Fallback to Flask UI when tkinter/_tkinter missing; avoid NameError and keep app launchable via Finder

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

mac_native.py

@@ -5,9 +5,16 @@ Native GUI using tkinter to generate One Piece progress reports without a web se
 
 import os
 import threading
+import webbrowser
+from datetime import datetime
+
+# Try to import tkinter; if unavailable, fall back to launching the Flask web UI
+try:
     import tkinter as tk
     from tkinter import ttk, messagebox, scrolledtext
-from datetime import datetime
+    TK_AVAILABLE = True
+except Exception:
+    TK_AVAILABLE = False
 
 # Reuse helper logic from app.py
 from app import current_week, format_date_range, get_latest_sunday, get_previous_sunday
@@ -161,7 +168,35 @@ def main():
 
 if __name__ == '__main__':
     try:
+        if TK_AVAILABLE:
             main()
+        else:
+            # Fallback: launch the Flask web UI in a background thread and open the browser
+            try:
+                from app import app
+            except Exception as _e:
+                raise RuntimeError(f"Tkinter not available and Flask app failed to import: {_e}")
+
+            def _run_server():
+                port = int(os.environ.get("PORT", 5000))
+                app.run(host="127.0.0.1", port=port, debug=False, use_reloader=False)
+
+            t = threading.Thread(target=_run_server, daemon=True)
+            t.start()
+            # Give the server a moment to start
+            import time
+            time.sleep(1.0)
+            port = os.environ.get("PORT", "5000")
+            try:
+                webbrowser.open(f"http://127.0.0.1:{port}/")
+            except Exception:
+                pass
+
+            try:
+                while t.is_alive():
+                    t.join(0.5)
+            except KeyboardInterrupt:
+                pass
     except Exception as e:
         import traceback, sys, os
         tb = traceback.format_exc()