Add OWASP compliance mapping and security test case templates, and document version control implementation phases

memory-bank/features/version-control/visual-diff-viewer.md

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+# Visual Diff Viewer Implementation Plan
+
+## Core Requirements
+1. Side-by-side comparison interface
+2. Syntax highlighting for code diffs
+3. Inline comment anchoring
+4. Change navigation controls
+5. Performance budget: 200ms render time
+
+## Technical Integration
+- **Frontend**  
+  Extend `DiffViewer` component (line 62) with:
+  ```typescript
+  interface EnhancedDiffViewer {
+    renderStrategy: 'inline' | 'side-by-side';
+    syntaxHighlighters: Map<string, Highlighter>;
+    commentThreads: CommentThread[];
+  }
+  ```
+  
+- **Backend**  
+  Enhance `ChangeTracker.compute_diff()` (line 156):
+  ```python
+  def compute_enhanced_diff(self, version1, version2):
+      """Return structured diff with syntax metadata"""
+  ```
+
+## Dependency Matrix
+| Component | Affected Lines | Modification Type |
+|-----------|----------------|--------------------|
+| HistoricalChangeMixin | Current impl. line 6 | Extension |
+| CollaborationSystem | line 90 | Event handling |
+| VersionControlUI | line 62 | Props update |
+
+## Phase Plan
+1. **Week 1**: Diff algorithm optimization
+2. **Week 2**: UI component development
+3. **Week 3**: Performance testing
+4. **Week 4**: Security review