feat: add app-owned YouTube subtitle flow with absPlayer-style parsing (#31)

* fix: harden preload argv parsing for popup windows

* fix: align youtube playback with shared overlay startup

* fix: unwrap mpv youtube streams for anki media mining

* docs: update docs for youtube subtitle and mining flow

* refactor: unify cli and runtime wiring for startup and youtube flow

* feat: update subtitle sidebar overlay behavior

* chore: add shared log-file source for diagnostics

* fix(ci): add changelog fragment for immersion changes

* fix: address CodeRabbit review feedback

* fix: persist canonical title from youtube metadata

* style: format stats library tab

* fix: address latest review feedback

* style: format stats library files

* test: stub launcher youtube deps in CI

* test: isolate launcher youtube flow deps

* test: stub launcher youtube deps in failing case

* test: force x11 backend in launcher ci harness

* test: address latest review feedback

* fix(launcher): preserve user YouTube ytdl raw options

* docs(backlog): update task tracking notes

* fix(immersion): special-case youtube media paths in runtime and tracking

* feat(stats): improve YouTube media metadata and picker key handling

* fix(ci): format stats media library hook

* fix: address latest CodeRabbit review items

* docs: update youtube release notes and docs

* feat: auto-load youtube subtitles before manual picker

* fix: restore app-owned youtube subtitle flow

* docs: update youtube playback docs and config copy

* refactor: remove legacy youtube launcher mode plumbing

* fix: refine youtube subtitle startup binding

* docs: clarify youtube subtitle startup behavior

* fix: address PR #31 latest review follow-ups

* fix: address PR #31 follow-up review comments

* test: harden youtube picker test harness

* udpate backlog

* fix: add timeout to youtube metadata probe

* docs: refresh youtube and stats docs

* update backlog

* update backlog

* chore: release v0.9.0

launcher/smoke.e2e.test.ts

@@ -310,6 +310,7 @@ test(
       const appStartPath = path.join(smokeCase.artifactsDir, 'fake-app-start.log');
       const appStopPath = path.join(smokeCase.artifactsDir, 'fake-app-stop.log');
       await waitForJsonLines(appStartPath, 1);
+      await waitForJsonLines(appStopPath, 1);
 
       const appStartEntries = readJsonLines(appStartPath);
       const appStopEntries = readJsonLines(appStopPath);
@@ -324,7 +325,7 @@ test(
       assert.match(result.stdout, /Starting SubMiner overlay/i);
 
       assert.equal(appStartEntries.length, 1);
-      assert.equal(appStopEntries.length, 0);
+      assert.equal(appStopEntries.length, 1);
       assert.equal(mpvEntries.length >= 1, true);
 
       const appStartArgs = appStartEntries[0]?.argv;