fix: worktree session UI safety and visibility (review)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/hqt/tui/app.py

@@ -287,8 +287,15 @@ class HqtApp(App):
 
         async def _open() -> None:
             # is_git_repo is async; resolve it before pushing so the dialog can
-            # disable the worktree control for non-repo projects.
+            # disable the worktree control for non-repo projects. This worker is
+            # run raw (not via _run_service_worker), so it must never raise: any
+            # failure (e.g. git not on PATH) falls back to False, which simply
+            # disables the worktree checkbox in the dialog.
+            try:
                 is_git_repo = await worktree.is_git_repo(Path(project_path))
+            except Exception as exc:  # noqa: BLE001 - keep the worker from crashing the TUI
+                log.warning("is_git_repo check failed for %s: %s", project_path, exc)
+                is_git_repo = False
             self.push_screen(NewSessionScreen(harness_names, is_git_repo), on_dismiss)
 
         self.run_worker(_open())
@@ -343,11 +350,10 @@ class HqtApp(App):
                 parts.append("uncommitted changes")
             if state and state.unique_commits > 0:
                 parts.append(f"{state.unique_commits} unmerged commit(s)")
-            warning = (
-                " and ".join(parts).capitalize() + " — work will be lost"
-                if parts
-                else None
-            )
+            warning = None
+            if parts:
+                joined = " and ".join(parts)
+                warning = joined[:1].upper() + joined[1:] + " — work will be lost"
 
             def on_dismiss(result: tuple[bool, bool] | None) -> None:
                 if result is None:

src/hqt/tui/widgets/session_list.py

@@ -37,9 +37,14 @@ def format_session_text(
 ) -> str:
     color = _STATUS_COLORS.get(status_text, "#c6d0f5")  # default: Text
     name = nickname
-    # Mark worktree sessions with their branch. The nickname defaults to the
-    # branch at creation, so only append the marker when it adds information.
-    if worktree_branch and nickname != worktree_branch:
+    # Worktree sessions always carry the ⎇ marker so they're visually distinct
+    # from plain sessions. The nickname defaults to the branch at creation, so
+    # when they match we show the glyph once (no duplicated branch); when they
+    # differ we show both so the branch is still visible.
+    if worktree_branch:
+        if nickname == worktree_branch:
+            name = f"⎇ {nickname}"
+        else:
             name = f"{nickname} ⎇ {worktree_branch}"
     label = escape(f"{name} [{harness_name}]")
     return f"[{color}]{symbol}[/] {label} {status_text}"

tests/test_tui.py

@@ -1404,18 +1404,24 @@ async def test_confirm_delete_cancel_returns_none():
 
 
 def test_format_session_text_appends_worktree_branch_marker():
+    """nickname != branch → show both nickname and branch around the ⎇ glyph."""
     from hqt.tui.widgets.session_list import format_session_text
 
     text = format_session_text("mywork", "claude", "idle", "●", "feature-x")
-    assert "⎇ feature-x" in text
+    assert "mywork ⎇ feature-x" in text
 
 
-def test_format_session_text_no_marker_when_nickname_equals_branch():
-    """Avoid duplication: when nickname already equals the branch, no marker."""
+def test_format_session_text_marker_shows_once_when_nickname_equals_branch():
+    """nickname == branch (the common case) → ⎇ still appears, glyph once, no
+    duplicated branch name."""
     from hqt.tui.widgets.session_list import format_session_text
 
     text = format_session_text("feature-x", "claude", "idle", "●", "feature-x")
-    assert "⎇" not in text
+    assert "⎇" in text
+    # Glyph appears exactly once, and the branch is not duplicated.
+    assert text.count("⎇") == 1
+    assert "⎇ feature-x" in text
+    assert "feature-x ⎇" not in text
 
 
 def test_format_session_text_no_marker_for_plain_session():