refactor: migrate to flutter_markdown_plus for enhanced markdown support

- Replaced the gpt_markdown package with flutter_markdown_plus to improve markdown rendering capabilities.
- Updated the markdown configuration to utilize the new package, enhancing the overall maintainability and adaptability of markdown features.
- Adjusted the streaming markdown widget to integrate with the new markdown body implementation, ensuring a cohesive user experience.
- Removed deprecated builders and streamlined the code for better clarity and performance.

lib/features/chat/widgets/assistant_message_widget.dart

@@ -768,6 +768,7 @@ class _AssistantMessageWidgetState extends ConsumerState<AssistantMessageWidget>
     Widget buildDefault(BuildContext context) => StreamingMarkdownWidget(
       content: processedContent,
       isStreaming: widget.isStreaming,
+      onTapLink: (url, _) => _launchUri(url),
     );
 
     final responseBuilder = ref.watch(assistantResponseBuilderProvider);

lib/shared/widgets/markdown/streaming_markdown_widget.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:gpt_markdown/gpt_markdown.dart';
+import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 
 import '../../theme/theme_extensions.dart';
 import 'markdown_config.dart';
@@ -26,74 +26,30 @@ class StreamingMarkdownWidget extends StatelessWidget {
     }
 
     final normalized = ConduitMarkdownPreprocessor.normalize(content);
-
+    final markdownTheme = ConduitMarkdownConfig.resolve(context);
-    const featureFlags = MarkdownFeatureFlags(
+    final markdownBody = MarkdownBody(
-      enableSyntaxHighlighting: true,
+      data: normalized,
-      enableMermaid: true,
+      styleSheet: markdownTheme.styleSheet,
+      selectable: false,
+      imageBuilder: markdownTheme.imageBuilder,
+      onTapLink: (text, href, title) {
+        final target = href ?? '';
+        if (target.isEmpty) {
+          return;
+        }
+        final resolvedTitle = title.isNotEmpty ? title : text;
+        onTapLink?.call(target, resolvedTitle);
+      },
     );
 
-    final markdownTheme = ConduitMarkdownConfig.resolve(
+    return SelectionArea(
-      context,
-      flags: featureFlags,
-    );
-    final textScaler = MediaQuery.maybeOf(context)?.textScaler;
-
-    final themedControls = Theme.of(context).copyWith(
-      checkboxTheme: markdownTheme.checkboxTheme,
-      radioTheme: markdownTheme.radioTheme,
-    );
-
-    return GptMarkdownTheme(
-      gptThemeData: markdownTheme.themeData,
       child: Theme(
-        data: themedControls,
+        data: Theme.of(context).copyWith(
-        child: SelectionArea(
+          textSelectionTheme: TextSelectionThemeData(
-          child: GptMarkdown(
+            cursorColor: context.conduitTheme.buttonPrimary,
-            normalized,
-            style: markdownTheme.textStyle,
-            followLinkColor: markdownTheme.followLinkColor,
-            textDirection: Directionality.of(context),
-            textScaler: textScaler,
-            onLinkTap: onTapLink,
-            codeBuilder: markdownTheme.codeBuilder,
-            imageBuilder: markdownTheme.imageBuilder,
-            orderedListBuilder: markdownTheme.orderedListBuilder,
-            unOrderedListBuilder: markdownTheme.unOrderedListBuilder,
-            tableBuilder: markdownTheme.tableBuilder,
-            useDollarSignsForLatex: true,
-            highlightBuilder: (highlightContext, inline, baseStyle) {
-              final softened = ConduitMarkdownPreprocessor.softenInlineCode(
-                inline,
-              );
-              final theme = highlightContext.conduitTheme;
-              final base = baseStyle;
-              final fontSize = (base.fontSize ?? 13).clamp(11, 15).toDouble();
-              return Container(
-                padding: const EdgeInsets.symmetric(
-                  horizontal: Spacing.xs,
-                  vertical: Spacing.xxs,
-                ),
-                decoration: BoxDecoration(
-                  color: theme.surfaceBackground.withValues(alpha: 0.55),
-                  borderRadius: BorderRadius.circular(AppBorderRadius.xs),
-                  border: Border.all(
-                    color: theme.cardBorder.withValues(alpha: 0.2),
-                    width: BorderWidth.micro,
-                  ),
-                ),
-                child: Text(
-                  softened,
-                  style: base.copyWith(
-                    fontFamily: AppTypography.monospaceFontFamily,
-                    fontSize: fontSize,
-                    height: 1.35,
-                    color: theme.code?.color ?? theme.textSecondary,
-                  ),
-                ),
-              );
-            },
           ),
         ),
+        child: markdownBody,
       ),
     );
   }

pubspec.lock

@@ -451,14 +451,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_math_fork:
+  flutter_markdown_plus:
-    dependency: transitive
+    dependency: "direct main"
     description:
-      name: flutter_math_fork
+      name: flutter_markdown_plus
-      sha256: "6d5f2f1aa57ae539ffb0a04bb39d2da67af74601d685a161aff7ce5bda5fa407"
+      sha256: "7f349c075157816da399216a4127096108fd08e1ac931e34e72899281db4113c"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.4"
+    version: "1.0.5"
   flutter_native_splash:
     dependency: "direct dev"
     description:
@@ -539,14 +539,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.1.3"
-  flutter_svg:
-    dependency: transitive
-    description:
-      name: flutter_svg
-      sha256: b9c2ad5872518a27507ab432d1fb97e8813b05f0fc693f9d40fad06d073e0678
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.2.1"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -605,14 +597,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "14.8.1"
-  gpt_markdown:
-    dependency: "direct main"
-    description:
-      name: gpt_markdown
-      sha256: "8174983f2ed7d8576d25810913e3afe3f8ffdaa3172c0c823b7cfc289b67f380"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.4"
   graphs:
     dependency: transitive
     description:
@@ -845,6 +829,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.0"
+  markdown:
+    dependency: transitive
+    description:
+      name: markdown
+      sha256: "935e23e1ff3bc02d390bad4d4be001208ee92cc217cb5b5a6c19bc14aaa318c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.3.0"
   matcher:
     dependency: transitive
     description:
@@ -885,14 +877,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.5.0"
-  nested:
-    dependency: transitive
-    description:
-      name: nested
-      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.0.0"
   node_preamble:
     dependency: transitive
     description:
@@ -941,14 +925,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.1"
-  path_parsing:
-    dependency: transitive
-    description:
-      name: path_parsing
-      sha256: "883402936929eac138ee0a45da5b0f2c80f89913e6dc3bf77eb65b84b409c6ca"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.0"
   path_provider:
     dependency: "direct main"
     description:
@@ -1037,14 +1013,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.3"
-  provider:
-    dependency: transitive
-    description:
-      name: provider
-      sha256: "4e82183fa20e5ca25703ead7e05de9e4cceed1fbd1eadc1ac3cb6f565a09f272"
-      url: "https://pub.dev"
-    source: hosted
-    version: "6.1.5+1"
   pub_semver:
     dependency: transitive
     description:
@@ -1530,14 +1498,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.2"
-  tuple:
-    dependency: transitive
-    description:
-      name: tuple
-      sha256: a97ce2013f240b2f3807bcbaf218765b6f301c3eff91092bcfa23a039e7dd151
-      url: "https://pub.dev"
-    source: hosted
-    version: "2.0.2"
   typed_data:
     dependency: transitive
     description:
@@ -1626,30 +1586,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.5.1"
-  vector_graphics:
-    dependency: transitive
-    description:
-      name: vector_graphics
-      sha256: a4f059dc26fc8295b5921376600a194c4ec7d55e72f2fe4c7d2831e103d461e6
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.19"
-  vector_graphics_codec:
-    dependency: transitive
-    description:
-      name: vector_graphics_codec
-      sha256: "99fd9fbd34d9f9a32efd7b6a6aae14125d8237b10403b422a6a6dfeac2806146"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.13"
-  vector_graphics_compiler:
-    dependency: transitive
-    description:
-      name: vector_graphics_compiler
-      sha256: d354a7ec6931e6047785f4db12a1f61ec3d43b207fc0790f863818543f8ff0dc
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.19"
   vector_math:
     dependency: transitive
     description:

pubspec.yaml

@@ -30,7 +30,7 @@ dependencies:
   shared_preferences: ^2.3.2
   
   # UI Components - GPT Markdown  
-  gpt_markdown: ^1.1.4
+  flutter_markdown_plus: ^1.0.3
   cached_network_image: ^3.3.1
   flutter_highlight: ^0.7.0
   webview_flutter: ^4.7.0