Add crash-safe launcher to mac_native.py: show dialog and write traceback to ~/media_episodes_viewer_error.log

Co-authored-by: Copilot <[email protected]>

mac_native.py

@@ -160,4 +160,26 @@ def main():
 
 
 if __name__ == '__main__':
+    try:
         main()
+    except Exception as e:
+        import traceback, sys, os
+        tb = traceback.format_exc()
+        # Try to show a GUI error dialog if possible
+        try:
+            import tkinter as _tk
+            from tkinter import messagebox as _mb
+            _root = _tk.Tk()
+            _root.withdraw()
+            _mb.showerror("Launch Error", f"Error starting app:\n{e}\n\nA log was written to ~/media_episodes_viewer_error.log")
+            _root.destroy()
+        except Exception:
+            pass
+        # Always write traceback to a known file for debugging
+        try:
+            with open(os.path.expanduser('~/media_episodes_viewer_error.log'), 'w') as fh:
+                fh.write(tb)
+        except Exception:
+            pass
+        # Re-raise so py2app shows the launch error dialog as well
+        raise