feat(web): implement new placement algorithm for week view

[JeanMeijer]

Description

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Type of Change

• Bug fix
• New feature
• Breaking change
• UI/UX update
• Docs update
• Refactor / Cleanup

Related Areas

• Authentication
• Calendar UI
• Data/API
• Docs

Testing

• Manual testing performed
• Cross-browser testing (if UI changes)
• Mobile responsiveness verified (if UI changes)

Checklist

• I’ve read the CONTRIBUTING guide
• My code works and is understandable and follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in complex areas
• I have updated the documentation
• Any dependent changes are merged and published

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Summary by cubic

Implemented a new week-view event placement algorithm for clearer, more predictable layouts. Also refactored event collection hooks and positioning utilities to simplify month/week/day views and reduce duplication.

• New Features

  • Grouped timed events by start-time proximity (40px) and calculated overlap depth to determine width, left offset, and z-index.
  • Added useWeekEventCollection, useMonthEventCollection, and useWeekRowEvents for consistent data across views.
  • Improved all-day/multi-day handling with getAllDayEventCollectionsForDays and per-day clamping.
  • Month week rows now exclude weekend-only events when weekends are hidden.

• Refactors

  • Extracted positioning logic to utils/positioning.ts (eventOverlapsDay, getEventCollectionsForDay, calculateWeekViewEventPositions, PositionedEvent).
  • Simplified filterPastEvents and renamed getEventsStartingOnPlainDate to eventsStartingOn.
  • Replaced generic useEventCollection with specific hooks in day/week/month views.
  • Updated isWithinInterval to use precise Temporal comparisons; added toPlainDate overloads.
  • Minor cleanup: removed console logs, added "use client" to button/copy components.

^{Written for commit f170f6d. Summary will update on new commits.}

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Project	Deployment	Review	Updated (UTC)
analog	Ready	Preview, Comment	Jan 6, 2026 9:12pm

[cubic-dev-ai]

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