feat(TRUEREF-0015): implement web UI repository dashboard

- Repository list with state badges, stats, and action buttons
- Add repository modal for GitHub URLs and local paths
- Live indexing progress bar polling every 2s
- Confirm dialog for destructive actions
- Repository detail page with versions and recent jobs
- Settings page placeholder

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

src/lib/components/IndexingProgress.svelte

@@ -0,0 +1,62 @@
+<script lang="ts">
+	import { onMount, onDestroy } from 'svelte';
+	import type { IndexingJob } from '$lib/types';
+
+	let { jobId }: { jobId: string } = $props();
+
+	let job = $state<IndexingJob | null>(null);
+	let interval: ReturnType<typeof setInterval> | undefined;
+
+	async function pollJob() {
+		try {
+			const res = await fetch(`/api/v1/jobs/${jobId}`);
+			if (res.ok) {
+				const data = await res.json();
+				job = data.job;
+				if (job?.status === 'done' || job?.status === 'failed') {
+					if (interval !== undefined) {
+						clearInterval(interval);
+						interval = undefined;
+					}
+				}
+			}
+		} catch {
+			// ignore polling errors
+		}
+	}
+
+	onMount(() => {
+		pollJob();
+		interval = setInterval(pollJob, 2000);
+	});
+
+	onDestroy(() => {
+		if (interval !== undefined) {
+			clearInterval(interval);
+		}
+	});
+
+	const progress = $derived(job?.progress ?? 0);
+	const processedFiles = $derived(job?.processedFiles ?? 0);
+	const totalFiles = $derived(job?.totalFiles ?? 0);
+</script>
+
+{#if job}
+	<div class="mt-2">
+		<div class="flex justify-between text-xs text-gray-500">
+			<span>{processedFiles} / {totalFiles} files</span>
+			<span>{progress}%</span>
+		</div>
+		<div class="mt-1 h-1.5 w-full rounded-full bg-gray-200">
+			<div
+				class="h-1.5 rounded-full bg-blue-600 transition-all duration-300"
+				style="width: {progress}%"
+			></div>
+		</div>
+		{#if job.status === 'done'}
+			<p class="mt-1 text-xs text-green-600">Indexing complete.</p>
+		{:else if job.status === 'failed'}
+			<p class="mt-1 text-xs text-red-600">{job.error ?? 'Indexing failed.'}</p>
+		{/if}
+	</div>
+{/if}