add start date feature

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Project	Deployment	Review	Updated (UTC)
course-schedule-calendar	Ready	Preview, Comment	Dec 15, 2025 0:21am

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Pull request overview

This PR adds a start date feature to the schedule generation system, allowing users to specify when their schedule should begin instead of defaulting to the current date. The implementation includes UI components for date selection, API changes to make start date required, and updates to the calendar generation logic.

• Made startDate a required parameter in both the generateIcal and syncToGoogleCalendar API endpoints
• Updated the iCal generation logic to calculate event occurrences from the user-specified start date rather than the current date
• Added a date picker UI component with session storage persistence for OAuth redirects

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/server/api/routers/schedule.ts	Changed startDate from optional to required in both API endpoints
src/lib/ical.ts	Updated getNextOccurrence to accept a fromDate parameter and renamed local variables to avoid shadowing; fixed same-day event scheduling logic
src/components/upload-zone.tsx	Added start date picker UI, state management, session storage persistence, and validation to disable export buttons when date is missing
src/components/ui/popover.tsx	New popover component for date picker dropdown
src/components/ui/calendar.tsx	New calendar component for date selection
src/components/ui/button.tsx	Added default values for variant/size props and data attributes for styling
pnpm-lock.yaml	Added dependencies for @radix-ui/react-popover and react-day-picker
package.json	Added @radix-ui/react-popover and react-day-picker as dependencies

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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