test: align suite with shipped behavior (WiFi swap, BUG-10 guard, odometer_baseline)

- test_app_trip + test_trip_sql: mock was_car_ever_connected() so trip
  building runs (BUG-10 guard suppresses trips until car ECU reached)
- test_app_settings: include odometer_baseline in valid payload + assert save
- test_yaris_uplink: Hotspot -> Hotspot-local; restore_fallback no longer
  activates AP (reports no_connection); wait timeout writes fallback_restored
- test_app_network: local_hotspot mode removed by WiFi swap -> wifi/no-internet

tests/test_app_trip.py

@@ -1,10 +1,22 @@
 import unittest
 from datetime import datetime, timedelta
+from unittest.mock import patch
 
 from modules import app_trip
 
 
 class TripBuilderTest(unittest.TestCase):
+    def setUp(self):
+        # BUG-10 guard suppresses trips until the car ECU has been reached
+        # once. Trip-building tests simulate a connected car.
+        self._car_connected = patch(
+            "modules.app_obd.was_car_ever_connected", return_value=True
+        )
+        self._car_connected.start()
+
+    def tearDown(self):
+        self._car_connected.stop()
+
     def rows_for_route(self, coordinates, speeds=None, start_id=1):
         started = datetime(2026, 1, 1, 8)
         speeds = speeds or [0] * len(coordinates)