Fix Mantine v9 API breakage in Collapse, Grid and modal types

[mi3lix9]

Summary

Follow-up fixes for #3333 (Bump mantine to v9). Several pages — Settings, System, Wanted, History, Blacklist — render as blank because navbar dropdowns can't expand. The browser console shows:

Received `false` for a non-boolean attribute `expanded`
Matched leaf route at location "/system/" does not have an element or Component.

The TypeScript output lists 8 errors from the same v9 API changes. Runtime tolerates the unknown props as no-ops, but Collapse then defaults to closed and child route links are never rendered.

Changes

Three Mantine v9 API breaks:

1. Collapse prop renamed — v9 uses in (boolean) instead of hidden/expanded. Fixed in 4 call sites:

   • App/Navbar.tsx — the user-facing blocker: dropdowns wouldn't open. Replaced with a conditional render so the empty-children case is handled in JSX rather than a removed hidden prop.
   • App/NotificationDrawer.tsx
   • components/modals/ManualSearchModal.tsx (×2)
   • pages/Settings/components/collapse.tsx

2. ModalSettings no longer re-exported from @mantine/modals root in v9. Switched to a locally-derived Parameters<typeof openModal>[0] alias in modules/modals/hooks.ts and modules/modals/WithModal.tsx — avoids depending on the internal lib/context path.

3. Grid prop renamed — gap → gutter. Fixed in pages/views/ItemOverview.tsx.

Test plan

• yarn tsc / Vite reports Found 0 errors after the fixes (was Found 8 errors)
• Navbar dropdowns (Settings, System, Wanted, History, Blacklist) expand on click and reveal child links
• Navigating to /settings/general, /system/tasks, etc. via the now-visible links renders the actual page content
• ItemOverview (series/movie detail header) renders without prop warnings
• Notification drawer collapsible sections still toggle
• Manual search modal release-info cells still expand/collapse

[anderson-oki]

This PR actually doesnt makes sense, see https://mantine.dev/core/collapse/?t=props it doesnt have in and have expanded.

Also i cant reproduce your issue.

[anderson-oki]

Your dev environment is probably broken because you didnt run npm install and its reverting to mantine v8, see https://v8.mantine.dev/core/collapse/?t=props

[anderson-oki]

Leaving as evidence and reference after reviewing the PR

• Collapse component: In Mantine v9 (e.g., version 9.2.0 used in Bazarr), the Collapse component uses expanded (boolean) to control its open state. The prop in was used in v7/v8 and has been removed/renamed to expanded in v9.

• Grid component: In Mantine v9, the Grid component uses gap to control column spacing. The prop gutter is from v7 and has been removed in v9.

• ModalSettings import: @mantine/modals v9 still exports ModalSettings from @mantine/modals (verified in index.d.ts). Re-defining it manually is unnecessary.

Check https://mantine.dev/core/collapse/?t=props V9 vs https://v8.mantine.dev/core/collapse/?t=props V8