feat(code): quit shortcut on completed update modal (#4312)

Add a `q` shortcut to quit the app from the update-complete modal.

---

The "Updating Deep Agents Code" modal tells users to "Quit and relaunch"
once the self-update finishes, but only offered Esc (close modal). This
adds a `q` shortcut that exits the app, active only after the update
command completes, and surfaces it in the modal help line when done.

Made by [Open
SWE](https://openswe.vercel.app/agents/f676294d-7c1a-943c-ad84-bf77cb7ed926)

---------

Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>

libs/code/deepagents_code/widgets/update_progress.py

@@ -27,6 +27,7 @@ class UpdateProgressScreen(ModalScreen[None]):
     BINDINGS: ClassVar[list[BindingType]] = [
         Binding("d", "toggle_details", "Details", show=False),
         Binding("c", "copy_log_path", "Copy log path", show=False),
+        Binding("q", "quit_app", "Quit", show=False),
         Binding("escape", "cancel", "Close", show=False),
     ]
 
@@ -255,6 +256,11 @@ class UpdateProgressScreen(ModalScreen[None]):
         if self._done:
             self.dismiss(None)
 
+    def action_quit_app(self) -> None:
+        """Quit the app once the update command has finished."""
+        if self._done:
+            self.app.exit()
+
     def action_copy_log_path(self) -> None:
         """Copy warning action text or the persisted log path."""
         copy_text = self._copy_text
@@ -311,6 +317,8 @@ class UpdateProgressScreen(ModalScreen[None]):
             parts.insert(1, f"c copy {self._copy_label}")
         elif self._details_visible:
             parts.insert(1, "c copy log path")
+        if self._done:
+            parts.append("q quit")
         return f" {glyphs.bullet} ".join(parts)
 
     def _update_spinner(self) -> None:

libs/code/tests/unit_tests/test_update_progress.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+
 import pytest
 from textual.app import App
 from textual.widgets import Log, Static
@@ -9,6 +11,9 @@ from textual.widgets import Log, Static
 from deepagents_code.config import get_glyphs
 from deepagents_code.widgets.update_progress import UpdateProgressScreen
 
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 
 async def test_update_progress_screen_shows_tail_when_details_toggle(tmp_path) -> None:
     """The progress modal keeps a bounded tail hidden until details are toggled."""
@@ -221,3 +226,50 @@ async def test_update_progress_screen_warning_without_copy_text_copies_log_path(
         await pilot.pause()
 
         assert copied == [str(log_path)]
+
+
+@pytest.mark.parametrize(
+    "complete",
+    [
+        pytest.param(lambda screen: screen.mark_success(), id="success"),
+        pytest.param(
+            lambda screen: screen.mark_failure("uv tool upgrade deepagents-code"),
+            id="failure",
+        ),
+        pytest.param(lambda screen: screen.mark_warning("Heads up"), id="warning"),
+    ],
+)
+async def test_update_progress_screen_quit_waits_until_done(
+    complete: Callable[[UpdateProgressScreen], None],
+    tmp_path,
+) -> None:
+    """Q is ignored while updating and quits the app once the modal is done.
+
+    Every terminal state (success, failure, warning) gates quit on the same
+    `_done` flag, so the shortcut must behave identically in each.
+    """
+    screen = UpdateProgressScreen(
+        latest="2.0.0",
+        command="uv tool upgrade deepagents-code",
+        log_path=tmp_path / "update.log",
+    )
+
+    app = App()
+    async with app.run_test() as pilot:
+        app.push_screen(screen)
+        await pilot.pause()
+
+        help_text = screen.query(Static).filter(".up-help").first()
+        assert "q quit" not in str(help_text.render())
+
+        await pilot.press("q")
+        await pilot.pause()
+        assert app.is_running
+
+        complete(screen)
+        await pilot.pause()
+        assert "q quit" in str(help_text.render())
+
+        await pilot.press("q")
+        await pilot.pause()
+        assert not app.is_running