feat: add retry/delete for jobs

- db.ts: add resetJob() and deleteJob() statements + exports
- pipeline.ts: export retryJob() — resets job state and re-runs pipeline
- DELETE /api/jobs/[id]: hard-delete terminal jobs (done/failed/cancelled);
  keep cancel-only behavior for active jobs
- POST /api/jobs/[id]/retry: new endpoint; validates failed/cancelled URL job,
  resets and re-runs via retryJob()
- jobs/[id]/+page.svelte: wire Cancel/Retry/Delete buttons with fetch calls;
  fix hardcoded ACCENT → accent store
- jobs/+page.svelte: per-row Retry+Delete icon buttons (visible on hover);
  fix hardcoded ACCENT → accent store

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/routes/jobs/[id]/+page.svelte

@@ -4,8 +4,9 @@
 	import type { Job, Segment } from '$lib/types.js';
 	import SourceIcon from '$lib/components/SourceIcon.svelte';
 	import Waveform from '$lib/components/Waveform.svelte';
+	import { accent } from '$lib/accent.js';
 
-	const ACCENT = '#cdf24e';
+	const ACCENT = $derived($accent.value);
 
 	const jobId = $derived($page.params.id);
 	let job = $state<Job | null>(null);
@@ -108,6 +109,36 @@
 
 	const formats = ['srt', 'txt', 'md', 'json'] as const;
 	const isActive = $derived(!job || !['done', 'failed', 'cancelled'].includes(job.status));
+	const isTerminal = $derived(job !== null && ['done', 'failed', 'cancelled'].includes(job.status));
+	const canRetry = $derived(
+		job !== null &&
+		['failed', 'cancelled'].includes(job.status) &&
+		(job.source?.startsWith('http') ?? false)
+	);
+
+	async function cancelJob() {
+		if (!job) return;
+		await fetch(`/api/jobs/${job.id}`, { method: 'DELETE' });
+		await loadJob();
+	}
+
+	async function deleteJob() {
+		if (!job || !confirm(`Delete job "${job.title || job.id}"?`)) return;
+		const res = await fetch(`/api/jobs/${job.id}`, { method: 'DELETE' });
+		if (res.ok) window.location.href = '/';
+	}
+
+	async function retryJobAction() {
+		if (!job) return;
+		const res = await fetch(`/api/jobs/${job.id}/retry`, { method: 'POST' });
+		if (res.ok) {
+			await loadJob();
+			openStream();
+		} else {
+			const body = await res.json().catch(() => ({}));
+			alert(body.message ?? 'Retry failed');
+		}
+	}
 </script>
 
 <svelte:head>
@@ -143,11 +174,17 @@
 					{#if job.meanVolume != null}· {job.meanVolume.toFixed(1)} dBFS{/if}
 				</div>
 			</div>
+			<div class="job-actions">
 			{#if isActive}
-				<form method="POST" action="/api/jobs/{job.id}?_method=DELETE">
-					<button type="button" class="btn-cancel" aria-label="Cancel job">Cancel</button>
-				</form>
+				<button class="btn-job-action danger" onclick={cancelJob} aria-label="Cancel job">Cancel</button>
 			{/if}
+			{#if canRetry}
+				<button class="btn-job-action accent" onclick={retryJobAction} aria-label="Retry job">↺ Retry</button>
+			{/if}
+			{#if isTerminal}
+				<button class="btn-job-action danger" onclick={deleteJob} aria-label="Delete job">Delete</button>
+			{/if}
+		</div>
 		</div>
 
 		<!-- ── Progress block ────────────────────────────────── -->
@@ -377,20 +414,37 @@
 		text-overflow: ellipsis;
 	}
 
-	.btn-cancel {
+	.job-actions {
+		display: flex;
+		gap: 8px;
+		flex-shrink: 0;
+	}
+
+	.btn-job-action {
 		padding: 8px 14px;
 		border-radius: 8px;
-		border: 1px solid rgba(255, 90, 90, 0.3);
-		background: rgba(255, 90, 90, 0.08);
-		color: #ff8a8a;
 		font-size: 12.5px;
 		font-family: inherit;
 		cursor: pointer;
 		white-space: nowrap;
+		transition: background 0.15s;
 	}
-	.btn-cancel:hover {
+	.btn-job-action.danger {
+		border: 1px solid rgba(255, 90, 90, 0.3);
+		background: rgba(255, 90, 90, 0.08);
+		color: #ff8a8a;
+	}
+	.btn-job-action.danger:hover {
 		background: rgba(255, 90, 90, 0.15);
 	}
+	.btn-job-action.accent {
+		border: 1px solid color-mix(in oklab, var(--accent) 40%, transparent);
+		background: color-mix(in oklab, var(--accent) 10%, transparent);
+		color: var(--accent);
+	}
+	.btn-job-action.accent:hover {
+		background: color-mix(in oklab, var(--accent) 18%, transparent);
+	}
 
 	/* ── Progress card ──────────────────────────────────────── */
 	.progress-card {