feat(testing): stabilize simulation suite and fix gemini caching

api_hooks.py

@@ -53,6 +53,43 @@ class HookHandler(BaseHTTPRequestHandler):
                     events = list(app._api_event_queue)
                     app._api_event_queue.clear()
             self.wfile.write(json.dumps({'events': events}).encode('utf-8'))
+        elif self.path == '/api/gui/value':
+            # POST with {"field": "field_tag"} to get value
+            content_length = int(self.headers.get('Content-Length', 0))
+            body = self.rfile.read(content_length)
+            data = json.loads(body.decode('utf-8'))
+            field_tag = data.get("field")
+            print(f"[DEBUG] Hook Server: get_value for {field_tag}")
+            
+            event = threading.Event()
+            result = {"value": None}
+            
+            def get_val():
+                try:
+                    if field_tag in app._settable_fields:
+                        attr = app._settable_fields[field_tag]
+                        val = getattr(app, attr, None)
+                        print(f"[DEBUG] Hook Server: attr={attr}, val={val}")
+                        result["value"] = val
+                    else:
+                        print(f"[DEBUG] Hook Server: {field_tag} NOT in settable_fields")
+                finally:
+                    event.set()
+
+            with app._pending_gui_tasks_lock:
+                app._pending_gui_tasks.append({
+                    "action": "custom_callback",
+                    "callback": get_val
+                })
+            
+            if event.wait(timeout=2):
+                self.send_response(200)
+                self.send_header('Content-Type', 'application/json')
+                self.end_headers()
+                self.wfile.write(json.dumps(result).encode('utf-8'))
+            else:
+                self.send_response(504)
+                self.end_headers()
         elif self.path.startswith('/api/gui/value/'):
             # Generic endpoint to get the value of any settable field
             field_tag = self.path.split('/')[-1]