desktop/devtools: habilitar F12/Ctrl+Shift+I e menu de contexto para abrir DevTools

- src-tauri: adiciona comando open_devtools que chama window.open_devtools()
- frontend: listeners para F12/Ctrl+Shift+I e botão direito com Ctrl/Shift

Facilita depuração de UI no executável Tauri.

apps/desktop/src-tauri/src/lib.rs

@@ -32,6 +32,12 @@ fn stop_machine_agent(state: tauri::State<AgentRuntime>) -> Result<(), String> {
     Ok(())
 }
 
+#[tauri::command]
+fn open_devtools(window: tauri::WebviewWindow) -> Result<(), String> {
+    window.open_devtools();
+    Ok(())
+}
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
@@ -44,7 +50,8 @@ pub fn run() {
             collect_machine_profile,
             collect_machine_inventory,
             start_machine_agent,
-            stop_machine_agent
+            stop_machine_agent,
+            open_devtools
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");