fix: resolve wifi crashes, shell injections, race conditions, and add debug mode

- Remove transient NEED_AUTH/DISCONNECTED error paths from wifi connect
- Guard double-callback in connect_wifi_bssid/connect_wifi_with_password
- Shell-quote user paths in wallpaper, screenshot, screenrecorder services
- Fix OSD hide-timer use-after-free and applet_window stale source ID
- Fix brightness poll timer leak on read failure
- Fix spotlight search stale idle source removal
- Lock dbusmenu _cache mutation under _registry_lock
- Fix entry.revision written outside _registry_lock scope
- Add fabric-cli exec wrapper for lock screen (lock_screen.lock())
- Replace hyprlock with lock screen in power menu and dropdown
- Add debug mode toggle in settings (controls log verbosity)
- Add diagnostic logging to globalmenu click chain

src/shared/data.py

@@ -20,13 +20,11 @@ def _get_wallpaper_path() -> str:
         custom = get_config("wallpapers_dir")
         if custom:
             return os.path.expanduser(str(custom))
-    except Exception:
-        pass
+    except Exception as e:
+        logger.warning(f"[data] Failed to load wallpapers_dir from config: {e}")
     return f"{HOME_DIR}/Pictures/Wallpapers"
 
 
-WALLPAPER_PATH = _get_wallpaper_path()
-WALLPAPER_THUMBS_PATH = f"{WALLPAPER_PATH}/.thumbnails"
 WALLPAPERS_THUMBNAILS_SIZE = 200
 WALLPAPERS_DIR_DEFAULT = get_relative_path("../assets/wallpapers_example/")
 

src/shared/dialogs/wifi_password_dialog.py

@@ -226,8 +226,12 @@ class WiFiPasswordDialog(Window):
     def _connection_timeout(self):
         if self.is_connecting:
             self.is_connecting = False
-            self.join_button.set_sensitive(True)
-            self.show_error("Connection timeout. Please try again.")
+            self.connection_timeout_id = None
+            try:
+                self.join_button.set_sensitive(True)
+                self.show_error("Connection timeout. Please try again.")
+            except Exception:
+                pass
         return False
 
     def show_dialog(self):

src/shared/window/applet_window.py

@@ -102,4 +102,5 @@ class AppletWindow(PopupWindow):
             self.dismiss_layer.destroy()
         if self._hide_timeout_id is not None:
             GLib.source_remove(self._hide_timeout_id)
+            self._hide_timeout_id = None
         super().destroy()