FMCS Location+Parent Scoping: Fixed FD-53555 - Adds company-scoped dropdown for parent location in GUI

[snipe]

With FMCS enabled, this clears and filters the location parent option if it's switched.

1. API selectlist — now filters by companyId when FMCS is enabled, so the dropdown only shows same-company locations
2. Blade form — passes $item->company_id to the parent select, so on the edit form it's pre-filtered to the location's company from page load
3. JS — when the user changes the company select, clears the parent location value and updates the jQuery data store so the next search uses the new company filter

Screen.Recording.2026-06-13.at.6.39.11.PM.mov

[codacy-production]

Up to standards ✅

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