feat: add cameras field to Gallery model and implement CameraPills widget; enhance profile and gallery pages to display cameras

lib/models/gallery.dart

···
     int? commentCount,
     GalleryViewer? viewer,
     List<Map<String, dynamic>>? facets,
+    List<String>? cameras,
   }) = _Gallery;
 
   factory Gallery.fromJson(Map<String, dynamic> json) => _$GalleryFromJson(json);

lib/models/gallery.freezed.dart

···
   int? get commentCount => throw _privateConstructorUsedError;
   GalleryViewer? get viewer => throw _privateConstructorUsedError;
   List<Map<String, dynamic>>? get facets => throw _privateConstructorUsedError;
+  List<String>? get cameras => throw _privateConstructorUsedError;
 
   /// Serializes this Gallery to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
···
     int? commentCount,
     GalleryViewer? viewer,
     List<Map<String, dynamic>>? facets,
+    List<String>? cameras,
   });
 
   $ProfileCopyWith<$Res>? get creator;
···
     Object? commentCount = freezed,
     Object? viewer = freezed,
     Object? facets = freezed,
+    Object? cameras = freezed,
   }) {
     return _then(
       _value.copyWith(
···
                 ? _value.facets
                 : facets // ignore: cast_nullable_to_non_nullable
                       as List<Map<String, dynamic>>?,
+            cameras: freezed == cameras
+                ? _value.cameras
+                : cameras // ignore: cast_nullable_to_non_nullable
+                      as List<String>?,
           )
           as $Val,
     );
···
     int? commentCount,
     GalleryViewer? viewer,
     List<Map<String, dynamic>>? facets,
+    List<String>? cameras,
   });
 
   @override
···
     Object? commentCount = freezed,
     Object? viewer = freezed,
     Object? facets = freezed,
+    Object? cameras = freezed,
   }) {
     return _then(
       _$GalleryImpl(
···
             ? _value._facets
             : facets // ignore: cast_nullable_to_non_nullable
                   as List<Map<String, dynamic>>?,
+        cameras: freezed == cameras
+            ? _value._cameras
+            : cameras // ignore: cast_nullable_to_non_nullable
+                  as List<String>?,
       ),
     );
   }
···
     this.commentCount,
     this.viewer,
     final List<Map<String, dynamic>>? facets,
+    final List<String>? cameras,
   }) : _items = items,
-       _facets = facets;
+       _facets = facets,
+       _cameras = cameras;
 
   factory _$GalleryImpl.fromJson(Map<String, dynamic> json) =>
       _$$GalleryImplFromJson(json);
···
     return EqualUnmodifiableListView(value);
   }
 
+  final List<String>? _cameras;
+  @override
+  List<String>? get cameras {
+    final value = _cameras;
+    if (value == null) return null;
+    if (_cameras is EqualUnmodifiableListView) return _cameras;
+    // ignore: implicit_dynamic_type
+    return EqualUnmodifiableListView(value);
+  }
+
   @override
   String toString() {
-    return 'Gallery(uri: $uri, cid: $cid, title: $title, description: $description, items: $items, creator: $creator, createdAt: $createdAt, favCount: $favCount, commentCount: $commentCount, viewer: $viewer, facets: $facets)';
+    return 'Gallery(uri: $uri, cid: $cid, title: $title, description: $description, items: $items, creator: $creator, createdAt: $createdAt, favCount: $favCount, commentCount: $commentCount, viewer: $viewer, facets: $facets, cameras: $cameras)';
   }
 
   @override
···
             (identical(other.commentCount, commentCount) ||
                 other.commentCount == commentCount) &&
             (identical(other.viewer, viewer) || other.viewer == viewer) &&
-            const DeepCollectionEquality().equals(other._facets, _facets));
+            const DeepCollectionEquality().equals(other._facets, _facets) &&
+            const DeepCollectionEquality().equals(other._cameras, _cameras));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
···
     commentCount,
     viewer,
     const DeepCollectionEquality().hash(_facets),
+    const DeepCollectionEquality().hash(_cameras),
   );
 
   /// Create a copy of Gallery
···
     final int? commentCount,
     final GalleryViewer? viewer,
     final List<Map<String, dynamic>>? facets,
+    final List<String>? cameras,
   }) = _$GalleryImpl;
 
   factory _Gallery.fromJson(Map<String, dynamic> json) = _$GalleryImpl.fromJson;
···
   GalleryViewer? get viewer;
   @override
   List<Map<String, dynamic>>? get facets;
+  @override
+  List<String>? get cameras;
 
   /// Create a copy of Gallery
   /// with the given fields replaced by the non-null parameter values.

lib/models/gallery.g.dart

···
       facets: (json['facets'] as List<dynamic>?)
           ?.map((e) => e as Map<String, dynamic>)
           .toList(),
+      cameras: (json['cameras'] as List<dynamic>?)
+          ?.map((e) => e as String)
+          .toList(),
     );
 
 Map<String, dynamic> _$$GalleryImplToJson(_$GalleryImpl instance) =>
···
       'commentCount': instance.commentCount,
       'viewer': instance.viewer,
       'facets': instance.facets,
+      'cameras': instance.cameras,
     };

lib/screens/gallery_page.dart

···
 import 'package:grain/screens/hashtag_page.dart';
 import 'package:grain/screens/profile_page.dart';
 import 'package:grain/widgets/app_image.dart';
+import 'package:grain/widgets/camera_pills.dart';
 import 'package:grain/widgets/faceted_text.dart';
 import 'package:grain/widgets/gallery_action_buttons.dart';
 import 'package:grain/widgets/gallery_photo_view.dart';
···
                         MaterialPageRoute(builder: (_) => HashtagPage(hashtag: tag)),
                       ),
                     ),
+                  ),
+                if ((gallery.cameras?.isNotEmpty ?? false))
+                  Padding(
+                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
+                    child: CameraPills(cameras: gallery.cameras!),
                   ),
                 if (isLoggedIn)
                   Padding(

lib/screens/profile_page.dart

···
 import 'package:grain/widgets/app_image.dart';
 import 'package:grain/widgets/edit_profile_sheet.dart';
 import 'package:grain/widgets/faceted_text.dart';
+import 'package:grain/widgets/camera_pills.dart';
 import 'package:url_launcher/url_launcher.dart';
 
 import 'gallery_page.dart';
···
                                   ),
                                   if ((profile.cameras?.isNotEmpty ?? false)) ...[
                                     const SizedBox(height: 16),
-                                    Wrap(
-                                      spacing: 8,
-                                      runSpacing: 4,
-                                      children: profile.cameras!
-                                          .map(
-                                            (camera) => Container(
-                                              padding: const EdgeInsets.symmetric(
-                                                horizontal: 12,
-                                                vertical: 4,
-                                              ),
-                                              decoration: BoxDecoration(
-                                                color: theme.colorScheme.surface,
-                                                borderRadius: BorderRadius.circular(999),
-                                              ),
-                                              child: Text(
-                                                '📷 $camera',
-                                                style: TextStyle(
-                                                  color: theme.colorScheme.onSurface,
-                                                  fontWeight: FontWeight.w500,
-                                                  fontSize: 12,
-                                                ),
-                                              ),
-                                            ),
-                                          )
-                                          .toList(),
-                                    ),
+                                    CameraPills(cameras: profile.cameras!),
                                   ],
                                   if ((profile.description ?? '').isNotEmpty) ...[
                                     const SizedBox(height: 16),

lib/widgets/camera_pills.dart

···
+import 'package:flutter/material.dart';
+
+class CameraPills extends StatelessWidget {
+  final List<String> cameras;
+  final EdgeInsetsGeometry? padding;
+  const CameraPills({super.key, required this.cameras, this.padding});
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    if (cameras.isEmpty) return SizedBox.shrink();
+    return Padding(
+      padding: padding ?? EdgeInsets.zero,
+      child: Wrap(
+        spacing: 8,
+        runSpacing: 4,
+        children: cameras
+            .map(
+              (camera) => Container(
+                padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+                decoration: BoxDecoration(
+                  color: theme.colorScheme.surface,
+                  borderRadius: BorderRadius.circular(999),
+                ),
+                child: Text(
+                  '📷 $camera',
+                  style: TextStyle(
+                    color: theme.colorScheme.onSurface,
+                    fontWeight: FontWeight.w500,
+                    fontSize: 12,
+                  ),
+                ),
+              ),
+            )
+            .toList(),
+      ),
+    );
+  }
+}