Decouple stats daemon and preserve final mine OSD status

- Run `subminer stats -b` as a dedicated daemon process, independent from the overlay app
- Stop Anki progress spinner before showing final `✓`/`x` mine result so it is not overwritten
- Keep grammar/noise subtitle tokens hoverable while stripping annotation metadata

changes/2026-03-18-mine-osd-spinner-result.md

@@ -0,0 +1,4 @@
+type: fixed
+area: anki
+
+- Fixed card-mine OSD feedback so the final mine result stops the Anki spinner first, then shows a single-line `✓`/`x` status without being overwritten by a later spinner tick.

changes/2026-03-18-stats-daemon-decoupling.md

@@ -0,0 +1,5 @@
+type: fixed
+area: stats
+
+- `subminer stats -b` now runs as a standalone background stats daemon instead of reusing the main SubMiner app process, so the overlay app can still be launched separately for normal video watching.
+- Dashboard word mining still works against the background daemon by using a short-lived hidden helper for the Yomitan add-note flow.

changes/2026-03-18-subtitle-noise-filtering.md

@@ -1,4 +1,5 @@
 type: changed
 area: overlay
 
-- Excluded interjections and sound-effect tokens from subtitle annotation styling so they no longer inherit misleading lexical highlight treatment while still remaining visible and non-interactive in the subtitle line.
+- Excluded interjections and sound-effect tokens from subtitle annotation styling so they no longer inherit misleading lexical highlight treatment while still remaining visible and hoverable as plain subtitle tokens.
+- Expanded subtitle annotation noise filtering to also strip annotation metadata from standalone grammar-only helper tokens such as particles, auxiliaries, adnominals, common explanatory endings like `んです` / `のだ`, and merged trailing quote-particle forms like `...って` while keeping them tokenized for hover lookup.