Add web UI with artifact table and upload functionality

Features:
- Modern web interface with table view of all artifacts
- Display all metadata: filename, type, size, test info, tags
- Upload form with full metadata support
- Query/filter interface
- Detail modal for viewing full artifact information
- Download and delete actions
- Integrated seed data generation via UI
- Responsive design with gradient theme

Technical:
- Pure HTML/CSS/JavaScript (no frameworks)
- FastAPI serves static files
- Seed data API endpoint for easy testing
- Pagination support
- Real-time deployment mode display

The UI is now accessible at http://localhost:8000/

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

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

Dockerfile

@@ -14,8 +14,10 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy application code
 COPY app/ ./app/
+COPY utils/ ./utils/
 COPY alembic/ ./alembic/
 COPY alembic.ini .
+COPY static/ ./static/
 
 # Create non-root user
 RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app