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/driver/bubble-master/android/src/main/res/layout/bubble_head_remove_widget.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/remove_relativelayout"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="10dp">
+
+    <ImageView
+        android:id="@+id/remove_img"
+        android:layout_width="60dp"
+        android:layout_height="60dp"
+        android:background="@drawable/white_circle_shape"
+        android:padding="10dp"
+        android:src="@drawable/ic_close_white_24dp" />
+
+</RelativeLayout>

apps/driver/bubble-master/android/src/main/res/layout/layout_bubble_head.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+    <!--   Root container of Floating Widget View  -->
+    <RelativeLayout
+        android:id="@+id/root_container"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content">
+
+        <!--  View while view is collapsed  -->
+
+        <RelativeLayout
+            android:id="@+id/collapse_view"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:visibility="visible">
+
+            <!--   ImageView of floating widget  -->
+            <ImageView
+                android:id="@+id/chat_head_profile_iv"
+                android:layout_width="70dp"
+                android:layout_height="70dp"
+                android:layout_marginTop="8dp"
+                android:src="@drawable/ic_launcher"
+                tools:ignore="ContentDescription" />
+
+            <!--   Close button to close Floating Widget View  -->
+            <ImageView
+                android:id="@+id/close_bubble_head"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="50dp"
+                android:layout_marginTop="5dp"
+                android:padding="1dp"
+                android:background="@drawable/circle_shape"
+                android:src="@drawable/ic_close_white_24dp"
+                tools:ignore="ContentDescription" />
+        </RelativeLayout>
+
+    </RelativeLayout>
+</FrameLayout>