Fix healthcheck to verify PID and add DM-only conversational mode

- 6a: Change healthcheck in Dockerfile and docker-compose.yml to verify
  the PID file exists and the process is alive (kill -0) instead of
  testing SQLite connectivity, which only proves the DB file exists
- 6b: In DMs, skip !commands so MeshMonitor or other bots handle them.
  MeshAI only responds conversationally in DMs (no bang commands)

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

Dockerfile

@@ -74,9 +74,9 @@ VOLUME ["/data"]
 # Expose ttyd web config port
 EXPOSE 7682
 
-# Health check
+# Health check - verify bot process is alive via PID file
 HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
-    CMD python -c "import sqlite3; sqlite3.connect('/data/conversations.db').execute('SELECT 1')" || exit 1
+    CMD test -f /tmp/meshai.pid && kill -0 $(cat /tmp/meshai.pid) 2>/dev/null || exit 1
 
 # Entrypoint handles config and ttyd
 ENTRYPOINT ["/app/docker-entrypoint.sh"]

docker-compose.yml

@@ -53,7 +53,7 @@ services:
           memory: 64M
 
     healthcheck:
-      test: ["CMD", "python", "-c", "import sqlite3; sqlite3.connect('/data/conversations.db').execute('SELECT 1')"]
+      test: ["CMD-SHELL", "test -f /tmp/meshai.pid && kill -0 $(cat /tmp/meshai.pid) 2>/dev/null || exit 1"]
       interval: 30s
       timeout: 10s
       retries: 3

meshai/router.py

@@ -80,12 +80,11 @@ class MessageRouter:
         if message.sender_id == self.connector.my_node_id:
             return False
 
-        # Check if DM
+        # Check if DM — conversational mode only, skip !commands
+        # (let MeshMonitor or other bots handle bang commands in DMs)
         if message.is_dm:
-            # In DMs, let commands through to dispatcher but skip !commands
-            # that should be handled by other bots (like MeshMonitor)
             if self.dispatcher.is_command(message.text):
-                return True
+                return False
             return self.config.bot.respond_to_dms
 
         # Check channel filtering