feat: Gemini AI (doc OCR + face match) + role-assignment endpoints

- GeminiService (integrations/gemini, @Global): extractDocument (OCR fields) + faceMatch; graceful if no GEMINI_API_KEY
- documents: face-match now real via Gemini; POST /admin/documents/:id/ocr extracts fields for CS auto-fill
- roles: PATCH /admin/users/:id/role (admin) + POST /platform/users/role (bootstrap via x-platform-secret)
- config: gemini + platform.secret; .env.example entries

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/rider/lib/services/ride_tracking_native.dart

@@ -0,0 +1,43 @@
+import 'dart:io';
+import 'package:flutter/services.dart';
+
+class RideTrackingNative {
+  static const MethodChannel _channel = MethodChannel('intaleq/ride_tracking');
+
+  static Future<void> updateRideTracking({
+    required String driverName,
+    String driverPhone = '',
+    required String carDetails,
+    required double driverLat,
+    required double driverLng,
+    required double passengerLat,
+    required double passengerLng,
+    required double destLat,
+    required double destLng,
+    required String rideState, // "waiting" أو "inProgress"
+    required int estimatedTimeMinutes,
+    required double totalDistanceMeters,
+  }) async {
+    if (!Platform.isAndroid) return;
+
+    await _channel.invokeMethod('updateRideTracking', {
+      'driverName': driverName,
+      'driverPhone': driverPhone,
+      'carDetails': carDetails,
+      'driverLat': driverLat,
+      'driverLng': driverLng,
+      'passengerLat': passengerLat,
+      'passengerLng': passengerLng,
+      'destLat': destLat,
+      'destLng': destLng,
+      'rideState': rideState,
+      'estimatedTime': estimatedTimeMinutes,
+      'totalDistance': totalDistanceMeters,
+    });
+  }
+
+  static Future<void> stopRideTracking() async {
+    if (!Platform.isAndroid) return;
+    await _channel.invokeMethod('stopRideTracking');
+  }
+}