Project actions: run commands from header on web + mobile, with SSH-forward URL opening (#542)

* feat: add project actions in header with reliable terminal run flow

- Add per-project Actions settings with icons, platform filters, and default action
- Run/stop actions from header using terminal tabs, including Ctrl+C then force-kill fallback
- Improve terminal UX with stable selection, resize handling, and smarter URL auto-open for localhost ports

* feat: add project actions UI with refined header dropdown behavior

* feat: add parent-session back button in chat

* fix: make web and desktop dev modes reliable and conflict-free

- Separate desktop and web dev ports to avoid collisions
- Add robust process-tree shutdown so Ctrl+C cleans sidecars
- Add true web HMR mode and keep service worker out of dev

* fix: linux safe scripts for dev

* feat: run project actions on web and add desktop SSH forward URL opening

* feat: add mobile project actions button with terminal tabs and tighter tab UI

* revert: remove experimental mobile terminal selection UI

* feat: show Add action button in header when empty

* fix: make retry countdown human-readable in status row

* fix: prevent nav rail actions from firing through overlays

packages/desktop/scripts/desktop-dev.mjs

@@ -13,10 +13,70 @@ function spawnProcess(command, args, opts = {}) {
     cwd: repoRoot,
     env: { ...process.env },
     stdio: 'inherit',
+    detached: process.platform !== 'win32',
     ...opts,
   });
 }
 
+function waitForExit(child, timeoutMs) {
+  return new Promise((resolve) => {
+    if (!child || child.exitCode !== null || child.signalCode !== null) {
+      resolve();
+      return;
+    }
+
+    const onExit = () => {
+      clearTimeout(timer);
+      resolve();
+    };
+
+    const timer = setTimeout(() => {
+      child.off('exit', onExit);
+      resolve();
+    }, timeoutMs);
+
+    child.once('exit', onExit);
+  });
+}
+
+function signalChild(child, signal) {
+  if (!child || child.exitCode !== null || child.signalCode !== null) {
+    return;
+  }
+
+  try {
+    if (process.platform !== 'win32') {
+      process.kill(-child.pid, signal);
+      return;
+    }
+  } catch {
+  }
+
+  try {
+    child.kill(signal);
+  } catch {
+  }
+}
+
+async function stopChildTree(child) {
+  if (!child || child.exitCode !== null || child.signalCode !== null) {
+    return;
+  }
+
+  signalChild(child, 'SIGINT');
+  await waitForExit(child, 2500);
+
+  if (child.exitCode === null && child.signalCode === null) {
+    signalChild(child, 'SIGTERM');
+    await waitForExit(child, 2500);
+  }
+
+  if (child.exitCode === null && child.signalCode === null) {
+    signalChild(child, 'SIGKILL');
+    await waitForExit(child, 1000);
+  }
+}
+
 async function main() {
   const tauriProcess = spawnProcess('bun', [
     '--cwd',
@@ -37,19 +97,7 @@ async function main() {
     }
     cleaning = true;
 
-    const stopChild = (child, label) => {
-      if (!child || child.killed) {
-        return;
-      }
-      try {
-        child.kill('SIGINT');
-      } catch (error) {
-        console.warn(`[desktop:dev] Failed to stop ${label}:`, error);
-      }
-    };
-
-    stopChild(tauriProcess, 'Tauri dev process');
-
+    await stopChildTree(tauriProcess);
     process.exit(typeof code === 'number' ? code : 0);
   };