Redesign the quick-action CTAs: two ways in (study deck vs. homework)

Library empty state ("Your icebox")
- Replace the single "Make your first deck" button with two quick-action
  cards: "Create interactive test" (primary, ice-gradient icon + subtle
  accent border) and "Help me with my homework" (glass card, sparkles
  icon). Stacked on phones, side by side from 640px up; both >=44px tall.

/create
- Replace the "Got homework instead of notes?" banner with a two-card mode
  switcher above "1. Add your notes": "Study Deck & Quizzes" (the current
  view — aria-current, accent tint, ice icon) and "Homework Solver" (a
  shortcut to /homework). Icon-on-top tiles on phones, inline rows from
  640px up; glass tokens + backdrop blur in both themes.

Strings
- New keys in both dictionaries: emptyStateCreateDeck, emptyStateHomework,
  actionStudyDeck, actionHomework. Drop the now-unused homework.entry and
  library.makeFirst keys.

Drive-by AA fix (light mode, /create only)
- The "New folder" dashed button and the difficulty blurbs move from
  frost-500 to frost-600 (4.0:1 -> ~6:1). Dark mode is unchanged.

Service worker: freezmo-v8.

Verified: redesign suite 32/32 (stacked/side-by-side layouts, 360/390/1280,
dark+light, en+cs, >=44px targets, both cards navigate, no overflow, axe
contrast), mobile 49/49, i18n 27/27, desktop regression 73/73. Lint + build
clean.

lib/i18n-dict.ts

@@ -172,7 +172,6 @@ const en: Record<string, string> = {
   "homework.title": "Make my homework",
   "homework.subtitle":
     "Paste the assignment, snap a photo or add a document — then choose whether I should just do it, or guide you through it.",
-  "homework.entry": "Got homework instead of notes?",
   "homework.source.title": "1. The assignment",
   "homework.source.help": "Paste its text, drop photos, or add a document.",
   "homework.source.textLabel": "Assignment text",
@@ -224,6 +223,12 @@ const en: Record<string, string> = {
   "homework.history.openTitle": "Open “{title}”",
   "homework.history.deleteConfirm": "Delete this result?",
 
+  /* quick actions (library empty state + /create switcher) ----------- */
+  "emptyStateCreateDeck": "Create interactive test",
+  "emptyStateHomework": "Help me with my homework",
+  "actionStudyDeck": "Study Deck & Quizzes",
+  "actionHomework": "Homework Solver",
+
   /* library --------------------------------------------------------- */
   "library.title": "Your icebox",
   "library.subtitle": "Decks frozen from your notes, saved in this browser.",
@@ -235,7 +240,6 @@ const en: Record<string, string> = {
   "library.deckMoved": "Deck moved.",
   "library.deckMovedUnorganized": "Deck moved to Unorganized.",
   "library.noDecks": "No decks yet",
-  "library.makeFirst": "Make your first deck",
   "library.emptyBody": "Freeze a page of notes into a feed of flashcards and quizzes.",
   "library.emptyHint": "Using your own Ollama models —",
   "library.emptySettings": "check the connection in Settings",
@@ -752,7 +756,6 @@ const cs: Record<string, string> = {
   "homework.title": "Udělej mi úkol",
   "homework.subtitle":
     "Vlož zadání, vyfoť ho nebo přidej dokument — a pak si vyber, jestli to mám rovnou udělat, nebo tě tím provést.",
-  "homework.entry": "Máš místo poznámek úkol?",
   "homework.source.title": "1. Zadání",
   "homework.source.help": "Vlož jeho text, přetáhni fotky nebo přidej dokument.",
   "homework.source.textLabel": "Text zadání",
@@ -804,6 +807,12 @@ const cs: Record<string, string> = {
   "homework.history.openTitle": "Otevřít „{title}“",
   "homework.history.deleteConfirm": "Smazat tento výsledek?",
 
+  /* quick actions (library empty state + /create switcher) ----------- */
+  "emptyStateCreateDeck": "Vytvořit interaktivní test",
+  "emptyStateHomework": "Pomoct s úkolem",
+  "actionStudyDeck": "Studijní balíček a testy",
+  "actionHomework": "Řešitel úkolů",
+
   /* library --------------------------------------------------------- */
   "library.title": "Tvoje mraznička",
   "library.subtitle": "Sady zmrazené z tvých poznámek, uložené v tomto prohlížeči.",
@@ -815,7 +824,6 @@ const cs: Record<string, string> = {
   "library.deckMoved": "Sada přesunuta.",
   "library.deckMovedUnorganized": "Sada přesunuta do Nezařazených.",
   "library.noDecks": "Zatím žádné sady",
-  "library.makeFirst": "Vytvoř si první sadu",
   "library.emptyBody": "Zmraz stránku poznámek do feedu kartiček a kvízů.",
   "library.emptyHint": "S tvými vlastními modely Ollama —",
   "library.emptySettings": "zkontroluj připojení v Nastavení",