feat: add hidden toggle support for managed event types

[Deepak22448]

What does this PR do?

Adds support for admins to control the hidden field at the parent managed event level, with propagation to child events and lock/unlock functionality.

Previously, managed event types didn't have a hidden toggle for parent events. Each child event could be marked as hidden individually, but this couldn't be controlled at the parent level.

Key Changes

• Add hidden toggle to managed event type editor header
• Add lock/unlock indicator for the hidden field
• Propagate parent's hidden value to children when field is locked
• Allow per-child hidden values when field is unlocked
• Fix bug where toggling hidden from listing page deleted all child events
• Add unit tests for hidden field propagation logic
• Add E2E tests for toggle, lock/unlock, and propagation functionality

Demo

Screen.Recording.2026-01-24.at.12.06.26.PM.mov

How to Test

1. Create a managed event type as an admin
2. Toggle the hidden switch on/off and verify it saves
3. Toggle the lock/unlock icon next to the hidden field
4. When locked: verify all children inherit the parent's hidden value
5. When unlocked: verify children can have individual hidden values set via the assignment tab
6. Add new team members and verify they get the correct hidden value based on the lock state

Fixes #25903

[cubic-dev-ai]

2 issues found across 7 files

Prompt for AI agents (all issues)

Check if these issues are valid — if so, understand the root cause of each and fix them.


<file name="apps/web/modules/event-types/components/tabs/assignment/EventTeamAssignmentTab.tsx">

<violation number="1" location="apps/web/modules/event-types/components/tabs/assignment/EventTeamAssignmentTab.tsx:784">
P2: `isHiddenFieldLocked` is derived from `getValues("metadata")`, which doesn’t subscribe to form updates. Lock/unlock changes to metadata won’t trigger a re-render, so the children assignment UI can receive a stale lock state.</violation>
</file>

<file name="apps/web/playwright/managed-event-types.e2e.ts">

<violation number="1" location="apps/web/playwright/managed-event-types.e2e.ts:301">
P2: Propagation test can pass without validating anything when no child events exist; it should assert at least one child switch exists before checking disabled state.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}

[Deepak22448]

@pallava-joshi CI isn’t running because this PR is from an external contributor. It needs the run-ci label from a maintainer to trigger GitHub Actions.