Fix tray icon event handling on Windows

- Add Windows message queue pumping in process_events()
- PeekMessageW/TranslateMessage/DispatchMessageW for event delivery
- Menu clicks and tray events now work properly

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

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

agent/src/tray/mod.rs

@@ -12,6 +12,11 @@ use std::sync::Arc;
 use tray_icon::{Icon, TrayIcon, TrayIconBuilder, TrayIconEvent};
 use tracing::{info, warn};
 
+#[cfg(windows)]
+use windows::Win32::UI::WindowsAndMessaging::{
+    PeekMessageW, TranslateMessage, DispatchMessageW, MSG, PM_REMOVE,
+};
+
 /// Events that can be triggered from the tray menu
 #[derive(Debug, Clone)]
 pub enum TrayAction {
@@ -83,6 +88,10 @@ impl TrayController {
 
     /// Process pending menu events (call this from the main loop)
     pub fn process_events(&self) -> Option<TrayAction> {
+        // Pump Windows message queue to process tray icon events
+        #[cfg(windows)]
+        pump_windows_messages();
+
         // Check for menu events
         if let Ok(event) = MenuEvent::receiver().try_recv() {
             if event.id == self.end_session_item.id() {
@@ -107,6 +116,19 @@ impl TrayController {
     }
 }
 
+/// Pump the Windows message queue to process tray icon events
+#[cfg(windows)]
+fn pump_windows_messages() {
+    unsafe {
+        let mut msg = MSG::default();
+        // Process all pending messages
+        while PeekMessageW(&mut msg, None, 0, 0, PM_REMOVE).as_bool() {
+            let _ = TranslateMessage(&msg);
+            DispatchMessageW(&msg);
+        }
+    }
+}
+
 /// Create a simple default icon (green circle for connected)
 fn create_default_icon() -> Result<Icon> {
     // Create a simple 32x32 green icon