refactor(AgentManager): rename public attributes to private

- Changed `performance_metrics` to `_performance_metrics` and `request_queue` to `_request_queue`
- Set `request_queue` to `None` in `__init__` for lazy initialization
- Updated references in `update_performance_metrics`, `get_performance_summary`, and `SpacesApp`
- Improves encapsulation by indicating internal state

app.py

@@ -211,8 +211,8 @@ class AgentManager:
         self.config = config
         self.agents = {}
         self.agent_stats = {}
-        self.request_queue = asyncio.Queue(maxsize=config.config["max_concurrent_requests"])
-        self.performance_metrics = {
+        self._request_queue = None
+        self._performance_metrics = {
             "total_requests": 0,
             "successful_requests": 0,
             "failed_requests": 0,
@@ -288,12 +288,12 @@ class AgentManager:
     
     def update_performance_metrics(self, agent_type: str, response_time: float, success: bool):
         """Update performance metrics for monitoring."""
-        self.performance_metrics["total_requests"] += 1
+        self._performance_metrics["total_requests"] += 1
         
         if success:
-            self.performance_metrics["successful_requests"] += 1
+            self._performance_metrics["successful_requests"] += 1
         else:
-            self.performance_metrics["failed_requests"] += 1
+            self._performance_metrics["failed_requests"] += 1
         
         # Update agent-specific stats
         if agent_type in self.agent_stats:
@@ -314,30 +314,30 @@ class AgentManager:
             )
         
         # Update global metrics
-        self.performance_metrics["average_response_time"] = (
-            (self.performance_metrics["average_response_time"] * (self.performance_metrics["total_requests"] - 1) + response_time)
-            / self.performance_metrics["total_requests"]
+        self._performance_metrics["average_response_time"] = (
+            (self._performance_metrics["average_response_time"] * (self._performance_metrics["total_requests"] - 1) + response_time)
+            / self._performance_metrics["total_requests"]
         )
         
         # Add system metrics
-        self.performance_metrics["memory_usage"].append(psutil.virtual_memory().percent)
-        self.performance_metrics["cpu_usage"].append(psutil.cpu_percent())
-        self.performance_metrics["timestamps"].append(datetime.utcnow().isoformat())
+        self._performance_metrics["memory_usage"].append(psutil.virtual_memory().percent)
+        self._performance_metrics["cpu_usage"].append(psutil.cpu_percent())
+        self._performance_metrics["timestamps"].append(datetime.utcnow().isoformat())
         
         # Keep only recent metrics
         max_metrics = 1000
         for key in ["memory_usage", "cpu_usage", "timestamps"]:
-            if len(self.performance_metrics[key]) > max_metrics:
-                self.performance_metrics[key] = self.performance_metrics[key][-max_metrics:]
+            if len(self._performance_metrics[key]) > max_metrics:
+                self._performance_metrics[key] = self._performance_metrics[key][-max_metrics:]
     
     def get_performance_summary(self) -> Dict[str, Any]:
         """Get performance summary for monitoring."""
         return {
-            "total_requests": self.performance_metrics["total_requests"],
+            "total_requests": self._performance_metrics["total_requests"],
             "success_rate": (
-                self.performance_metrics["successful_requests"] / max(1, self.performance_metrics["total_requests"])
+                self._performance_metrics["successful_requests"] / max(1, self._performance_metrics["total_requests"])
             ),
-            "average_response_time": self.performance_metrics["average_response_time"],
+            "average_response_time": self._performance_metrics["average_response_time"],
             "current_memory_usage": psutil.virtual_memory().percent,
             "current_cpu_usage": psutil.cpu_percent(),
             "agent_stats": self.agent_stats,
@@ -777,7 +777,7 @@ class SpacesApp:
         """Get analytics data for plots and tables."""
         try:
             # Get performance metrics
-            metrics = self.agent_manager.performance_metrics
+            metrics = self.agent_manager._performance_metrics
             
             # Create metrics plot
             if len(metrics["timestamps"]) > 1: