fix: stepping back steps in tui

1 files changed, 16 insertions, 8 deletions

diff --git a/app/backends/__init__.py b/app/backends/__init__.py
index 3dff306..ef713ba 100644
--- a/app/backends/__init__.py
+++ b/app/backends/__init__.py
@@ -16,9 +16,12 @@ importing them. ``backends.envs`` is imported during that bootstrap, so
 importing this package must stay cheap and dependency-free.
 
 Adding a backend: create ``backends/<name>.py`` exposing
-``detect() -> BackendStatus``, ``run_tui() -> int`` and
-``uninstall() -> int``, then append a ``BackendInfo`` in ``_build_registry``
-below. ``audiobook.py`` and the hub pick it up automatically.
+``detect() -> BackendStatus``, ``setup_screen(stdscr) -> int`` (the setup
+wizard run on the hub's own screen) and ``uninstall() -> int``, then append
+a ``BackendInfo`` in ``_build_registry`` below. ``audiobook.py`` and the hub
+pick it up automatically. A backend's standalone CLI keeps its own
+``run_tui()`` entry (its own curses session), which is not part of the
+registry.
 """
 
 import shlex
@@ -131,11 +134,16 @@ def format_launch_hint(servers: List[ServerSpec]) -> str:
 
 @dataclass
 class BackendInfo:
-    """One registry entry: identity, detector, setup wizard, uninstaller."""
+    """One registry entry: identity, detector, setup wizard, uninstaller.
+
+    SETUP_SCREEN runs the setup wizard on an already-open curses screen
+    (the hub's), returning 0 on completion and non-zero when aborted; the
+    hub calls it as one screen of its own ``tui.Wizard`` stack.
+    """
     key: str
     label: str
     detect: Callable[[], BackendStatus]
-    setup_tui: Callable[[], int]
+    setup_screen: Callable[[object], int]
     uninstall: Callable[[], int] = lambda: 0
 
 
@@ -153,21 +161,21 @@ def _build_registry() -> None:
         key="audiocpp",
         label="audio.cpp",
         detect=audiocpp.detect,
-        setup_tui=audiocpp.run_tui,
+        setup_screen=audiocpp.setup_screen,
         uninstall=audiocpp.uninstall,
     ))
     REGISTRY.append(BackendInfo(
         key="qwen",
         label="qwen-tts",
         detect=qwen.detect,
-        setup_tui=qwen.run_tui,
+        setup_screen=qwen.setup_screen,
         uninstall=qwen.uninstall,
     ))
     REGISTRY.append(BackendInfo(
         key="faster",
         label="faster-qwen3-tts",
         detect=faster.detect,
-        setup_tui=faster.run_tui,
+        setup_screen=faster.setup_screen,
         uninstall=faster.uninstall,
     ))
     for info in REGISTRY: