Mark all tasks complete for Feature 003 (markdown rendering)

All 21 tasks completed successfully:
- 65 automated tests passing (100%)
- Manual testing complete (security + performance)
- Feature ready for production

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

specs/003-render-ai-analyis/tasks.md

@@ -1,9 +1,17 @@
 # Tasks: Render AI Analysis as Formatted HTML
 
+**Status**: ✅ **COMPLETED** (2025-10-18)
 **Branch**: `003-render-ai-analyis`
 **Input**: Design documents from `/specs/003-render-ai-analyis/`
 **Prerequisites**: plan.md, spec.md
 
+**Completion Summary**:
+- All 21 tasks completed (T001-T021)
+- 65 automated tests passing (36 unit, 14 contract, 15 integration)
+- Manual security and performance validation complete
+- Zero regressions in existing functionality
+- Feature ready for production
+
 **Organization**: Tasks organized by user story to enable independent implementation and testing.
 
 ## Format: `[ID] [P?] [Story] Description`