fix(webui): clear stale run status on reconnect

nanobot/channels/websocket.py

@@ -346,11 +346,7 @@ class WebSocketChannel(BaseChannel):
     async def _hydrate_after_subscribe(self, chat_id: str) -> None:
         """Replay goal/run strip state after subscribe (same-process refresh)."""
         await self._maybe_push_active_goal_state(chat_id)
-        t0 = websocket_turn_wall_started_at(chat_id)
-        if t0 is not None:
-            await self.send_goal_status(chat_id, "running", started_at=t0)
-        else:
-            await self.send_goal_status(chat_id, "idle")
+        await self._maybe_push_turn_run_wall_clock(chat_id)
 
     async def _send_event(self, connection: Any, event: str, **fields: Any) -> None:
         """Send a control event (attached, error, ...) to a single connection."""

tests/channels/test_websocket_reconnect_idle.py

@@ -1,6 +1,6 @@
-"""Test websocket reconnect pushes idle status when no turn is active."""
+"""Test websocket subscribe hydration only replays known active turns."""
 
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import MagicMock, patch
 
 import pytest
 
@@ -8,8 +8,8 @@ from nanobot.channels.websocket import WebSocketChannel
 
 
 @pytest.mark.asyncio
-async def test_hydrate_after_subscribe_pushes_idle_when_no_turn_active():
-    """Reconnecting client should receive idle status when no turn is running."""
+async def test_hydrate_after_subscribe_is_quiet_when_no_turn_active():
+    """Subscribe hydration must not inject an idle event into normal message order."""
     channel = WebSocketChannel.__new__(WebSocketChannel)
     channel.gateway = MagicMock()
     channel.gateway.session_manager = MagicMock()
@@ -29,8 +29,7 @@ async def test_hydrate_after_subscribe_pushes_idle_when_no_turn_active():
     with patch("nanobot.channels.websocket.websocket_turn_wall_started_at", return_value=None):
         await channel._hydrate_after_subscribe("test-chat")
 
-    # Should have pushed idle status
-    assert any(e[0] == "goal_status" and e[2] == "idle" for e in sent_events)
+    assert sent_events == []
 
 
 @pytest.mark.asyncio
@@ -55,7 +54,6 @@ async def test_hydrate_after_subscribe_pushes_running_when_turn_active():
     with patch("nanobot.channels.websocket.websocket_turn_wall_started_at", return_value=1234567890.0):
         await channel._hydrate_after_subscribe("test-chat")
 
-    # Should have pushed running status with started_at
     running_events = [e for e in sent_events if e[0] == "goal_status" and e[2] == "running"]
     assert len(running_events) == 1
     assert running_events[0][3]["started_at"] == 1234567890.0

webui/src/lib/nanobot-client.ts

@@ -425,6 +425,13 @@ export class NanobotClient {
     for (const handler of this.statusHandlers) handler(status);
   }
 
+  private clearRunStatusesForReconnect(): void {
+    if (this.runStartedAtByChatId.size === 0) return;
+    const chatIds = [...this.runStartedAtByChatId.keys()];
+    this.runStartedAtByChatId.clear();
+    for (const chatId of chatIds) this.emitRunStatus(chatId, null);
+  }
+
   private handleOpen(): void {
     this.setStatus("open");
     this.reconnectAttempts = 0;
@@ -629,6 +636,7 @@ export class NanobotClient {
   }
 
   private scheduleReconnect(): void {
+    this.clearRunStatusesForReconnect();
     this.setStatus("reconnecting");
     const attempt = this.reconnectAttempts++;
     // Exponential backoff: 0.5s, 1s, 2s, 4s, capped.

webui/src/tests/nanobot-client.test.ts

@@ -188,6 +188,32 @@ describe("NanobotClient", () => {
     expect(client.getRunStartedAt("chat-strip")).toBeNull();
   });
 
+  it("clears stale run strip when reconnecting after a dropped socket", async () => {
+    const client = new NanobotClient({
+      url: "ws://test",
+      reconnect: true,
+      maxBackoffMs: 10,
+      socketFactory: (url) => new FakeSocket(url) as unknown as WebSocket,
+    });
+    const handler = vi.fn();
+    client.onRunStatus(handler);
+    client.connect();
+    lastSocket().fakeOpen();
+    lastSocket().fakeMessage({
+      event: "goal_status",
+      chat_id: "chat-strip",
+      status: "running",
+      started_at: 12_345,
+    });
+
+    lastSocket().close();
+
+    expect(client.getRunStartedAt("chat-strip")).toBeNull();
+    expect(handler).toHaveBeenLastCalledWith("chat-strip", null);
+    await vi.advanceTimersByTimeAsync(20);
+    expect(FakeSocket.instances.length).toBeGreaterThan(1);
+  });
+
   it("clears run strip when a turn_end arrives without idle", () => {
     const client = new NanobotClient({
       url: "ws://test",