Add bulk timeslot assignment wizard for PTI managers

[Copilot]

Managers need a way to assign all time slots to multiple teachers at once rather than one-by-one. This adds a wizard dialog accessible under PTI > Configuration > Bulk Add Time Slots.

Changes

• wizard/bulk_timeslot_wizard.py — pti.bulk.timeslot.wizard TransientModel:

  • teacher_ids (Many2many res.partner) — teacher selection
  • time_slot_ids (Many2many pti.cycle.time.slot) — all slots pre-selected by default via search([])
  • action_add_timeslots() — fetches all existing combinations in one query, batch-creates only missing records, returns a display_notification toast with count then closes the dialog

• views/bulk_timeslot_wizard_views.xml — dialog form with many2many_tags teacher picker, editable slot list, and Add/Cancel footer buttons; target="new" window action

• security/ir.model.access.csv — PTI Manager full CRUD on wizard model

• views/menu.xml — "Bulk Add Time Slots" menu item under Configuration (Manager only, sequence 30)

Logic: skip existing, batch-create missing

existing = PartnerTimeSlot.search([
    ('partner_id', 'in', teacher_ids),
    ('time_slot_id', 'in', slot_ids),
])
existing_pairs = {(rec.partner_id.id, rec.time_slot_id.id) for rec in existing}

to_create = [
    {'partner_id': t, 'time_slot_id': s, 'status': 'available'}
    for t in teacher_ids
    for s in slot_ids
    if (t, s) not in existing_pairs
]
if to_create:
    PartnerTimeSlot.create(to_create)

Single lookup query + single batch insert regardless of how many teachers/slots are selected.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Create a bulk timeslot add form</issue_title>
<issue_description>
I want to create timeslots for all teachers in just a few steps. The form should

Allow me to select all the teachers I want. At this point just show the employee selection form
Select the timeslots from a list on the form we want to add to these teachers. All should be selected by default.
The action should not modify any existing timeslots - just add the missing ones.
Report its success or failure in a toast message</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Create a bulk timeslot add form #5

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