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

src/renderer/state.ts

@@ -13,6 +13,7 @@ import type {
   SubtitleSidebarConfig,
   SubtitleCue,
   SubsyncSourceTrack,
+  YoutubePickerOpenPayload,
 } from '../types';
 
 export type KikuModalStep = 'select' | 'preview';
@@ -40,6 +41,12 @@ export type RendererState = {
   currentEpisodeFilter: number | null;
   currentEntryId: number | null;
 
+  youtubePickerModalOpen: boolean;
+  youtubePickerPayload: YoutubePickerOpenPayload | null;
+  youtubePickerPrimaryTrackId: string | null;
+  youtubePickerSecondaryTrackId: string | null;
+  youtubePickerStatus: string;
+
   kikuModalOpen: boolean;
   kikuSelectedCard: 1 | 2;
   kikuOriginalData: KikuDuplicateCardInfo | null;
@@ -131,6 +138,12 @@ export function createRendererState(): RendererState {
     currentEpisodeFilter: null,
     currentEntryId: null,
 
+    youtubePickerModalOpen: false,
+    youtubePickerPayload: null,
+    youtubePickerPrimaryTrackId: null,
+    youtubePickerSecondaryTrackId: null,
+    youtubePickerStatus: '',
+
     kikuModalOpen: false,
     kikuSelectedCard: 1,
     kikuOriginalData: null,