Improve admin candidate modal UX and add clip menu visibility toggle

- Widen AdminCandidateEditorModal to size lg for better readability
- Rename "Clip-Compilation" section to "Clip / Compilation", update copy to reflect single clips too, drop upload hint and Clip-Plattform field, rename label to "Link"
- Fix NativeSelect dropdown clipping inside overflow-y-auto modals by teleporting the menu to body with fixed positioning, flip-up logic, and dynamic maxHeight capped to viewport
- Add ClipAdminMenuVisible setting (backend domain, contracts, endpoint, migration) with matching frontend types, defaults, form wiring, and toggle in the Clip-Workflow modal — hides the Clips nav item from the admin sidebar when disabled

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/home/HomeLandingModals.vue

@@ -9,6 +9,7 @@ import type {
   HomeSelectedArchive,
   HomeSelectionOption,
 } from './homeModalTypes'
+import type { HomeNominationSubmitContext } from './homeLandingTypes'
 import type { AuthSession } from '../../types/awards'
 
 defineProps<{
@@ -31,13 +32,15 @@ defineProps<{
   pickerTitle: string
   pickerSubtitle: string
   catList: HomeCategoryListItem[]
+  activeCatIndex: number
   activeCatName: string
   noms: HomeNomineeListItem[]
   voteCount: number
   totalCats: number
   canSubmitVote: boolean
+  savedVoteActive: boolean
   submitVote: () => Promise<void> | void
-  submitNomination: () => Promise<void> | void
+  submitNomination: (context: HomeNominationSubmitContext) => Promise<void> | void
   submitting: boolean
   onClipCatChange: (event: Event) => void
   catOptions: HomeSelectionOption[]
@@ -100,11 +103,13 @@ defineProps<{
     :picker-title="pickerTitle"
     :picker-subtitle="pickerSubtitle"
     :cat-list="catList"
+    :active-cat-index="activeCatIndex"
     :active-cat-name="activeCatName"
     :noms="noms"
     :vote-count="voteCount"
     :total-cats="totalCats"
     :can-submit-vote="canSubmitVote"
+    :saved-vote-active="savedVoteActive"
     :submit-vote="submitVote"
     :submit-nomination="submitNomination"
     :submitting="submitting"