refactor: move ocr domain components to lib/ocr/

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

frontend/src/lib/document/transcription/TranscriptionEditView.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
 import { m } from '$lib/paraglide/messages.js';
 import TranscriptionBlock from './TranscriptionBlock.svelte';
-import OcrTrigger from '$lib/components/OcrTrigger.svelte';
+import OcrTrigger from '$lib/ocr/OcrTrigger.svelte';
 import TranscribeCoachEmptyState from '$lib/components/TranscribeCoachEmptyState.svelte';
 import type { PersonMention, TranscriptionBlockData } from '$lib/types';
 import { createBlockAutoSave } from '$lib/document/transcription/useBlockAutoSave.svelte';