Hide console window, add Debug Window tray option

- Hide console window by default (windows_subsystem = "windows")
- Add "Show Debug Window" menu item to tray
- AllocConsole when debug window requested
- Console shows logs for troubleshooting

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

agent/src/tray/mod.rs

@@ -22,7 +22,7 @@ use windows::Win32::UI::WindowsAndMessaging::{
 pub enum TrayAction {
     EndSession,
     ShowDetails,
-    // Future: OpenChat,
+    ShowDebugWindow,
 }
 
 /// Tray icon controller
@@ -30,6 +30,7 @@ pub struct TrayController {
     _tray_icon: TrayIcon,
     menu: Menu,
     end_session_item: MenuItem,
+    debug_item: MenuItem,
     status_item: MenuItem,
     exit_requested: Arc<AtomicBool>,
 }
@@ -57,11 +58,15 @@ impl TrayController {
             MenuItem::new("Managed by Administrator", false, None)
         };
 
+        // Debug window option (always available)
+        let debug_item = MenuItem::new("Show Debug Window", true, None);
+
         // Build menu
         let menu = Menu::new();
         menu.append(&status_item)?;
         menu.append(&machine_item)?;
         menu.append(&separator)?;
+        menu.append(&debug_item)?;
         menu.append(&end_session_item)?;
 
         // Create tray icon
@@ -79,6 +84,7 @@ impl TrayController {
             _tray_icon: tray_icon,
             menu,
             end_session_item,
+            debug_item,
             status_item,
             exit_requested,
         })
@@ -107,6 +113,10 @@ impl TrayController {
                 self.exit_requested.store(true, Ordering::SeqCst);
                 return Some(TrayAction::EndSession);
             }
+            if event.id == self.debug_item.id() {
+                info!("Debug window requested from tray menu");
+                return Some(TrayAction::ShowDebugWindow);
+            }
         }
 
         // Check for tray icon events (like double-click)