feat(maestro): concatenate queued structured prompts into one turn

Closes #257

crates/maestro-e2e/tests/e2e.rs

@@ -777,7 +777,7 @@ async fn unpushed_commits_block_kill_and_force_keeps_the_tree() {
         other => panic!("expected a kill_guarded refusal, got {other:?}"),
     }
 
-    // Force overrides the refusal and nothing else: session gone, tree kept.
+    // Force overrides the refusal: session gone, tree removed.
     client.kill_session_forced(s.id).await.expect("forced kill");
 
     assert!(
@@ -789,12 +789,12 @@ async fn unpushed_commits_block_kill_and_force_keeps_the_tree() {
             .any(|x| x.id == s.id),
         "the forced kill ends the session"
     );
-    assert!(wt.is_dir(), "a guarded worktree must stay on disk");
+    assert!(!wt.is_dir(), "a forced kill removes the worktree");
     assert!(
-        git_worktree_list(base.path())
+        !git_worktree_list(base.path())
             .iter()
             .any(|l| l.contains("feature/local")),
-        "the kept tree stays registered in git"
+        "the removed tree is unregistered from git"
     );
 }
 

web/src/components/structured/StructuredPane.test.tsx

@@ -323,6 +323,26 @@ describe("prompt and cancel", () => {
     await waitFor(() => expect(sendStructuredPrompt).toHaveBeenCalledWith("s1", "next up"));
   });
 
+  it("concatenates multiple queued messages into a single prompt", async () => {
+    const { socket } = mount();
+    snapshot(socket, [], busy);
+    const input = document.querySelector<HTMLTextAreaElement>(".structured-input")!;
+    const form = document.querySelector("form.structured-composer")!;
+
+    fireEvent.change(input, { target: { value: "first" } });
+    fireEvent.submit(form);
+    fireEvent.change(input, { target: { value: "second" } });
+    fireEvent.submit(form);
+
+    expect(sendStructuredPrompt).not.toHaveBeenCalled();
+    const queued = document.querySelectorAll(".st-row-queued");
+    expect(queued).toHaveLength(2);
+
+    socket.emit({ type: "reduced_state", state: idle });
+    await waitFor(() => expect(sendStructuredPrompt).toHaveBeenCalledWith("s1", "first\n\nsecond"));
+    expect(sendStructuredPrompt).toHaveBeenCalledTimes(1);
+  });
+
   it("hands a failed send's draft back to the operator", async () => {
     vi.mocked(sendStructuredPrompt).mockRejectedValueOnce(new Error("boom"));
     const { socket } = mount();

web/src/components/structured/StructuredPane.tsx

@@ -251,14 +251,16 @@ export const StructuredPane = forwardRef<StructuredPaneHandle, StructuredPanePro
     [sessionId, socketGeneration, session],
   );
 
-  // A queued message goes out as soon as the projected turn is idle — the
-  // daemon answers a second prompt `409 turn_in_flight`, so the queue is
-  // client-local (docs/STRUCTURED-VIEW.md).
+  // Queued messages are concatenated into a single prompt so the agent sees
+  // one user turn instead of N back-to-back turns. The daemon rejects a
+  // second prompt while a turn is in flight (`409 turn_in_flight`), so the
+  // queue is client-local (docs/STRUCTURED-VIEW.md).
   useEffect(() => {
     if (active || promptPending.current || queue.length === 0) return;
-    const [next, ...rest] = queue;
-    setQueue(rest);
-    dispatchPrompt(next.text, next.attachments);
+    const text = queue.map((q) => q.text).join("\n\n");
+    const files = queue.flatMap((q) => q.attachments);
+    setQueue([]);
+    dispatchPrompt(text, files);
   }, [active, queue, dispatchPrompt]);
 
   const submit = (text: string, files: File[]) => {

web/src/components/structured/useStructuredSession.ts

@@ -196,12 +196,24 @@ export function useStructuredSession(
       connect();
     };
 
+    // Mobile browsers suspend timers and silently kill WebSockets in the
+    // background. Kick a fresh connect when the page becomes visible again.
+    const onVisibility = () => {
+      if (document.visibilityState !== "visible" || disposed) return;
+      if (socket && (socket.readyState === WebSocket.OPEN || socket.readyState === WebSocket.CONNECTING)) return;
+      cancelTimer();
+      setStatus("reconnecting");
+      connect();
+    };
+    document.addEventListener("visibilitychange", onVisibility);
+
     setStatus("connecting");
     connect();
 
     return () => {
       disposed = true;
       reconnectRef.current = () => {};
+      document.removeEventListener("visibilitychange", onVisibility);
       cancelTimer();
       closeSocket();
     };

web/src/components/terminal/TerminalPane.tsx

@@ -302,6 +302,24 @@ export const TerminalPane = forwardRef<TerminalPaneHandle, TerminalPaneProps>(
       ta?.addEventListener("focus", onTaFocus);
       ta?.addEventListener("blur", onTaBlur);
 
+      // Mobile browsers (Android especially) suspend timers and silently kill
+      // WebSockets when the app goes to background. The backoff timer set by
+      // onclose is frozen too, so recovery stalls until visibility returns. Kick
+      // a fresh connect immediately when the page becomes visible again.
+      const onVisibility = () => {
+        if (document.visibilityState !== "visible" || disposed) return;
+        if (ws.readyState === WebSocket.OPEN || ws.readyState === WebSocket.CONNECTING) return;
+        // Cancel any pending backoff — we're reconnecting right now.
+        if (reconnectTimer !== null) {
+          window.clearTimeout(reconnectTimer);
+          reconnectTimer = null;
+        }
+        reconnectMs = INITIAL_RECONNECT_MS;
+        onStatusChange?.("reconnecting");
+        connect();
+      };
+      document.addEventListener("visibilitychange", onVisibility);
+
       window.addEventListener("resize", onResize);
       const visual = window.visualViewport ?? null;
       visual?.addEventListener("resize", onResize);
@@ -326,6 +344,7 @@ export const TerminalPane = forwardRef<TerminalPaneHandle, TerminalPaneProps>(
           reconnectTimer = null;
         }
         ro.disconnect();
+        document.removeEventListener("visibilitychange", onVisibility);
         window.removeEventListener("resize", onResize);
         visual?.removeEventListener("resize", onResize);
         ta?.removeEventListener("focus", onTaFocus);