fix: clear partial Talk startup state (#116067)

ui/src/pages/chat/chat-realtime.test.ts

@@ -458,6 +458,44 @@ describe("chat realtime actions", () => {
     ]);
   });
 
+  it("clears partial realtime state when session startup fails", async () => {
+    let rejectStart: (error: Error) => void = () => undefined;
+    startSpy.mockImplementationOnce(
+      () =>
+        new Promise<undefined>((_resolve, reject) => {
+          rejectStart = reject;
+        }),
+    );
+    const state = createState();
+
+    const starting = state.toggleRealtimeTalk();
+    await vi.waitFor(() => expect(state.realtimeTalkSession).not.toBeNull());
+    const session = inspectSession(state);
+    session.callbacks.onStatus?.("listening");
+    session.callbacks.onVideoCapability?.(true);
+    session.callbacks.onInputLevel?.(0.8);
+    session.callbacks.onTranscript?.({ role: "user", text: "partial", final: false });
+    session.callbacks.onVideoStream?.({} as MediaStream);
+    state.realtimeTalkCameraDevices = [{ deviceId: "camera", label: "Camera" }];
+    state.realtimeTalkVideoPending = true;
+    state.realtimeTalkCameraError = true;
+
+    rejectStart(new Error("startup failed"));
+    await starting;
+
+    expect(state.realtimeTalkSession).toBeNull();
+    expect(state.realtimeTalkActive).toBe(false);
+    expect(state.realtimeTalkStatus).toBe("error");
+    expect(state.realtimeTalkDetail).toBe("startup failed");
+    expect(state.realtimeTalkInputLevel.value).toBe(0);
+    expect(state.realtimeTalkConversation).toEqual([]);
+    expect(state.realtimeTalkVideoStream).toBeNull();
+    expect(state.realtimeTalkCameraDevices).toEqual([]);
+    expect(state.realtimeTalkVideoCapable).toBe(false);
+    expect(state.realtimeTalkVideoPending).toBe(false);
+    expect(state.realtimeTalkCameraError).toBe(false);
+  });
+
   it("ignores a stopped session that rejects after its replacement starts", async () => {
     let rejectFirstStart: (error: Error) => void = () => undefined;
     startSpy.mockImplementationOnce(

ui/src/pages/chat/chat-realtime.ts

@@ -261,17 +261,10 @@ export function attachChatRealtimeActions(state: ChatRealtimeState) {
       if (state.realtimeTalkSession !== session) {
         return;
       }
-      state.realtimeTalkSession = null;
-      session.stop();
-      state.realtimeTalkActive = false;
+      const detail = error instanceof Error ? error.message : String(error);
+      stopChatRealtimeTalk(state);
       state.realtimeTalkStatus = "error";
-      state.realtimeTalkDetail = error instanceof Error ? error.message : String(error);
-      state.realtimeTalkInputLevel.set(0);
-      state.realtimeTalkVideoStream = null;
-      state.realtimeTalkCameraDevices = [];
-      state.realtimeTalkVideoCapable = false;
-      state.realtimeTalkVideoPending = false;
-      state.realtimeTalkCameraError = false;
+      state.realtimeTalkDetail = detail;
       state.requestUpdate();
     }
   };