Update OpenAPI schema

[dotto-api-schema-updater]

This PR updates the OpenAPI schema from dotto-typespec.

Triggered by: fun-dotto/dotto-typespec@a0afda6

[Copilot]

Pull request overview

This PR syncs the admin app with the latest OpenAPI schema changes from dotto-typespec, updating both the OpenAPI spec and the corresponding UI/data-fetching code paths in the timetable feature.

Changes:

• Removed day-of-week filtering from timetable list retrieval (API query param removed; UI and actions updated accordingly).
• Added support for associating rooms with a timetable item on creation (roomIds required in request; UI updated to allow multi-select).
• Updated timetable “new item” page to fetch and pass rooms to the form.

Reviewed changes

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

Show a summary per file

File	Description
src/components/timetable/TimetableItemForm.tsx	Adds multi-select room checkboxes and submits roomIds with the request.
src/components/timetable/TimetableFilterBar.tsx	Removes day-of-week filter UI and simplifies to semester + search.
src/app/dotto/timetable/page.tsx	Updates initial fetch call to match new fetchTimetableItems signature.
src/app/dotto/timetable/new/page.tsx	Fetches rooms alongside subjects and passes them to the client page.
src/app/dotto/timetable/new/NewTimetableItemPageClient.tsx	Threads rooms through to TimetableItemForm.
src/app/dotto/timetable/actions.ts	Removes dayOfWeek query usage from fetchTimetableItems.
src/app/dotto/timetable/TimetablePageClient.tsx	Removes selected-days state and updates search to call the new fetch signature.
openapi/openapi.yaml	Removes dayOfWeek query param and adds required roomIds to TimetableItemRequest.

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