🎨 Continued to rearrange core folders content

lib/thoughts/thought_widgets/thought/thought_content.dart

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+import 'package:flutter/material.dart';
+import 'package:island/thoughts/thought.dart';
+import 'package:island/drive/content/markdown.dart';
+import 'package:island/thoughts/thought_widgets/thought/thought_proposal.dart';
+
+class ThoughtContent extends StatelessWidget {
+  const ThoughtContent({
+    super.key,
+    required this.isStreaming,
+    required this.streamingText,
+    this.thought,
+  });
+
+  final bool isStreaming;
+  final String streamingText;
+  final SnThinkingThought? thought;
+
+  bool get _isErrorMessage {
+    if (thought == null) return false;
+    // Check if this is an error thought by ID or content
+    if (thought!.id.startsWith('error-')) return true;
+    final textParts = thought!.parts
+        .where((p) => p.type == ThinkingMessagePartType.text)
+        .map((p) => p.text ?? '')
+        .join('');
+    return textParts.startsWith('Error:');
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final content = streamingText.isNotEmpty
+        ? streamingText
+        : thought != null
+        ? thought!.parts
+              .where((p) => p.type == ThinkingMessagePartType.text)
+              .map((p) => p.text ?? '')
+              .join('')
+        : '';
+
+    if (content.isEmpty) return const SizedBox.shrink();
+
+    final isError = content.startsWith('Error:') || _isErrorMessage;
+
+    return Container(
+      padding: isError ? const EdgeInsets.all(8) : EdgeInsets.zero,
+      decoration: isError
+          ? BoxDecoration(
+              border: Border.all(
+                color: Theme.of(context).colorScheme.error,
+                width: 1,
+              ),
+              borderRadius: BorderRadius.circular(8),
+            )
+          : null,
+      child: MarkdownTextContent(
+        isSelectable: true,
+        content: content,
+        extraBlockSyntaxList: [ProposalBlockSyntax()],
+        textStyle: Theme.of(context).textTheme.bodyMedium!.copyWith(
+          color: isError ? Theme.of(context).colorScheme.error : null,
+        ),
+        extraGenerators: [
+          ProposalGenerator(
+            backgroundColor: Theme.of(context).colorScheme.secondaryContainer,
+            foregroundColor: Theme.of(context).colorScheme.onSecondaryContainer,
+            borderColor: Theme.of(context).colorScheme.outline,
+          ),
+        ],
+      ),
+    );
+  }
+}