Adds a one-click upload+parse flow for the TE calendar page HTML.
The TE page (tradingeconomics.com/calendar) contains ~1000 events with
actuals, previous, and analyst consensus (forecast) values.
- Add backend/services/te_html_parser.py:
- parse_html(html): extracts events from <tr data-event> rows
- Maps 14 countries to major currencies (all Eurozone → EUR)
- Impact inferred from data-category (high/medium/low)
- Times converted from Europe/Zurich (CET/CEST) → UTC via zoneinfo
- Actual=td[5], Forecast=td[7] (analyst consensus), Previous=td[6]
- Add POST /api/eco/te-html-upload (saves file to /tmp)
- Add POST /api/eco/te-html-import + GET /status (background parse)
- Add "Import TE HTML" upload button in CalendarPage ImportPanel
Tested locally: 993 events parsed, 854 with forecast, 861 with actual,
date range 2025-03-31 → 2026-06-17, timezone conversion verified.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
