feat(frontend): add Tiptap renovate group, i18n keys, fix geb. literal, remove rename-conflict

- renovate.json: group all @tiptap/* packages so version bumps stay in sync
- de/en/es.json: add transcription_editor_aria_label and person_born_name_prefix keys
- PersonHoverCard: replace hardcoded "geb." with m.person_born_name_prefix() (Leonie #5602)
- errors.ts: remove PERSON_RENAME_CONFLICT (backend enum value deleted)

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

frontend/src/lib/components/PersonHoverCard.svelte

@@ -109,7 +109,10 @@ const ariaBusy = $derived(state.status === 'loading');
 					<div class="dates" data-testid="person-hover-card-dates">{dateRange}</div>
 				{/if}
 				{#if state.person.alias}
-					<div class="maiden" data-testid="person-hover-card-maiden">geb. {state.person.alias}</div>
+					<div class="maiden" data-testid="person-hover-card-maiden">
+						{m.person_born_name_prefix()}
+						{state.person.alias}
+					</div>
 				{/if}
 			</div>
 			{#if familyChips.length > 0}