fix: font stack, sparklines, and DA1 response issues

- Restore terminal.options.fontFamily assignment for proper font stack handling
- Add dynamic service registration to DockerStatsCollector for docker watch mode
- Remove force_redraw on reconnect that caused DA1 responses to display as text

tests/test_local_server_websocket_integration.py

@@ -81,19 +81,12 @@ async def test_websocket_creates_session_on_resize(tmp_path):
         await client.close()
 
     assert created["args"] == ("test", 90, 25)
-    # Reconnect should trigger redraw without creating a new session
-    called = {"redraw": 0, "stdin": 0}
+    # Reconnect to an existing session should reuse it and send replay buffer
 
     class DummySession:
         def is_running(self):
             return True
 
-        async def force_redraw(self):
-            called["redraw"] += 1
-
-        async def send_bytes(self, data: bytes):
-            called["stdin"] += 1
-
     server.session_manager.routes["test"] = "sid"
     server.session_manager.sessions["sid"] = DummySession()
 
@@ -111,9 +104,6 @@ async def test_websocket_creates_session_on_resize(tmp_path):
     finally:
         await client.close()
 
-    assert called["redraw"] == 1
-    assert called["stdin"] == 1
-
 
 @pytest.mark.asyncio
 async def test_websocket_ping_pong(tmp_path):