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

config/mods.toml

@@ -23,5 +23,5 @@ on-clicked = "python3 -m utils.google_lens_cli"
 #
 # [[Mods.terminal.options]]
 # label = "Terminal but scary"
-# on-clicked = "ghostty"
+# on-clicked = "zen-browser"
 # divider = true