fix(ROUTING-0001): repair repo routing and isolate MCP filtering

src/lib/components/RepositoryCard.svelte

@@ -26,6 +26,10 @@
 		error: 'Error'
 	};
 
+	const detailsHref = $derived(
+		resolveRoute('/repos/[id]', { id: encodeURIComponent(repo.id) })
+	);
+
 	const totalSnippets = $derived(repo.totalSnippets ?? 0);
 	const trustScore = $derived(repo.trustScore ?? 0);
 </script>
@@ -77,7 +81,7 @@
 			{repo.state === 'indexing' ? 'Indexing...' : 'Re-index'}
 		</button>
 		<a
-			href={resolveRoute('/repos/[id]', { id: repo.id })}
+			href={detailsHref}
 			class="rounded-lg border border-gray-200 px-3 py-1.5 text-sm text-gray-700 hover:bg-gray-50"
 		>
 			Details

src/lib/components/RepositoryCard.svelte.test.ts

@@ -0,0 +1,27 @@
+import { page } from 'vitest/browser';
+import { describe, expect, it, vi } from 'vitest';
+import { render } from 'vitest-browser-svelte';
+import RepositoryCard from './RepositoryCard.svelte';
+
+describe('RepositoryCard.svelte', () => {
+	it('encodes slash-bearing repository ids in the details href', async () => {
+		render(RepositoryCard, {
+			repo: {
+				id: '/facebook/react',
+				title: 'React',
+				description: 'A JavaScript library for building user interfaces',
+				state: 'indexed',
+				totalSnippets: 1234,
+				trustScore: 9.7,
+				stars: 230000,
+				lastIndexedAt: null
+			} as never,
+			onReindex: vi.fn(),
+			onDelete: vi.fn()
+		});
+
+		await expect
+			.element(page.getByRole('link', { name: 'Details' }))
+			.toHaveAttribute('href', '/repos/%2Ffacebook%2Freact');
+	});
+});