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/window/panel/components/globalmenu.py

@@ -153,7 +153,11 @@ class SystemDropdown(ModusDropdown):
                 dropdown_option("Restart", "", "systemctl reboot"),
                 dropdown_option("Shut Down", "", "shutdown now"),
                 dropdown_divider("---------------------"),
-                dropdown_option("Lock Screen", "󰘳     L", "hyprlock"),
+                dropdown_option(
+                    "Lock Screen",
+                    "󰘳     L",
+                    'fabric-cli exec modus "lock_screen.lock()"',
+                ),
             ],
             **kwargs,
         )