Shop redesign: tactile cards + product detail sheet

Answers "what's in this pack / how much XP": shop items now carry contents
(sticker ids / emojis), xp amount, and a fa/en description. Cards are tactile
(press-3d), show the artwork + name + a quick hint (item count or +XP) + price,
with an owned check badge. Tapping a card opens a detail sheet that shows the
full contents (every sticker/emoji rendered), the XP granted, a description,
and a Buy button (gold when affordable, "need coins" otherwise).

Verified: tsc + next build clean; web rebuilt :1500.

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

src/lib/online/mock-service.ts

@@ -827,6 +827,8 @@ export class MockOnlineService implements OnlineService {
       nameEn: "Avatar",
       price: a.price!,
       preview: a.emoji,
+      descFa: "آواتار نمایه شما در بازی و جدول",
+      descEn: "Your profile avatar in games & leaderboard",
     }));
     const backItems: ShopItem[] = CARD_BACKS.filter((c) => c.price > 0).map((c) => ({
       id: c.id,
@@ -835,6 +837,8 @@ export class MockOnlineService implements OnlineService {
       nameEn: c.nameEn,
       price: c.price,
       preview: c.accent,
+      descFa: "طرح پشت کارت‌ها روی میز",
+      descEn: "The pattern on the back of your cards",
     }));
     const frontItems: ShopItem[] = CARD_FRONTS.filter((c) => c.price > 0).map((c) => ({
       id: c.id,
@@ -843,6 +847,8 @@ export class MockOnlineService implements OnlineService {
       nameEn: c.nameEn,
       price: c.price,
       preview: c.bg2,
+      descFa: "ظاهر روی کارت‌های شما",
+      descEn: "The face style of your cards",
     }));
     const reactionItems: ShopItem[] = REACTION_PACKS.filter((r) => r.price > 0).map((r) => ({
       id: r.id,
@@ -851,6 +857,9 @@ export class MockOnlineService implements OnlineService {
       nameEn: r.nameEn,
       price: r.price,
       preview: r.reactions[0],
+      contents: r.reactions,
+      descFa: `${faNum(r.reactions.length)} ایموجی برای استفاده در بازی`,
+      descEn: `${r.reactions.length} in-game emotes`,
     }));
     const stickerItems: ShopItem[] = STICKER_PACKS.filter((p) => p.price > 0).map((p) => ({
       id: p.id,
@@ -859,6 +868,9 @@ export class MockOnlineService implements OnlineService {
       nameEn: p.nameEn,
       price: p.price,
       preview: p.stickers[0], // sticker id; ShopScreen renders via <Sticker>
+      contents: p.stickers,
+      descFa: `${faNum(p.stickers.length)} استیکر برای استفاده در بازی`,
+      descEn: `${p.stickers.length} in-game stickers`,
     }));
     const xpItems: ShopItem[] = XP_PACKS.map((x) => ({
       id: x.id,
@@ -867,6 +879,9 @@ export class MockOnlineService implements OnlineService {
       nameEn: `${x.xp} XP`,
       price: x.price,
       preview: "⚡",
+      xp: x.xp,
+      descFa: `${faNum(x.xp)} امتیاز تجربه که بلافاصله به حساب اضافه می‌شود`,
+      descEn: `${x.xp} XP added to your account instantly`,
     }));
     return [...avatarItems, ...frontItems, ...backItems, ...reactionItems, ...stickerItems, ...xpItems];
   }