feat(config): unify mpv plugin options under main config and add CSS/Ani

- Replace subminer.conf plugin config with mpv.* fields in config.jsonc
- Add socketPath, backend, autoStartSubMiner, pauseUntilOverlayReady, aniskipEnabled/buttonKey, subminerBinaryPath to mpv config
- Add subtitleSidebar.css field; migrate legacy sidebar appearance fields
- Add paintOrder and WebkitTextStroke to subtitle style options
- Update default subtitle/sidebar fontFamily to CJK-first stack
- Fix overlay visible state surviving mpv y-r restart
- Fix live config saves applying subtitle CSS immediately to open overlays
- Migrate legacy primary/secondary subtitle appearance into subtitleStyle.css on load
- Switch AniSkip button key setting to click-to-learn key capture

launcher/commands/command-modules.test.ts

@@ -38,9 +38,14 @@ function createContext(overrides: Partial<LauncherCommandContext> = {}): Launche
     mpvSocketPath: '/tmp/subminer.sock',
     pluginRuntimeConfig: {
       socketPath: '/tmp/subminer.sock',
+      binaryPath: '',
+      backend: 'auto',
       autoStart: true,
       autoStartVisibleOverlay: true,
       autoStartPauseUntilReady: true,
+      texthookerEnabled: false,
+      aniskipEnabled: true,
+      aniskipButtonKey: 'TAB',
     },
     appPath: '/tmp/subminer.app',
     launcherJellyfinConfig: {},