chore(release): v2.4.11

[kazukinakai]

Summary

Patch release shipping the bug fixes merged today:

• fix(keyevent): tear down old event tap on rebuild, cancel lone-modifier gesture on chords, post keyUp for media-key remaps #122 — event-tap rebuild leak / duplicate keystroke processing after monitor connect/disconnect (fixes The app becomes unresponsive #107), modifier-chord false fire, media-key stuck keyUp
• fix(settings): honor empty key-mapping list, survive duplicate exclusion IDs, follow OS login-item state, inert new mapping rows #124 — settings persistence & UI fixes (empty mapping list honored, duplicate exclusion-ID crash, login-item OS-state sync, inert new mapping rows, shadowed-mapping warning)
• fix(release): make appcast publish independently idempotent, validate sign_update binary #123 — release pipeline: independently idempotent appcast publish + feed-history protection

Bumps manifest.toml to 2.4.11 and adds the CHANGELOG entry. Merging triggers release.yml (build → sign → notarize → GitHub Release → appcast → homebrew-tap cask PR).

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