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_trip_sql.py

@@ -2,6 +2,7 @@ import os
 import tempfile
 import unittest
 from datetime import datetime, timedelta
+from unittest.mock import patch
 
 from modules import app_sql
 
@@ -15,8 +16,15 @@ class TripSqlTest(unittest.TestCase):
         app_sql._last_trip_refresh = 0
         app_sql.sql_path = self.path
         self.conn = app_sql.get_conn()
+        # refresh_trips() and build_trip_summaries() suppress trips until the
+        # car ECU has been reached once (BUG-10 guard). 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()
         if app_sql._conn is not None:
             app_sql._conn.close()
         app_sql._conn = None