feat(mvp): phase 8 - integration, testing & deployment

Fix all build/type/lint errors (zod 3.25 compat wrapper, Svelte 5 fixes),
write 115 unit tests across 10 test files, expand seed script with demo
data, update Docker config with migration on startup.

src/routes/apps/+page.server.ts

@@ -1,6 +1,6 @@
 import type { Actions, PageServerLoad } from './$types.js';
 import { superValidate, setError } from 'sveltekit-superforms';
-import { zod } from 'sveltekit-superforms/adapters';
+import { zod } from '$lib/utils/zod-adapter.js';
 import { fail } from '@sveltejs/kit';
 import { requireAuth } from '$lib/server/middleware/authenticate.js';
 import * as appService from '$lib/server/services/appService.js';

src/routes/apps/+page.svelte

@@ -2,7 +2,6 @@
 	import type { PageData } from './$types.js';
 	import AppCard from '$lib/components/app/AppCard.svelte';
 	import AppForm from '$lib/components/app/AppForm.svelte';
-	import CardSkeleton from '$lib/components/skeleton/CardSkeleton.svelte';
 
 	let { data }: { data: PageData } = $props();
 
@@ -46,7 +45,7 @@
 				>
 					All
 				</a>
-				{#each data.categories as category}
+				{#each data.categories as category (category)}
 					<a
 						href="/apps?category={encodeURIComponent(category)}"
 						class="rounded-full border border-border px-3 py-1 text-sm text-muted-foreground transition-colors hover:bg-accent hover:text-foreground"