fix: resolve code output to chat instead of files (#1797)

## Summary
Comprehensive fix for AI models (Claude 3.7, DeepSeek) that output code to chat instead of creating workspace files. The enhanced parser automatically detects and wraps code blocks in proper artifact tags.

## Key Improvements

### 1. Enhanced Message Parser
- Detects code blocks that should be files even without artifact tags
- Six pattern detection strategies for different code output formats
- Automatic file path extraction and normalization
- Language detection from file extensions

### 2. Pattern Detection
- File creation/modification mentions with code blocks
- Code blocks with filename comments
- File paths followed by code blocks
- "In <filename>" context patterns
- HTML/Component structure detection
- Package.json and config file detection

### 3. Intelligent Processing
- Prevents duplicate processing with block hashing
- Validates file paths before wrapping
- Preserves original content when invalid
- Automatic language detection for syntax highlighting

## Technical Implementation

The solution extends the existing StreamingMessageParser with enhanced detection:
- Falls back to normal parsing when artifacts are properly tagged
- Only applies enhanced detection when no artifacts found
- Maintains backward compatibility with existing models

## Testing
✅ Tested with various code output formats
✅ Handles multiple files in single message
✅ Preserves formatting and indentation
✅ Works with all file types and languages
✅ No performance impact on properly formatted messages

This fix ensures consistent file creation regardless of AI model variations.

🚀 Generated with human expertise

Co-Authored-By: Keoma Wright <founder@lovemedia.org.za>

app/lib/hooks/useMessageParser.ts

@@ -1,12 +1,12 @@
 import type { Message } from 'ai';
 import { useCallback, useState } from 'react';
-import { StreamingMessageParser } from '~/lib/runtime/message-parser';
+import { EnhancedStreamingMessageParser } from '~/lib/runtime/enhanced-message-parser';
 import { workbenchStore } from '~/lib/stores/workbench';
 import { createScopedLogger } from '~/utils/logger';
 
 const logger = createScopedLogger('useMessageParser');
 
-const messageParser = new StreamingMessageParser({
+const messageParser = new EnhancedStreamingMessageParser({
   callbacks: {
     onArtifactOpen: (data) => {
       logger.trace('onArtifactOpen', data);