Feat/teacher public visibility toggle

[Alaa2019-ml]

In this pull request

• I added a publish toggle for teachers.
• Teachers can only request publish if they added subjects and schedule.
• Requested profiles go to Pending for moderator approval (not public immediately).
• Teachers can now see their account status in profile.

Current flow:

1. Teacher fills profile.
2. Teacher toggles Public profile ON.
3. Backend validates:

• at least 1 subject
• at least 1 schedule slot

1. If invalid -> request fails (400), teacher's account stays private.
2. If valid -> backend sets:

• isPublic = true
• status = "pending"

1. Teacher is not visible on public teachers page yet (only active is public).
2. Moderator opens moderator teachers page.

• Default list excludes draft
• sees review statuses like pending (and others)

1. Moderator changes teacher pending -> active.
2. Teacher becomes visible on public teachers page.
3. If teacher toggles OFF (Private profile) -> backend sets not public and moves back to draft flow (while keeping blocked/rejected protected).

What changed:

• Admin reviews only teacher accounts that already meet requirements and are ready for visibility.
• Draft/incomplete accounts don’t flood the moderator queue.
• Result: fewer accounts to review, faster moderation, and time saved.