Decide whether the disabled CollabWrapperComponent should be removed

### Task Summary

`CollabWrapperComponent` cannot be instantiated. It is declared in `app.module.ts` and registered as the formly wrapper `"collab-wrapper"` in `formly-config.ts`, but nothing ever applies that wrapper name to a field — the only code that does is `CollabWrapperComponent.setupFieldConfig`, inside the component's own file, and its sole caller in `operator-property-edit-frame.component.ts` is commented out.

It shows in coverage at **6.8% across 73 lines**, currently the largest uncovered frontend file.

The important caveat, and the reason this needs a decision rather than a routine cleanup: the caller was disabled with

> `// TODO: we temporarily disable this due to Yjs update causing issues in Formly.`

That disabling predates the October 2025 `core/gui` relocation, so it has been off for well over a year, and every commit touching the component since has been mechanical upkeep — an Angular 19 upgrade, the standalone-components refactor, and a dependabot `y-quill` bump keeping a dependency current for code that never runs.

So the question for maintainers is whether the intent to restore is still live. If it is, this should stay and the coverage line should simply be accepted or ignored. If it is not, the component is dead weight that Renovate and refactors keep paying for.

Scope if removed: the component plus its template and styles, the `app.module` import and declaration, the `formly-config` import and wrapper registration, and the commented-out caller.

Two things to know before touching it:

- `operator-property-edit-frame.component.spec.ts` imports `COLLAB_DEBOUNCE_TIME_MS` from the component, but only as a `tick()` duration during fixture setup — unrelated to the debounce its assertions actually wait on (`FORM_DEBOUNCE_TIME_MS`). It is an incidental borrow, not a real dependency.
- `quill`, `y-quill` and `quill-cursors` are **not** removable alongside it: `operator-property-edit-frame` and `port-property-edit-frame` both still use them.

### Task Type

- [x] Refactor / Cleanup
- [ ] DevOps / Deployment / CI
- [ ] Testing / QA
- [ ] Documentation
- [ ] Performance
- [ ] Other