Follow the copy pass: tests, docs, version, SW

The pushed copy pass renames the library heading to "Your freezer"
("Tvůj mrazák" in Czech) and reworks the gate subtitle plus several
Czech strings. Five suites pinned the old heading — regression, i18n,
native, wizard and providers — and now assert the new one; the README
prose and project tree follow. Key parity is unchanged.

Version 0.5.9, SW -> freezmo-v81.

README.md

@@ -307,7 +307,7 @@ TEXT_MODEL=gpt-oss:120b-cloud
 
 1. Open the app — the **key gate** asks for a key on first visit.
 2. Create one at <https://ollama.com/settings/keys>, paste it in and press **Continue**.
-3. The gate validates it with a real 1-token request, then drops you into the icebox.
+3. The gate validates it with a real 1-token request, then drops you into the freezer.
    **Settings → Test connection** re-checks any time and shows the model list.
 
 Where the key lives:
@@ -832,7 +832,7 @@ app/
   manifest.ts                web app manifest (installable PWA)
   offline/page.tsx           offline fallback served by the service worker
   globals.css                Tailwind v4 theme, frosty palette, animations, reduced-motion
-  page.tsx                   library ("Your icebox")
+  page.tsx                   library ("Your freezer")
   create/page.tsx            upload screen
   deck/[id]/page.tsx         study feed for a saved deck
   homework/page.tsx          “Make my homework” (assignment in, homework or guide out)
@@ -1423,6 +1423,13 @@ Things I chose while building, with the reasoning:
     (measured: 268..1280 at a 1280 window) — a flat pane floating 40px inside the scene read as
     "cut off next to the sidebar".
 
+90. **Copy pass on the shell (`lib/i18n-dict.ts`).** A user-authored wording pass: the library heading
+    is now "Your freezer" (matching the Czech "Tvůj mrazák"), the key gate's subtitle speaks about
+    grades ("První krok k dobrým známkám"), and several Czech strings read more naturally ("Schovat /
+    Prodloužit panel", "Vibrace na podporovaných zařízení", "Všechno je uloženo v tomto prohlížeči",
+    "Vizuální model (překládá fotky na text)", "radši ověř"). The five suites that pinned the old
+    library heading were updated with it; key parity is unchanged.
+
 89. **Codebase-wide audit (bugs, performance, dead code, edge cases).**
     - *Bugs fixed:* Backup schema now accepts `theme: "aero"` (backups exported under Frutiger Aero
       used to fail `parseBackup` on import), and `applyImport` in `"replace"` mode now replaces SRS