[codex] Make Windows mpv shortcut self-contained (#40)

src/config/definitions/options-integrations.ts

@@ -238,6 +238,13 @@ export function buildIntegrationConfigOptionRegistry(
       description:
         'Optional external Yomitan Electron profile path to use in read-only mode for shared dictionaries/settings. Example: ~/.config/gsm_overlay',
     },
+    {
+      path: 'mpv.executablePath',
+      kind: 'string',
+      defaultValue: defaultConfig.mpv.executablePath,
+      description:
+        'Optional absolute path to mpv.exe for Windows launch flows. Leave empty to auto-discover from SUBMINER_MPV_PATH or PATH.',
+    },
     {
       path: 'jellyfin.enabled',
       kind: 'boolean',