perf(gui): Resolve massive frametime bloat by throttling telemetry and optimizing UI updates

reproduce_delay.py

@@ -0,0 +1,18 @@
+import time
+from ai_client import get_gemini_cache_stats
+
+def reproduce_delay():
+    print("Starting reproduction of Gemini cache list delay...")
+    
+    start_time = time.time()
+    try:
+        stats = get_gemini_cache_stats()
+        elapsed = (time.time() - start_time) * 1000.0
+        print(f"get_gemini_cache_stats() took {elapsed:.2f}ms")
+        print(f"Stats: {stats}")
+    except Exception as e:
+        print(f"Error calling get_gemini_cache_stats: {e}")
+        print("Note: This might fail if no valid credentials.toml exists or API key is invalid.")
+
+if __name__ == "__main__":
+    reproduce_delay()