feat: no console drop when uninstalling backends

1 files changed, 14 insertions, 3 deletions

diff --git a/app/backends/faster.py b/app/backends/faster.py
index 585e480..8c64183 100755
--- a/app/backends/faster.py
+++ b/app/backends/faster.py
@@ -591,21 +591,32 @@ def _detect_remote(managed: bool = False):
     return False, {}
 
 
-def uninstall() -> int:
+def uninstall(*, emit=None, cancel=None) -> int:
     """Remove the faster-qwen3-tts backend entirely.
 
     Uninstalls the pip package (``faster-qwen3-tts``) from the managed venv
     and deletes the cloned checkout (``app/faster-qwen3-tts``, which holds
     examples/openai_server.py and voices.json). A running server this tool
-    started is stopped first (best-effort). Returns the exit code.
+    started is stopped first (best-effort).
+
+    With EMIT given (the in-TUI task view) pip runs piped, streaming into
+    EMIT, so its output never touches the terminal behind curses. CANCEL is
+    a ``threading.Event`` honored between phases only (stop server / pip /
+    delete checkout) — a started phase always completes, so pip is never
+    killed mid-run. Returns the exit code (130 when cancelled before a
+    remaining phase).
     """
     servers.stop("faster")
-    rc = common.pip_uninstall(["faster-qwen3-tts"])
+    if common.cancel_requested(cancel):
+        return 130
+    rc = common.pip_uninstall(["faster-qwen3-tts"], emit=emit)
     if rc != 0:
         print("[WARNING] pip uninstall failed (exit "
               f"{rc}); remove faster-qwen3-tts from the managed venv manually")
     else:
         print("[OK] faster-qwen3-tts removed.")
+    if common.cancel_requested(cancel):
+        return 130
     checkout = _checkout()
     if checkout.is_dir():
         print(f"[INFO] Removing checkout {checkout}...")