fix: fixed events on chart, chart modal, added datepicker to events

[bigMackD]

Dashboard: event creation time, chart overlays, and close behavior fixes

Summary

This PR improves event creation and dashboard usability:

• Users can backfill events with a chosen date & time.
• Chart overlays now have distinct legend entries/colors per event type with correct timestamps.
• Add Event modal and Event Details drawer reliably close.
• History and chart refresh after creating an event.

Changes

• Add Event modal
  • Added Date & Time (datetime-local) to Food/Insulin/Exercise/Note forms (default: now, required).
  • On submit, converts the selected local time to ISO UTC and sends as eventTime.
  • Reset logic reinitializes eventTime on tab change/close.
• Chart (CGM)
  • Grouped overlays into separate scatter datasets per event type (Food/Insulin/Exercise/Note).
  • Legend entries and colors aligned with History list.
  • Tooltip interaction switched to nearest (x-axis) and title now prefers hovered event’s timestamp (fixes incorrect event time on hover).
  • Click/selection and highlight work across multiple overlay datasets.
• Close behaviors
  • Conditionally render Add Event modal only when open (prevents hidden selects intercepting clicks).
  • Fixed parent binding to (closeModal) for Add Event modal.
  • Fixed details drawer binding to (closeDrawer) so the close icon/backdrop actually dismiss the panel.
• Data refresh
  • After event creation: refresh chart data and TIR.
  • History re-fetch triggered by nudging the filters signal (keeps current filters).

Why

• Backfilling events is a core need; previously all events used “now”.
• Hidden modal components interfered with chart interactions.
• Event overlay tooltips showed incorrect timestamps due to index-based hover.
• Consistent legend/colors improve readability and parity with History.

How to test

1. Open Dashboard and create events of each type.
   • Choose a past Date & Time; submit; verify the event’s time in History and in the details drawer.
2. Hover over event markers on the chart.
   • Tooltip shows the event’s actual time; legend shows a separate entry per type with correct color.
3. Click event markers to open details; close via icon or backdrop.
4. After creating an event, verify chart and TIR refresh, and History updates without losing filters.

[github-actions]

❌ PR Status Report

Code Quality

• ✅ Backend Lint: success
• ❌ Frontend Lint: failure

Unit Tests

• ✅ Backend Tests (.NET): success
• ✅ Frontend Tests (Jest): success

Coverage Reports

📊 Test coverage artifacts have been uploaded and are available in the workflow run.

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Workflow run: 7