feat(web): implement new lane placement algorithm for all day events

[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

Replaced multi-day lane placement with a greedy min-heap algorithm to pack all-day events more accurately and efficiently. Simplified overflow handling and added a container size hook for responsive layout.

• New Features

  • LanePacker with MinHeap packing (O(n log k)) and stable sorting by start then duration.
  • Inclusive day ranges; adjacent events reuse lanes; reserves one lane for the “+X more” row when needed.
  • useContainerSize hook to measure container width/height via ResizeObserver.

• Refactors

  • multi-day-layout: new placeIntoLanes and cached metadata; organizeEventsWithOverflow now takes an options object and returns { totalLanes, visibleLanes, overflowLanes }.
  • use-multi-day-overflow: uses useContainerSize; removes availableHeight, visibleEvents, hasOverflow, overflowCount; overflowEvents sourced from overflowLanes.
  • Removed getOverflowEvents; added shared MinHeap utility.
  • Minor TODO note in command-bar for color helper reuse.

^{Written for commit 581347a. Summary will update automatically on new commits.}

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Project	Deployment	Review	Updated (UTC)
analog	Ready	Preview, Comment	Dec 28, 2025 4:37pm

[cubic-dev-ai]

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