feat(ocr): integrate progress bar and streaming progress into document page

Replace inline translateOcrProgress with the extracted module. Add
OcrProgressBar below the spinner during OCR. Parse page numbers from
ANALYZING_PAGE progress codes and feed them to the bar. On Done, fill
bar to 100% briefly before clearing the overlay.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/routes/documents/[id]/+page.svelte

@@ -8,6 +8,8 @@ import TranscriptionReadView from '$lib/components/TranscriptionReadView.svelte'
 import TranscriptionPanelHeader from '$lib/components/TranscriptionPanelHeader.svelte';
 import type { TranscriptionBlockData } from '$lib/types';
 import { getErrorMessage } from '$lib/errors';
+import { translateOcrProgress } from '$lib/ocr/translateOcrProgress';
+import OcrProgressBar from '$lib/components/OcrProgressBar.svelte';
 
 let { data } = $props();
 
@@ -132,27 +134,9 @@ let ocrRunning = $state(false);
 let ocrProgressMessage = $state('');
 let ocrErrorMessage = $state('');
 let ocrPollTimer = $state<ReturnType<typeof setInterval> | null>(null);
-
-function translateOcrProgress(code: string): string {
-	if (!code) return m.ocr_progress_heading();
-	const [key, param] = code.split(':');
-	switch (key) {
-		case 'PREPARING':
-			return m.ocr_status_preparing();
-		case 'LOADING':
-			return m.ocr_status_loading();
-		case 'ANALYZING':
-			return m.ocr_status_analyzing();
-		case 'CREATING_BLOCKS':
-			return m.ocr_status_creating_blocks({ count: param ?? '0' });
-		case 'DONE':
-			return m.ocr_status_done_blocks({ count: param ?? '0' });
-		case 'ERROR':
-			return m.ocr_status_error();
-		default:
-			return code;
-	}
-}
+let ocrCurrentPage = $state(0);
+let ocrTotalPages = $state(0);
+let ocrSkippedPages = $state(0);
 
 async function triggerOcr(scriptType: string) {
 	ocrRunning = true;
@@ -186,12 +170,23 @@ function pollOcrJob(jobId: string) {
 			const res = await fetch(`/api/ocr/jobs/${jobId}`);
 			if (!res.ok) return;
 			const job = await res.json();
-			ocrProgressMessage = job.progressMessage ?? '';
+			const rawCode = job.progressMessage ?? '';
+			const progress = translateOcrProgress(rawCode);
+			ocrProgressMessage = progress.message;
+			if (progress.currentPage !== undefined) ocrCurrentPage = progress.currentPage;
+			if (progress.totalPages !== undefined) ocrTotalPages = progress.totalPages;
+			if (progress.skippedPages !== undefined) ocrSkippedPages = progress.skippedPages;
 			if (job.status === 'DONE' || job.status === 'FAILED') {
+				ocrCurrentPage = ocrTotalPages;
 				if (ocrPollTimer) clearInterval(ocrPollTimer);
 				ocrPollTimer = null;
-				ocrRunning = false;
-				ocrProgressMessage = '';
+				setTimeout(() => {
+					ocrRunning = false;
+					ocrProgressMessage = '';
+					ocrCurrentPage = 0;
+					ocrTotalPages = 0;
+					ocrSkippedPages = 0;
+				}, 1000);
 				if (job.status === 'FAILED') {
 					ocrErrorMessage = m.ocr_status_error();
 				}
@@ -439,8 +434,13 @@ onMount(() => {
 								{m.ocr_progress_heading()}
 							</p>
 							<p class="mt-2 text-sm text-ink-2">
-								{translateOcrProgress(ocrProgressMessage)}
+								{ocrProgressMessage}
 							</p>
+							<OcrProgressBar
+								currentPage={ocrCurrentPage}
+								totalPages={ocrTotalPages}
+								skippedPages={ocrSkippedPages}
+							/>
 						</div>
 					{:else if panelMode === 'read'}
 						<TranscriptionReadView