Freezmo: self-hosted notes-to-activities study app

Next.js 15 app that turns photos, PDFs, DOCX/PPTX and text into a swipeable
feed of AI-generated activities (flashcards, multiple choice, true/false,
fill-in-the-blank, matching, ordering, short answer) using the user's own
Ollama models.

Highlights:
- All AI calls run in server route handlers; the browser never talks to Ollama.
- Bring-your-own-key mode (default): the key lives only in the browser and is
  sent per-request; server, local-daemon and shared-key modes also supported.
- Client-side document extraction (pdf.js, mammoth, jszip) with scanned-PDF
  page rendering for the vision model; notes stay in their original language.
- ChatGPT-style shell: collapsible sidebar / mobile drawer, neutral token-based
  light + dark themes, folder organisation, PWA (manifest, SW, offline page).
- Strict JSON validation with zod + auto-repair, rate limiting, and request
  guards (cross-origin, body-size, API-key sanitising).
- setup.sh bootstraps deps, .env.local and a production build.

Gitignore excludes .env*, the generated pdf.js worker and local scratch files.

app/deck/[id]/page.tsx

@@ -0,0 +1,66 @@
+"use client";
+
+import Link from "next/link";
+import { useParams } from "next/navigation";
+import { useEffect, useState } from "react";
+
+import { StudyFeed } from "@/components/StudyFeed";
+import { Button, Spinner } from "@/components/ui";
+import type { Deck } from "@/lib/schemas";
+import { getDeck } from "@/lib/storage";
+
+export default function DeckPage() {
+  const params = useParams<{ id: string }>();
+  const id = typeof params.id === "string" ? params.id : "";
+  const [deck, setDeck] = useState<Deck | null>(null);
+  const [loaded, setLoaded] = useState(false);
+
+  useEffect(() => {
+    if (!id) {
+      setLoaded(true);
+      return;
+    }
+    setDeck(getDeck(id) ?? null);
+    setLoaded(true);
+  }, [id]);
+
+  if (!loaded) {
+    return (
+      <main className="frost-bg grid min-h-dvh place-items-center">
+        <div className="relative flex items-center gap-3 text-sm font-semibold text-frost-800 dark:text-frost-100">
+          <Spinner className="size-5" /> Loading your deck…
+        </div>
+      </main>
+    );
+  }
+
+  if (!deck) {
+    return (
+      <main className="frost-bg grid min-h-dvh place-items-center px-4">
+        <div className="card relative max-w-md space-y-3 p-6 text-center">
+          <p className="text-4xl" aria-hidden>
+            🧊
+          </p>
+          <h1 className="text-xl font-extrabold text-frost-950 dark:text-frost-50">Deck not found</h1>
+          <p className="text-sm text-slate-600 dark:text-slate-300">
+            This deck isn&apos;t in this browser&apos;s library. It may have been deleted, or it was
+            created in a different browser profile.
+          </p>
+          <div className="flex justify-center gap-2 pt-1">
+            <Link
+              href="/"
+              className="inline-flex items-center gap-2 rounded-2xl bg-accent-600 px-4 py-2.5 text-sm font-semibold text-white transition-colors hover:bg-accent-700"
+            >
+              Back to library
+            </Link>
+            <Link href="/create">
+              <Button variant="secondary">Create a deck</Button>
+            </Link>
+          </div>
+        </div>
+      </main>
+    );
+  }
+
+  return <StudyFeed key={deck.id} deck={deck} />;
+}