feat(gui): Add auto-scroll, blinking history, and reactive API events

api_hooks.py

@@ -42,6 +42,45 @@ class HookHandler(BaseHTTPRequestHandler):
             if hasattr(app, 'perf_monitor'):
                 metrics = app.perf_monitor.get_metrics()
             self.wfile.write(json.dumps({'performance': metrics}).encode('utf-8'))
+        elif self.path == '/api/events':
+            # Long-poll or return current event queue
+            self.send_response(200)
+            self.send_header('Content-Type', 'application/json')
+            self.end_headers()
+            events = []
+            if hasattr(app, '_api_event_queue'):
+                with app._api_event_queue_lock:
+                    events = list(app._api_event_queue)
+                    app._api_event_queue.clear()
+            self.wfile.write(json.dumps({'events': events}).encode('utf-8'))
+        elif self.path.startswith('/api/gui/value/'):
+            # Generic endpoint to get the value of any settable field
+            field_tag = self.path.split('/')[-1]
+            event = threading.Event()
+            result = {"value": None}
+            
+            def get_val():
+                try:
+                    if field_tag in app._settable_fields:
+                        attr = app._settable_fields[field_tag]
+                        result["value"] = getattr(app, attr, None)
+                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 == '/api/gui/diagnostics':
             # Safe way to query multiple states at once via the main thread queue
             event = threading.Event()
@@ -137,6 +176,12 @@ class HookServer:
             self.app._pending_gui_tasks = []
         if not hasattr(self.app, '_pending_gui_tasks_lock'):
             self.app._pending_gui_tasks_lock = threading.Lock()
+        
+        # Event queue for test script subscriptions
+        if not hasattr(self.app, '_api_event_queue'):
+            self.app._api_event_queue = []
+        if not hasattr(self.app, '_api_event_queue_lock'):
+            self.app._api_event_queue_lock = threading.Lock()
             
         self.server = HookServerInstance(('127.0.0.1', self.port), HookHandler, self.app)
         self.thread = threading.Thread(target=self.server.serve_forever, daemon=True)