Fe/be/delete apointments

[dashaaaa21]

On the Appointments page in the private dashboard, both teachers and students can delete only their own past appointments (future appointments cannot be deleted), they can select and delete individual old appointments, and when clicking “Select All,” only past appointments are selected and can be deleted.

[Copilot]

Pull request overview

Adds appointment deletion support (limited to past appointments owned by the current user) and extends the appointments UI to support selecting past appointments (including “Select All” past) and deleting individually or in bulk. Also aligns appointment payload fields to consistently use teacherId / studentId and improves schedule time-slot availability by filtering out already-approved bookings.

Changes:

• Backend: add DELETE /api/appointments/:id with ownership + “past only” enforcement.
• Frontend: add per-row and bulk deletion flows in appointments tables with “select past only” behavior.
• Data/model alignment: switch client/server appointment response fields to teacherId / studentId, and update booking/schedule date handling + filtering of booked slots.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
server/src/services/appointment/appointment.service.ts	Adds delete logic + updates appointment response shape to teacherId/studentId.
server/src/routes/appointmentRoute.ts	Registers DELETE /:id route.
server/src/repositories/commandRepositories/appointment.command.ts	Adds DB delete command method.
server/src/controllers/appointment.controller.ts	Adds delete controller returning 204.
client/src/types/appointments.types.ts	Makes teacherId/studentId required on Appointment.
client/src/pages/privetTeachersPages/teacherAppointments/TeacherAppointments.tsx	Adds selection state + single/bulk deletion for teacher appointments.
client/src/pages/privateStudentsPages/clientsAppointments/ClientsAppointments.tsx	Adds selection state + single/bulk deletion for student/teacher view.
client/src/features/appointments/query/useTeacherAppointmentsQuery.ts	Allows optional teacherId override for fetching teacher appointments.
client/src/features/appointments/mutations/useUpdateAppointmentMutation.ts	Improves invalidation + adds success/error notifications.
client/src/features/appointments/mutations/useDeleteAppointmentMutation.ts	New mutation for deleting appointments + cache invalidation + notifications.
client/src/features/appointments/mutations/useCreateAppointmentMutation.ts	Adds teacher-appointments invalidation on successful booking.
client/src/components/teacherSection/teacherSchedule/Time/Time.tsx	Removes default slots; shows “no available slots” message when empty.
client/src/components/teacherSection/teacherSchedule/TeacherSchedule.tsx	Filters available slots by removing times already booked by approved appointments.
client/src/components/table/LessonsTableHeader.tsx	Adds select-all control and bulk delete action in table header.
client/src/components/table/LessonsTable.tsx	Implements selection tracking, select-all (past-only), and selection callbacks.
client/src/components/table/LessonRow.tsx	Disables selection for non-selectable rows and adds per-row delete affordance.
client/src/components/clientsDashboard/MyLessonsSection.tsx	Updates displayed teacher field to teacherId.
client/src/components/bookingConfirmation/BookingConfirmation.tsx	Uses local-date formatting to avoid timezone shift when sending booking date.

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