feat: add description facets to profile model and update profile fetching logic

lib/main.dart

···
   }
 
   void handleSignIn() async {
-    final container = ProviderScope.containerOf(context, listen: false);
-
     setState(() {
       isSignedIn = true;
     });
···
   void handleSignOut(BuildContext context) async {
     final container = ProviderScope.containerOf(context, listen: false);
     await auth.clearSession(); // Clear session data
-    // Invalidate Riverpod providers for profile and gallery state
+    // Invalidate Riverpod providers for profile state
     container.invalidate(profileNotifierProvider);
     // Add any other providers you want to invalidate here
     setState(() {

lib/models/profile.dart

···
     int? followsCount,
     int? galleryCount,
     ProfileViewer? viewer,
+    // Added field for description facets used on profile page
+    List<Map<String, dynamic>>? descriptionFacets,
   }) = _Profile;
 
   factory Profile.fromJson(Map<String, dynamic> json) => _$ProfileFromJson(json);

lib/models/profile.freezed.dart

···
   int? get followersCount => throw _privateConstructorUsedError;
   int? get followsCount => throw _privateConstructorUsedError;
   int? get galleryCount => throw _privateConstructorUsedError;
-  ProfileViewer? get viewer => throw _privateConstructorUsedError;
+  ProfileViewer? get viewer =>
+      throw _privateConstructorUsedError; // Added field for description facets used on profile page
+  List<Map<String, dynamic>>? get descriptionFacets =>
+      throw _privateConstructorUsedError;
 
   /// Serializes this Profile to a JSON map.
   Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
···
     int? followsCount,
     int? galleryCount,
     ProfileViewer? viewer,
+    List<Map<String, dynamic>>? descriptionFacets,
   });
 
   $ProfileViewerCopyWith<$Res>? get viewer;
···
     Object? followsCount = freezed,
     Object? galleryCount = freezed,
     Object? viewer = freezed,
+    Object? descriptionFacets = freezed,
   }) {
     return _then(
       _value.copyWith(
···
                 ? _value.viewer
                 : viewer // ignore: cast_nullable_to_non_nullable
                       as ProfileViewer?,
+            descriptionFacets: freezed == descriptionFacets
+                ? _value.descriptionFacets
+                : descriptionFacets // ignore: cast_nullable_to_non_nullable
+                      as List<Map<String, dynamic>>?,
           )
           as $Val,
     );
···
     int? followsCount,
     int? galleryCount,
     ProfileViewer? viewer,
+    List<Map<String, dynamic>>? descriptionFacets,
   });
 
   @override
···
     Object? followsCount = freezed,
     Object? galleryCount = freezed,
     Object? viewer = freezed,
+    Object? descriptionFacets = freezed,
   }) {
     return _then(
       _$ProfileImpl(
···
             ? _value.viewer
             : viewer // ignore: cast_nullable_to_non_nullable
                   as ProfileViewer?,
+        descriptionFacets: freezed == descriptionFacets
+            ? _value._descriptionFacets
+            : descriptionFacets // ignore: cast_nullable_to_non_nullable
+                  as List<Map<String, dynamic>>?,
       ),
     );
   }
···
     this.followsCount,
     this.galleryCount,
     this.viewer,
-  });
+    final List<Map<String, dynamic>>? descriptionFacets,
+  }) : _descriptionFacets = descriptionFacets;
 
   factory _$ProfileImpl.fromJson(Map<String, dynamic> json) =>
       _$$ProfileImplFromJson(json);
···
   final int? galleryCount;
   @override
   final ProfileViewer? viewer;
+  // Added field for description facets used on profile page
+  final List<Map<String, dynamic>>? _descriptionFacets;
+  // Added field for description facets used on profile page
+  @override
+  List<Map<String, dynamic>>? get descriptionFacets {
+    final value = _descriptionFacets;
+    if (value == null) return null;
+    if (_descriptionFacets is EqualUnmodifiableListView)
+      return _descriptionFacets;
+    // ignore: implicit_dynamic_type
+    return EqualUnmodifiableListView(value);
+  }
 
   @override
   String toString() {
-    return 'Profile(cid: $cid, did: $did, handle: $handle, displayName: $displayName, description: $description, avatar: $avatar, followersCount: $followersCount, followsCount: $followsCount, galleryCount: $galleryCount, viewer: $viewer)';
+    return 'Profile(cid: $cid, did: $did, handle: $handle, displayName: $displayName, description: $description, avatar: $avatar, followersCount: $followersCount, followsCount: $followsCount, galleryCount: $galleryCount, viewer: $viewer, descriptionFacets: $descriptionFacets)';
   }
 
   @override
···
                 other.followsCount == followsCount) &&
             (identical(other.galleryCount, galleryCount) ||
                 other.galleryCount == galleryCount) &&
-            (identical(other.viewer, viewer) || other.viewer == viewer));
+            (identical(other.viewer, viewer) || other.viewer == viewer) &&
+            const DeepCollectionEquality().equals(
+              other._descriptionFacets,
+              _descriptionFacets,
+            ));
   }
 
   @JsonKey(includeFromJson: false, includeToJson: false)
···
     followsCount,
     galleryCount,
     viewer,
+    const DeepCollectionEquality().hash(_descriptionFacets),
   );
 
   /// Create a copy of Profile
···
     final int? followsCount,
     final int? galleryCount,
     final ProfileViewer? viewer,
+    final List<Map<String, dynamic>>? descriptionFacets,
   }) = _$ProfileImpl;
 
   factory _Profile.fromJson(Map<String, dynamic> json) = _$ProfileImpl.fromJson;
···
   @override
   int? get galleryCount;
   @override
-  ProfileViewer? get viewer;
+  ProfileViewer? get viewer; // Added field for description facets used on profile page
+  @override
+  List<Map<String, dynamic>>? get descriptionFacets;
 
   /// Create a copy of Profile
   /// with the given fields replaced by the non-null parameter values.

lib/models/profile.g.dart

···
       viewer: json['viewer'] == null
           ? null
           : ProfileViewer.fromJson(json['viewer'] as Map<String, dynamic>),
+      descriptionFacets: (json['descriptionFacets'] as List<dynamic>?)
+          ?.map((e) => e as Map<String, dynamic>)
+          .toList(),
     );
 
 Map<String, dynamic> _$$ProfileImplToJson(_$ProfileImpl instance) =>
···
       'followsCount': instance.followsCount,
       'galleryCount': instance.galleryCount,
       'viewer': instance.viewer,
+      'descriptionFacets': instance.descriptionFacets,
     };

lib/providers/profile_provider.dart

···
 import 'dart:io';
 
+import 'package:bluesky_text/bluesky_text.dart';
 import 'package:grain/api.dart';
 import 'package:grain/models/profile.dart';
 import 'package:grain/models/profile_with_galleries.dart';
···
     return _fetchProfile(did);
   }
 
+  // @TODO: Facets don't always render correctly.
+  List<Map<String, dynamic>>? _filterValidFacets(
+    List<Map<String, dynamic>>? computedFacets,
+    String desc,
+  ) {
+    if (computedFacets == null) return null;
+    return computedFacets.where((facet) {
+      final index = facet['index'];
+      if (index is Map) {
+        final start = index['byteStart'] ?? 0;
+        final end = index['byteEnd'] ?? 0;
+        return start is int && end is int && start >= 0 && end > start && end <= desc.length;
+      }
+      final start = facet['index'] ?? facet['offset'] ?? 0;
+      final end = facet['end'];
+      final length = facet['length'];
+      if (end is int && start is int) {
+        return start >= 0 && end > start && end <= desc.length;
+      } else if (length is int && start is int) {
+        return start >= 0 && length > 0 && start + length <= desc.length;
+      }
+      return false;
+    }).toList();
+  }
+
   Future<ProfileWithGalleries?> _fetchProfile(String did) async {
     final profile = await apiService.fetchProfile(did: did);
     final galleries = await apiService.fetchActorGalleries(did: did);
     if (profile != null) {
-      return ProfileWithGalleries(profile: profile, galleries: galleries);
+      List<Map<String, dynamic>>? facets;
+      final desc = profile.description ?? '';
+      if (desc.isNotEmpty) {
+        try {
+          final blueskyText = BlueskyText(desc);
+          final entities = blueskyText.entities;
+          final computedFacets = await entities.toFacets();
+          facets = _filterValidFacets(computedFacets, desc);
+        } catch (_) {
+          facets = null;
+        }
+      }
+      return ProfileWithGalleries(
+        profile: profile.copyWith(descriptionFacets: facets),
+        galleries: galleries,
+      );
     }
     return null;
   }

lib/providers/profile_provider.g.dart

···
 // RiverpodGenerator
 // **************************************************************************
 
-String _$profileNotifierHash() => r'0a4d40043196309ae74bdb3b88d7d63d25b8b4f6';
+String _$profileNotifierHash() => r'a955b4d4a22d864fc88f77dad30b5d3019ba8dfe';
 
 /// Copied from Dart SDK
 class _SystemHash {

lib/screens/home_page.dart

···
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:grain/api.dart';
···
             ? FloatingActionButton(
                 shape: const CircleBorder(),
                 onPressed: () {
+                  HapticFeedback.mediumImpact();
                   showModalBottomSheet(
                     context: context,
                     isScrollControlled: true,

lib/screens/profile_page.dart

···
-import 'package:bluesky_text/bluesky_text.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:grain/api.dart';
···
         }
         final profile = profileWithGalleries.profile;
         final galleries = profileWithGalleries.galleries;
-        Future<List<Map<String, dynamic>>?> getDescriptionFacets() async {
-          final desc = profile.description ?? '';
-          if (desc.isEmpty) return null;
-          try {
-            final blueskyText = BlueskyText(desc);
-            final entities = blueskyText.entities;
-            return await entities.toFacets();
-          } catch (_) {
-            return null;
-          }
-        }
 
         return Scaffold(
           backgroundColor: theme.scaffoldBackgroundColor,
···
                                   ),
                                   if ((profile.description ?? '').isNotEmpty) ...[
                                     const SizedBox(height: 16),
-                                    FutureBuilder<List<Map<String, dynamic>>?>(
-                                      future: getDescriptionFacets(),
-                                      builder: (context, snapshot) {
-                                        return FacetedText(
-                                          text: profile.description ?? '',
-                                          facets: snapshot.data,
-                                          onMentionTap: (didOrHandle) {
-                                            Navigator.of(context).push(
-                                              MaterialPageRoute(
-                                                builder: (context) =>
-                                                    ProfilePage(did: didOrHandle, showAppBar: true),
-                                              ),
-                                            );
-                                          },
-                                          onLinkTap: (url) {
-                                            // TODO: Implement WebViewPage navigation
-                                          },
-                                          onTagTap: (tag) => Navigator.push(
-                                            context,
-                                            MaterialPageRoute(
-                                              builder: (_) => HashtagPage(hashtag: tag),
-                                            ),
-                                          ),
-                                          linkStyle: TextStyle(
-                                            color: Theme.of(context).colorScheme.primary,
-                                            fontWeight: FontWeight.w600,
+                                    FacetedText(
+                                      text: profile.description ?? '',
+                                      facets: profile.descriptionFacets,
+                                      onMentionTap: (didOrHandle) {
+                                        Navigator.of(context).push(
+                                          MaterialPageRoute(
+                                            builder: (context) =>
+                                                ProfilePage(did: didOrHandle, showAppBar: true),
                                           ),
                                         );
                                       },
+                                      onLinkTap: (url) {
+                                        // TODO: Implement WebViewPage navigation
+                                      },
+                                      onTagTap: (tag) => Navigator.push(
+                                        context,
+                                        MaterialPageRoute(
+                                          builder: (_) => HashtagPage(hashtag: tag),
+                                        ),
+                                      ),
+                                      linkStyle: TextStyle(
+                                        color: Theme.of(context).colorScheme.primary,
+                                        fontWeight: FontWeight.w600,
+                                      ),
                                     ),
                                   ],
                                   const SizedBox(height: 24),