Release 3.8.2.6: perceived-speed UX — search, tray hide, core warm, SSE.

Server search/hotkeys; Windows close-to-tray; background EnsureCore; SSE status with rare poll fallback.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/trayhost/tray.go

@@ -4,6 +4,7 @@ package trayhost
 type Hooks struct {
 	Connect    func()
 	Disconnect func()
+	Show       func()
 	Quit       func()
 	IsUp       func() bool
 }