add app control server for launcher-to-app attachment

- Launcher detects a running app via control socket and attaches without spawning a new process
- Own-lifecycle app launches now pass --background --managed-playback; borrowed apps skip --background
- Separate plain subtitle websocket (tokens: []) from annotation websocket
- Default pauseVideoOnHover to true; update docs and config.example.jsonc
- Setup: remove plugin readiness card, add Open SubMiner Settings button

src/main/runtime/tray-main-deps.test.ts

@@ -31,7 +31,6 @@ test('tray main deps builders return mapped handlers', () => {
     openFirstRunSetupWindow: () => calls.push('setup'),
     showWindowsMpvLauncherSetup: () => true,
     openYomitanSettings: () => calls.push('yomitan'),
-    openRuntimeOptionsPalette: () => calls.push('runtime-options'),
     openConfigSettingsWindow: () => calls.push('configuration'),
     openJellyfinSetupWindow: () => calls.push('jellyfin'),
     isJellyfinConfigured: () => true,
@@ -53,7 +52,6 @@ test('tray main deps builders return mapped handlers', () => {
     openWindowsMpvLauncherSetup: () => calls.push('open-windows-mpv'),
     showWindowsMpvLauncherSetup: true,
     openYomitanSettings: () => calls.push('open-yomitan'),
-    openRuntimeOptions: () => calls.push('open-runtime-options'),
     openConfigSettings: () => calls.push('open-configuration'),
     openJellyfinSetup: () => calls.push('open-jellyfin'),
     showJellyfinDiscovery: true,