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.

components/TabBar.tsx

@@ -0,0 +1,47 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+
+import { GearIcon, HomeIcon, PlusIcon } from "@/components/icons";
+import { openSettings } from "@/lib/ui-events";
+import { cn } from "@/lib/utils";
+
+/**
+ * iOS-style bottom tab bar. Rendered on the library and create screens on
+ * phones; hidden on desktop (the header carries the same actions there) and on
+ * the full-screen study feed.
+ */
+export function TabBar() {
+  const pathname = usePathname();
+
+  const item = "flex flex-1 flex-col items-center justify-center gap-1 py-2 text-[11px] font-medium transition-colors";
+  const active = "text-[var(--text)]";
+  const idle = "text-[var(--text-subtle)]";
+
+  return (
+    <nav
+      aria-label="Main"
+      className="tabbar fixed inset-x-0 bottom-0 z-40 flex items-stretch pb-safe sm:hidden"
+    >
+      <Link href="/" aria-current={pathname === "/" ? "page" : undefined} className={cn(item, pathname === "/" ? active : idle)}>
+        <HomeIcon className="size-6" />
+        Library
+      </Link>
+      <Link
+        href="/create"
+        aria-current={pathname === "/create" ? "page" : undefined}
+        className={cn(item, pathname === "/create" ? active : idle)}
+      >
+        <span className="grid size-6 place-items-center rounded-full bg-[var(--text)] text-white dark:bg-white dark:text-[#0d0d0d]">
+          <PlusIcon className="size-4" />
+        </span>
+        New deck
+      </Link>
+      <button type="button" onClick={openSettings} className={cn(item, idle)}>
+        <GearIcon className="size-6" />
+        Settings
+      </button>
+    </nav>
+  );
+}