Add thread safety to MeshConnector node caches and StatusData

- 4a: Add threading.Lock to MeshConnector protecting _node_names and
  _node_positions dicts that are read/written from Meshtastic's pubsub
  thread callbacks (_on_receive, _on_node_update, _cache_node_info)
  and read from async code (get_node_position, get_node_name)
- 4b: Add threading.Lock to StatusData protecting counters and activity
  list that are written from the async event loop and read from the
  HTTP server thread in to_dict()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

meshai/connector.py

@@ -2,6 +2,7 @@
 
 import asyncio
 import logging
+import threading
 from dataclasses import dataclass, field
 from typing import Callable, Optional
 
@@ -46,6 +47,7 @@ class MeshConnector:
         self._node_names: dict[str, str] = {}
         self._connected = False
         self._loop: Optional[asyncio.AbstractEventLoop] = None
+        self._lock = threading.Lock()
 
     @property
     def connected(self) -> bool:
@@ -127,6 +129,7 @@ class MeshConnector:
         if not self._interface:
             return
 
+        with self._lock:
             for node_id, node in self._interface.nodes.items():
                 # Cache name
                 if user := node.get("user"):
@@ -144,6 +147,7 @@ class MeshConnector:
         """Handle node info updates."""
         node_id = f"!{node['num']:08x}"
 
+        with self._lock:
             # Update name cache
             if user := node.get("user"):
                 name = user.get("shortName") or user.get("longName") or node_id
@@ -175,8 +179,11 @@ class MeshConnector:
             # Determine if DM (sent directly to us, not broadcast)
             is_dm = to_num == self._my_node_id
 
+            with self._lock:
                 # Get sender name
                 sender_name = self._node_names.get(sender_num, sender_num)
+                # Get position if available
+                position = self._node_positions.get(sender_num)
 
             # Create message object
             msg = MeshMessage(
@@ -189,8 +196,8 @@ class MeshConnector:
             )
 
             # Attach position if available
-            if sender_num in self._node_positions:
-                msg._position = self._node_positions[sender_num]
+            if position:
+                msg._position = position
 
             # Schedule callback on event loop
             self._loop.call_soon_threadsafe(
@@ -258,6 +265,7 @@ class MeshConnector:
         Returns:
             Tuple of (latitude, longitude) or None if not available
         """
+        with self._lock:
             return self._node_positions.get(node_id)
 
     def get_node_name(self, node_id: str) -> str:
@@ -269,4 +277,5 @@ class MeshConnector:
         Returns:
             Node name or the node ID if name not available
         """
+        with self._lock:
             return self._node_names.get(node_id, node_id)

meshai/web_status.py

@@ -3,6 +3,7 @@
 import asyncio
 import json
 import logging
+import threading
 import time
 from datetime import datetime
 from http.server import BaseHTTPRequestHandler, HTTPServer
@@ -18,6 +19,7 @@ class StatusData:
     """Container for status information."""
 
     def __init__(self):
+        self._lock = threading.Lock()
         self.start_time = time.time()
         self.message_count = 0
         self.response_count = 0
@@ -29,6 +31,7 @@ class StatusData:
 
     def record_message(self, sender_id: str, sender_name: str):
         """Record an incoming message."""
+        with self._lock:
             self.message_count += 1
             self.last_message_time = time.time()
             self.connected_nodes.add(sender_id)
@@ -43,10 +46,12 @@ class StatusData:
 
     def record_response(self):
         """Record an outgoing response."""
+        with self._lock:
             self.response_count += 1
 
     def record_error(self, error: str):
         """Record an error."""
+        with self._lock:
             self.error_count += 1
             self.recent_activity.append({
                 "type": "error",
@@ -75,6 +80,7 @@ class StatusData:
 
     def to_dict(self, include_activity: bool = False) -> dict:
         """Convert to dictionary for JSON response."""
+        with self._lock:
             data = {
                 "status": "online",
                 "uptime": self.get_uptime(),
@@ -90,7 +96,7 @@ class StatusData:
                 data["last_message_ago"] = int(time.time() - self.last_message_time)
 
             if include_activity:
-            data["recent_activity"] = self.recent_activity
+                data["recent_activity"] = list(self.recent_activity)
 
         return data