- Validate filename ends with .csv (case-insensitive)
- Validate MIME type is text/* or application/csv or text/csv
- Return HTTP 400 with error message if validation fails
- Mark task 2.4 as complete
- Reject uploads larger than 10MB before reading file content
- Reject CSVs with more than 500,000 data rows after parsing
- Checks placed as early as possible in the handler flow
- Mark task 2.3 as done in tasks.md
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- POST /api/upload now creates a chart named from the CSV filename
- Duplicate names get numeric suffix (e.g., btc-daily-2)
- Candles inserted with chart_id instead of replacing all data
- Response includes chart id and name
- Created CandleChart component with lightweight-charts integration
- Implemented SvgOverlay component for line drawing
- Integrated all components in main page
- Fixed TypeScript and Tailwind CSS compatibility issues
- Added comprehensive README.md with project documentation
- Created DEPLOYMENT.md with setup and troubleshooting guide
- Downgraded to stable versions (Tailwind v3, lightweight-charts v4)
- All 59 tasks from OpenSpec completed
- CSV upload with papaparse (handles date strings and Unix timestamps)
- Annotations CRUD (GET, POST, DELETE)
- Candles GET endpoint
- Export annotations as CSV
