Add optional start times for full-day events

[felixgollnhuber]

Summary

• Add an optional start time to full-day event creation and persist it on events
• Use the stored start time in full-day availability labels and timed ICS exports
• Unify the edit/view segmented controls into a shared UI primitive for consistent sizing and radius
• Keep the new Main branch event location and online meeting fields working alongside the full-day changes

Testing

• Unit tests added and updated for event creation, availability ranking, manage flow, and ICS export
• Local UI verification performed in the browser for the full-day control layout
• pnpm verify passed

[felixgollnhuber]

@codex start review

[Copilot]

Pull request overview

Adds support for an optional “start time” on full-day events, persists it on the Event model, and uses it to improve labeling and calendar exports while also consolidating the edit/view toggle UI into a shared segmented control.

Changes:

• Add fullDayStartMinutes to event creation validation/types, persist it in Prisma, and expose it via public snapshots.
• Use fullDayStartMinutes to enrich full-day availability labels and generate timed ICS output for closed full-day events.
• Introduce a shared SegmentedControl UI primitive and replace duplicated edit/view toggle markup.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/lib/validators.ts	Adds optional fullDayStartMinutes validation to event creation schema.
src/lib/validators.test.ts	Extends validator tests to cover parsing/persisting fullDayStartMinutes.
src/lib/types.ts	Extends event input and snapshot types with fullDayStartMinutes.
src/lib/i18n/messages.ts	Adds copy for full-day start time field and preview label.
src/lib/event-service.ts	Persists fullDayStartMinutes for full-day events and includes it in snapshots.
src/lib/event-service.test.ts	Updates service tests to account for the new DB field and creation behavior.
src/lib/availability.ts	Adds formatting and timed end-time support for full-day suggestions/finalized slot labels.
src/lib/availability.test.ts	Adds coverage for labels/slotEnd when fullDayStartMinutes is present.
src/components/ui/segmented-control.tsx	Introduces shared segmented control component.
src/components/full-day-availability.tsx	Displays “likely start time” and replaces mode toggle with segmented control.
src/components/event-heatmap.tsx	Replaces mode toggle with segmented control for consistent UI.
src/components/create-event-form.tsx	Adds full-day start time selector + preview field and submits it for full-day events.
src/components/create-event-form.test.tsx	Adds test ensuring fullDayStartMinutes is sent for full-day creation.
src/app/api/events/route.test.ts	Updates API tests to include fullDayStartMinutes in POST payload expectations.
src/app/api/events/[slug]/ics/route.ts	Exports timed DTSTART/DTEND for closed full-day events when a start time exists.
src/app/api/events/[slug]/ics/route.test.ts	Adds timed full-day ICS export test coverage.
prisma/schema.prisma	Adds nullable fullDayStartMinutes column to Event.
prisma/migrations/20260427150000_add_full_day_start_time/migration.sql	Migration to add the new DB column.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 114b5b6aa6

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".