test(tui): fix stale mocks + xdist flakes in TUI test suite

All 61 TUI-related tests green across 3 consecutive xdist runs.

tests/tui_gateway/test_protocol.py:
- rename `get_messages` → `get_messages_as_conversation` on mock DB (method
  was renamed in the real backend, test was still stubbing the old name)
- update tool-message shape expectation: `{role, name, context}` matches
  current `_history_to_messages` output, not the legacy `{role, text}`

tests/hermes_cli/test_tui_resume_flow.py:
- `cmd_chat` grew a first-run provider-gate that bailed to "Run: hermes
  setup" before `_launch_tui` was ever reached; 3 tests stubbed
  `_resolve_last_session` + `_launch_tui` but not the gate
- factored a `main_mod` fixture that stubs `_has_any_provider_configured`,
  reused by all three tests

tests/test_tui_gateway_server.py:
- `test_config_set_personality_resets_history_and_returns_info` was flaky
  under xdist because the real `_write_config_key` touches
  `~/.hermes/config.yaml`, racing with any other worker that writes
  config. Stub it in the test.

tests/gateway/test_command_bypass_active_session.py

@@ -200,6 +200,22 @@ class TestCommandBypassActiveSession:
             "/background response was not sent back to the user"
         )
 
+    @pytest.mark.asyncio
+    async def test_queue_bypasses_guard(self):
+        """/queue must bypass so it can queue without interrupting."""
+        adapter = _make_adapter()
+        sk = _session_key()
+        adapter._active_sessions[sk] = asyncio.Event()
+
+        await adapter.handle_message(_make_event("/queue follow up"))
+
+        assert sk not in adapter._pending_messages, (
+            "/queue was queued as a pending message instead of being dispatched"
+        )
+        assert any("handled:queue" in r for r in adapter.sent_responses), (
+            "/queue response was not sent back to the user"
+        )
+
 
 # ---------------------------------------------------------------------------
 # Tests: non-bypass messages still get queued