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

src/shared/mpv-socket-path.ts

@@ -0,0 +1,3 @@
+export function getDefaultMpvSocketPath(platform: NodeJS.Platform = process.platform): string {
+  return platform === 'win32' ? '\\\\.\\pipe\\subminer-socket' : '/tmp/subminer-socket';
+}

src/shared/subminer-plugin-script-opts.ts

@@ -0,0 +1,37 @@
+import type { MpvBackend } from '../types/config';
+
+export interface SubminerPluginRuntimeScriptOptConfig {
+  socketPath: string;
+  binaryPath?: string;
+  backend: MpvBackend;
+  autoStart: boolean;
+  autoStartVisibleOverlay: boolean;
+  autoStartPauseUntilReady: boolean;
+  texthookerEnabled: boolean;
+  aniskipEnabled: boolean;
+  aniskipButtonKey: string;
+}
+
+function boolScriptOpt(value: boolean): 'yes' | 'no' {
+  return value ? 'yes' : 'no';
+}
+
+export function buildSubminerPluginRuntimeScriptOptParts(
+  runtimeConfig: SubminerPluginRuntimeScriptOptConfig,
+  fallbackAppPath: string,
+): string[] {
+  const binaryPath = runtimeConfig.binaryPath?.trim() || fallbackAppPath;
+  return [
+    `subminer-binary_path=${binaryPath}`,
+    `subminer-socket_path=${runtimeConfig.socketPath}`,
+    `subminer-backend=${runtimeConfig.backend}`,
+    `subminer-auto_start=${boolScriptOpt(runtimeConfig.autoStart)}`,
+    `subminer-auto_start_visible_overlay=${boolScriptOpt(runtimeConfig.autoStartVisibleOverlay)}`,
+    `subminer-auto_start_pause_until_ready=${boolScriptOpt(
+      runtimeConfig.autoStartPauseUntilReady,
+    )}`,
+    `subminer-texthooker_enabled=${boolScriptOpt(runtimeConfig.texthookerEnabled)}`,
+    `subminer-aniskip_enabled=${boolScriptOpt(runtimeConfig.aniskipEnabled)}`,
+    `subminer-aniskip_button_key=${runtimeConfig.aniskipButtonKey}`,
+  ];
+}