feat: add reset-windows entry to the tool palette

Hook the existing tmux window-index reset into the Alt+p tool palette,
special-cased like clone: selecting 'reset-windows' compacts the hqt
session's window indexes (keeping the home window at 0) via
TmuxManager.reset_window_indexes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/test_cli.py

@@ -75,6 +75,41 @@ def test_tool_cmd_clone_dispatches_to_clone(monkeypatch, tmp_path):
     assert calls["clone"] == "hqt-5"
 
 
+def test_tool_cmd_reset_windows_dispatches_to_manager(monkeypatch, tmp_path):
+    monkeypatch.setattr(
+        "hqt.config.get_settings", lambda: Settings(db_path=tmp_path / "t.db")
+    )
+    calls = {}
+
+    async def fake_reset(self, home_window):
+        calls["home"] = home_window
+        return True
+
+    monkeypatch.setattr("hqt.tmux.manager.TmuxManager.reset_window_indexes", fake_reset)
+
+    result = CliRunner().invoke(cli.main, ["tool", "reset-windows", "hqt-5"])
+
+    assert result.exit_code == 0, result.output
+    # Compacts against the configured home/TUI window, not the trigger window.
+    assert calls["home"] == Settings(db_path=tmp_path / "t.db").tui_window_name
+
+
+def test_tool_cmd_reset_windows_failure_reports_error(monkeypatch, tmp_path):
+    monkeypatch.setattr(
+        "hqt.config.get_settings", lambda: Settings(db_path=tmp_path / "t.db")
+    )
+
+    async def fake_reset(self, home_window):
+        return False
+
+    monkeypatch.setattr("hqt.tmux.manager.TmuxManager.reset_window_indexes", fake_reset)
+
+    result = CliRunner().invoke(cli.main, ["tool", "reset-windows", "hqt-5"])
+
+    assert result.exit_code == 1
+    assert "reset window indexes" in result.output
+
+
 def test_tool_cmd_reports_service_error(monkeypatch, tmp_path):
     from hqt.errors import ServiceError
 
@@ -115,6 +150,7 @@ def test_palette_cmd_shows_popup_for_session_window(monkeypatch, tmp_path):
     popup_cmd = argv[-1]
     assert "fzf" in popup_cmd
     assert "nvim" in popup_cmd and "clone" in popup_cmd
+    assert "reset-windows" in popup_cmd
     # the window is baked into the command for `hqt tool {} <window>`
     assert "hqt-5" in popup_cmd