fix: transport AppImage args via env and gate restart on app-ping

- Transport Linux AppImage CLI args through SUBMINER_APP_ARGC/ARG_* env vars instead of argv
- Add --app-ping command to probe single-instance lock ownership (exit 0 = running, 1 = not)
- Gate manual restart: poll app-ping until old app releases lock, then until new app owns it
- Preserve user-paused playback when disarming the auto-play-ready gate on restart
- Snapshot subtitles before connection side effects (sub-visibility hide) can suppress them
- Reapply overlay bounds after first show for Hyprland compatibility

src/main/runtime/update/fetch-adapter.test.ts

@@ -101,6 +101,8 @@ test('createCurlFetch requests updater metadata without Electron networking', as
     '--show-error',
     '--connect-timeout',
     '30',
+    '--max-time',
+    '60',
     '--header',
     'Accept: application/vnd.github+json',
     '--header',
@@ -108,4 +110,5 @@ test('createCurlFetch requests updater metadata without Electron networking', as
     'https://api.github.com/repos/ksyasuda/SubMiner/releases',
   ]);
   assert.equal(calls[0]?.options.encoding, 'buffer');
+  assert.equal(calls[0]?.options.timeout, 65_000);
 });

src/main/runtime/update/fetch-adapter.ts

@@ -67,7 +67,16 @@ export function createCurlFetch(options: CurlFetchOptions = {}): FetchLike {
   const curlPath = options.curlPath ?? '/usr/bin/curl';
 
   return async (url, init = {}) => {
-    const args = ['--fail', '--location', '--silent', '--show-error', '--connect-timeout', '30'];
+    const args = [
+      '--fail',
+      '--location',
+      '--silent',
+      '--show-error',
+      '--connect-timeout',
+      '30',
+      '--max-time',
+      '60',
+    ];
     addHeaderArgs(args, init.headers);
     args.push(url);
     const body = await new Promise<Buffer>((resolve, reject) => {
@@ -77,6 +86,7 @@ export function createCurlFetch(options: CurlFetchOptions = {}): FetchLike {
         {
           encoding: 'buffer',
           maxBuffer: 600 * 1024 * 1024,
+          timeout: 65_000,
         },
         (error, stdout, stderr) => {
           if (error) {