feat(TRUEREF-0023): add sqlite-vec search pipeline

src/lib/components/IndexingProgress.svelte

@@ -7,39 +7,33 @@
 
 	$effect(() => {
 		job = null;
-		let stopped = false;
-		let completeFired = false;
+		const es = new EventSource(`/api/v1/jobs/${jobId}/stream`);
 
-		async function poll() {
-			if (stopped) return;
-			try {
-				const res = await fetch(`/api/v1/jobs/${jobId}`);
-				if (res.ok) {
-					const data = await res.json();
-					job = data.job;
-					if (!completeFired && (job?.status === 'done' || job?.status === 'failed')) {
-						completeFired = true;
-						oncomplete?.();
-					}
-				}
-			} catch {
-				// ignore transient errors
-			}
-		}
+		es.addEventListener('job-progress', (event) => {
+			const data = JSON.parse(event.data);
+			job = { ...job, ...data } as IndexingJob;
+		});
 
-		void poll();
-		const interval = setInterval(() => {
-			if (job?.status === 'done' || job?.status === 'failed') {
-				clearInterval(interval);
-				return;
-			}
-			void poll();
-		}, 2000);
+		es.addEventListener('job-done', () => {
+			void fetch(`/api/v1/jobs/${jobId}`)
+				.then(r => r.json())
+				.then(d => { job = d.job; oncomplete?.(); });
+			es.close();
+		});
 
-		return () => {
-			stopped = true;
-			clearInterval(interval);
+		es.addEventListener('job-failed', (event) => {
+			const data = JSON.parse(event.data);
+			if (job) job = { ...job, status: 'failed', error: data.error ?? 'Unknown error' } as IndexingJob;
+			oncomplete?.();
+			es.close();
+		});
+
+		es.onerror = () => {
+			es.close();
+			void fetch(`/api/v1/jobs/${jobId}`).then(r => r.json()).then(d => { job = d.job; });
 		};
+
+		return () => es.close();
 	});
 
 	const progress = $derived(job?.progress ?? 0);