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>

scripts/sim.ts

@@ -92,6 +92,7 @@ function baseProfile(): UserProfile {
     ownedCardStyles: ["classic"],
     ownedTitles: ["novice"],
     ownedReactionPacks: [],
+    ownedStickerPacks: [],
     title: "novice",
     cardStyle: "classic",
     achievements: {},