feat(SegmentationColumn): deep-link to transcription panel via ?task=transcribe

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

frontend/src/lib/components/SegmentationColumn.svelte

@@ -36,7 +36,7 @@ let { docs, weeklyCount }: Props = $props();
 			{#each docs as doc (doc.id)}
 				<li>
 					<a
-						href="/documents/{doc.id}"
+						href="/documents/{doc.id}?task=transcribe"
 						class="flex min-h-[44px] flex-col justify-center rounded px-1 py-2 hover:bg-canvas focus-visible:ring-2 focus-visible:ring-focus-ring focus-visible:ring-offset-2 focus-visible:outline-none"
 					>
 						<span class="font-serif text-sm text-ink">{doc.title}</span>