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/views/home/drawer_menu_page.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+import 'package:Tripz/constant/colors.dart';
+
+class DrawerMenuPage extends StatelessWidget {
+  const DrawerMenuPage({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: 500,
+      color: AppColor.secondaryColor.withOpacity(.5),
+      child: Column(
+        children: [
+          Container(
+            height: 100,
+            color: AppColor.secondaryColor,
+          ),
+          Container(
+            color: Colors.transparent,
+          )
+        ],
+      ),
+    );
+  }
+}