🐛(cal) fix display of recurring events with exceptions

[sylvinus]

Some events were being shown multiple times (one for each RRULE)

Summary by CodeRabbit

• New Features
  • Recurring calendar invites now collapse into a single series entry per recurring event, eliminating duplicate cards for individual occurrences and providing a cleaner calendar view.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 6a192a83-de21-4fd4-a66d-015aaea7fad9

📥 Commits

Reviewing files that changed from the base of the PR and between 3f200ed and 15adb1c.

📒 Files selected for processing (3)

• src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/calendar-helper.tsx
• src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/index.test.ts
• src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/index.tsx

---

📝 Walkthrough

Walkthrough

This PR adds recurring calendar invite collapsing logic. A new utility groups VEVENTs by UID and selects one series representative per group (preferring master events), then integrates this into the calendar invite component to render one card per recurrence series instead of per occurrence.

Changes

Recurring calendar invite collapsing

Layer / File(s)	Summary
Recurring event collapsing utilities src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/calendar-helper.tsx	pickSeriesRepresentative helper selects between two VEVENTs sharing a UID by preferring the master event (no recurrenceId), else the earlier start time. collapseRecurringEvents groups VEVENTs by uid (or per-index key for UID-less events), selects a representative per group, and returns one VEVENT per recurrence set in first-seen order.
Test coverage for recurring event collapsing src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/index.test.ts	Test suite validates master+override grouping into a single card, UID separation, stable first-seen ordering, UID-less event independence, earliest-occurrence selection when no master exists, and empty-input behavior.
Component integration of event collapsing src/frontend/src/features/layouts/components/thread-view/components/calendar-invite/index.tsx	Calendar invite component imports and applies collapseRecurringEvents to transform parsed events before rendering, switching from one-card-per-occurrence to one-card-per-series representation.

---

🎯 2 (Simple) | ⏱️ ~12 minutes

---

Suggested reviewers

• jbpenrath

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main objective: fixing the display of recurring calendar events with exceptions to prevent duplication.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}