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

docs-site/index.md

@@ -51,8 +51,8 @@ features:
   - icon:
       src: /assets/video.svg
       alt: Video playback icon
-    title: YouTube & Whisper
-    details: Play YouTube URLs or searches with native subtitles, or generate them with whisper.cpp and optional AI cleanup.
+    title: YouTube Playback
+    details: Play YouTube URLs or ytsearch targets directly — SubMiner automatically selects and loads subtitles for the video.
     link: /usage#youtube-playback
     linkText: YouTube playback
   - icon:
@@ -72,10 +72,10 @@ features:
   - icon:
       src: /assets/tokenization.svg
       alt: Tracking chart icon
-    title: Immersion Tracking
-    details: Logs watch time, words encountered, and cards mined to SQLite, then surfaces the same data in a local stats dashboard with rollups and session drill-down.
+    title: Stats Dashboard
+    details: Browse session history, streak calendars, vocabulary frequency, and per-series progress in a local dashboard — then mine cards straight from your viewing history.
     link: /immersion-tracking
-    linkText: Stats details
+    linkText: Dashboard & tracking
   - icon:
       src: /assets/cross-platform.svg
       alt: Cross-platform icon
@@ -120,7 +120,7 @@ const demoAssetVersion = '20260223-2';
       <div class="workflow-step" style="animation-delay: 240ms">
         <div class="step-number">05</div>
         <div class="step-title">Track</div>
-        <div class="step-desc">Review immersion history and repeat high-value patterns over time.</div>
+        <div class="step-desc">Open the stats dashboard to review sessions, vocabulary trends, and mine cards from past viewing history.</div>
       </div>
     </div>
   </section>