Improve cancellation logic and sync performance.

- Implement explicit threading.Event propagation for robust GUI cancellation.
- Optimize file synchronization by skipping hash validation for up-to-date files (matching size and timestamp).
- Update Windows long path support to correctly handle UNC network shares.
- Refactor configuration management to eliminate global state and improve modularity.
- Remove requests.get monkey-patch in GUI.
- Delete CLAUDE.md as it is no longer required.

sharepoint_gui.py

@@ -9,16 +9,6 @@ import requests
 # --- Global Stop Flag ---
 stop_event = threading.Event()
 
-# For at stoppe uden at ændre download_sharepoint.py, "patcher" vi requests.get
-# så den tjekker stop_event før hver anmodning.
-original_get = requests.get
-def patched_get(*args, **kwargs):
-    if stop_event.is_set():
-        raise InterruptedError("Synkronisering afbrudt af brugeren.")
-    return original_get(*args, **kwargs)
-
-requests.get = patched_get
-
 # --- Logging Handler for GUI ---
 class TextboxHandler(logging.Handler):
     def __init__(self, textbox):
@@ -149,7 +139,8 @@ class SharepointApp(ctk.CTk):
 
     def run_sync(self):
         try:
-            download_sharepoint.main()
+            config = download_sharepoint.load_config("connection_info.txt")
+            download_sharepoint.main(config=config, stop_event=stop_event)
             if stop_event.is_set():
                 self.status_label.configure(text="Status: Afbrudt", text_color="red")
             else: