title: Add dedicated annotation websocket for texthooker
+status: Done
+assignee:
+  - codex
+created_date: '2026-03-07 02:20'
+updated_date: '2026-03-07 02:20'
+labels:
+  - texthooker
+  - websocket
+  - subtitle
+dependencies: []
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Add a separate annotated subtitle websocket for bundled texthooker so token/JLPT/frequency markup is available on a stable dedicated port even when the regular websocket is in `auto` mode and skipped because `mpv_websocket` is installed.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+- [x] #1 Regular `websocket.enabled: "auto"` behavior remains unchanged and still skips the regular websocket when `mpv_websocket` is installed.
+- [x] #2 A separate `annotationWebsocket` config controls an independent annotated websocket with default port `6678`.
+- [x] #3 Bundled texthooker is pointed at the annotation websocket when it is enabled.
+- [x] #4 Focused regression tests cover config parsing, startup wiring, and texthooker bootstrap injection.
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Added `annotationWebsocket.enabled`/`annotationWebsocket.port` with defaults of `true`/`6678`, started that websocket independently from the regular auto-managed websocket, and injected the bundled texthooker websocket URL so it connects to the annotation feed by default.
+
+Also added focused regression coverage and regenerated the checked-in config examples.
+<!-- SECTION:FINAL_SUMMARY:END -->