Add designed sticker packs (SVG art) to the reactions system

- 15 hand-designed inline-SVG stickers (faces, Hokm: حکم/کُت/crown/ace,
  Persian: chai/آفرین/rose, taunts: clown/zzz/ضعیف) in components/online/Sticker.tsx
- Sticker packs: faces (free), hokm (earned @rating 1300), persian & taunt (buy)
- In-game tray now tabbed Emoji | Stickers; stickers broadcast as "sticker:<id>"
  and render as large animated bubbles per seat
- Shop sells sticker packs; profile.ownedStickerPacks; gamification helpers
  ownedStickers/ownedStickerPackIds; mock opponents send stickers too

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/i18n.tsx

@@ -219,9 +219,11 @@ const fa: Dict = {
 
   "shop.cardstyles": "طرح کارت‌ها",
   "shop.reactions": "بسته شکلک‌ها",
+  "shop.stickers": "بسته استیکرها",
   "reward.newTitle": "عنوان جدید",
 
-  "reactions.title": "شکلک‌ها",
+  "reactions.title": "شکلک",
+  "stickers.title": "استیکر",
 };
 
 const en: Dict = {
@@ -430,9 +432,11 @@ const en: Dict = {
 
   "shop.cardstyles": "Card styles",
   "shop.reactions": "Reaction packs",
+  "shop.stickers": "Sticker packs",
   "reward.newTitle": "New title",
 
-  "reactions.title": "Reactions",
+  "reactions.title": "Emoji",
+  "stickers.title": "Stickers",
 };
 
 const DICTS: Record<Locale, Dict> = { fa, en };