feat(overlay): add in-app changelog modal

- Add a changelog modal opened from tray "View Changelog" or the update notification's "What's New" button; renders in-player or in its own window like the help modal
- Fetch changelog from the newest published release so newer-than-installed notes are visible, falling back to the bundled CHANGELOG.md on failure
- Group versions by minor line (current expanded, older folded), badge the installed version, tag newer ones "New"
- Support J/K/arrow navigation, Enter to fold/unfold, R to refetch, Esc to close
- Add changelog parsing/semver-compare utils and changelog IPC channel/runtime; bundle CHANGELOG.md into packaged builds
- Replace release/release-notes.md with changes/changelog-modal.md changeset entry

src/main/dependencies.ts

@@ -109,6 +109,7 @@ export interface MainIpcRuntimeServiceDepsParams {
   removeCharacterDictionaryManagedEntry?: IpcDepsRuntimeOptions['removeCharacterDictionaryManagedEntry'];
   moveCharacterDictionaryManagedEntry?: IpcDepsRuntimeOptions['moveCharacterDictionaryManagedEntry'];
   appendClipboardVideoToQueue: IpcDepsRuntimeOptions['appendClipboardVideoToQueue'];
+  getChangelogSnapshot?: IpcDepsRuntimeOptions['getChangelogSnapshot'];
   getPlaylistBrowserSnapshot: IpcDepsRuntimeOptions['getPlaylistBrowserSnapshot'];
   appendPlaylistBrowserFile: IpcDepsRuntimeOptions['appendPlaylistBrowserFile'];
   playPlaylistBrowserIndex: IpcDepsRuntimeOptions['playPlaylistBrowserIndex'];
@@ -302,6 +303,7 @@ export function createMainIpcRuntimeServiceDeps(
     removeCharacterDictionaryManagedEntry: params.removeCharacterDictionaryManagedEntry,
     moveCharacterDictionaryManagedEntry: params.moveCharacterDictionaryManagedEntry,
     appendClipboardVideoToQueue: params.appendClipboardVideoToQueue,
+    getChangelogSnapshot: params.getChangelogSnapshot,
     getPlaylistBrowserSnapshot: params.getPlaylistBrowserSnapshot,
     appendPlaylistBrowserFile: params.appendPlaylistBrowserFile,
     playPlaylistBrowserIndex: params.playPlaylistBrowserIndex,