fix exit hanging

src/cli/sync_dashboard.py

@@ -26,7 +26,17 @@ DEFAULT_SYNC_INTERVAL = 300
 # SPINNER_FRAMES = ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"]
 # Alternative spinners you could use:
 # SPINNER_FRAMES = ["◢", "◣", "◤", "◥"]  # Rotating triangle
-SPINNER_FRAMES = ["▰▱▱▱▱", "▰▰▱▱▱", "▰▰▰▱▱", "▰▰▰▰▱", "▰▰▰▰▰", "▱▰▰▰▰", "▱▱▰▰▰", "▱▱▱▰▰", "▱▱▱▱▰"]  # Loading bar
+SPINNER_FRAMES = [
+    "▰▱▱▱▱",
+    "▰▰▱▱▱",
+    "▰▰▰▱▱",
+    "▰▰▰▰▱",
+    "▰▰▰▰▰",
+    "▱▰▰▰▰",
+    "▱▱▰▰▰",
+    "▱▱▱▰▰",
+    "▱▱▱▱▰",
+]  # Loading bar
 # SPINNER_FRAMES = ["⣾", "⣽", "⣻", "⢿", "⡿", "⣟", "⣯", "⣷"]  # Braille dots
 # SPINNER_FRAMES = ["◐", "◓", "◑", "◒"]  # Circle quarters
 # SPINNER_FRAMES = ["⠁", "⠂", "⠄", "⡀", "⢀", "⠠", "⠐", "⠈"]  # Braille orbit
@@ -296,6 +306,13 @@ class SyncDashboard(App):
         self._log_to_task("archive", "Dashboard initialized. Waiting to start sync...")
         self._mounted.set()
 
+    def on_unmount(self) -> None:
+        """Clean up when the dashboard is unmounted."""
+        if self._countdown_task:
+            self._countdown_task.cancel()
+        if self._spinner_task:
+            self._spinner_task.cancel()
+
     def on_list_view_selected(self, event: ListView.Selected) -> None:
         """Handle task selection from the list."""
         if isinstance(event.item, TaskListItem):
@@ -677,4 +694,13 @@ async def run_dashboard_sync():
                 await asyncio.sleep(1)
 
     # Run dashboard and sync loop concurrently
-    await asyncio.gather(dashboard.run_async(), sync_loop())
+    # When dashboard exits, cancel the sync loop
+    sync_task = asyncio.create_task(sync_loop())
+    try:
+        await dashboard.run_async()
+    finally:
+        sync_task.cancel()
+        try:
+            await sync_task
+        except asyncio.CancelledError:
+            pass