Match intro "players joining" loading screen + i18n fix; checkpoint

- MatchIntroOverlay: UNO-style pre-game reveal — the 4 seats animate into the
  table (with "?" placeholders until each player's data streams in for live
  matches), a 3-2-1-GO countdown, then the table shows. Wired via game-store
  matchIntroPending/consumeIntro, rendered online-only in GameScreen.
- Fix: intro.found / intro.getReady / intro.go existed only in the Persian dict;
  added the English strings (would have shown raw keys to EN users).
- Checkpoint of the in-progress UI/social batch (CoinsPill, shop titles section,
  friend-request rate limit, etc.) — all green.

Verified: tsc + next build + scripts/sim.ts + dotnet build server/Hokm.slnx all pass.

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

src/lib/online/gamification.ts

@@ -134,9 +134,9 @@ export function leagueById(id: string): MatchLeague {
 
 /** Coin-priced XP packs (XP is intentionally expensive). Server-authoritative. */
 export const XP_PACKS: { id: string; xp: number; price: number }[] = [
-  { id: "xp1", xp: 200, price: 5000 },
-  { id: "xp2", xp: 600, price: 12000 },
-  { id: "xp3", xp: 1500, price: 25000 },
+  { id: "xp1", xp: 200, price: 1500 },
+  { id: "xp2", xp: 600, price: 4000 },
+  { id: "xp3", xp: 1500, price: 8000 },
 ];
 
 /* ------------------------------- XP ---------------------------------- */
@@ -250,7 +250,7 @@ function tier(
     category,
     metric,
     goal: g,
-    coinReward: Math.max(100, Math.round((80 + g * 12) / 50) * 50),
+    coinReward: Math.min(1500, Math.max(50, Math.round((40 + g * 6) / 50) * 50)),
     icon,
     nameFa: faName(faNum(g)),
     nameEn: enName(g),
@@ -287,11 +287,11 @@ export const ACHIEVEMENTS: AchievementDef[] = [
     (g) => `${g} باخت`, (g) => `${g} Losses`,
     (g) => `با وجود ${g} باخت ادامه دهید`, (g) => `Persevere through ${g} losses`),
   // ranks (explicit rating floors)
-  { id: "reach_silver", category: "rank", ratingFloor: 1100, goal: 1, coinReward: 200, icon: "🥈", nameFa: "لیگ نقره", nameEn: "Reach Silver", descFa: "به لیگ نقره برسید", descEn: "Reach the Silver league" },
-  { id: "reach_gold", category: "rank", ratingFloor: 1300, goal: 1, coinReward: 500, icon: "🥇", nameFa: "لیگ طلا", nameEn: "Reach Gold", descFa: "به لیگ طلا برسید", descEn: "Reach the Gold league" },
-  { id: "reach_platinum", category: "rank", ratingFloor: 1500, goal: 1, coinReward: 1000, icon: "🛡️", nameFa: "لیگ پلاتین", nameEn: "Reach Platinum", descFa: "به لیگ پلاتین برسید", descEn: "Reach the Platinum league" },
-  { id: "reach_diamond", category: "rank", ratingFloor: 1700, goal: 1, coinReward: 2000, icon: "💠", nameFa: "لیگ الماس", nameEn: "Reach Diamond", descFa: "به لیگ الماس برسید", descEn: "Reach the Diamond league" },
-  { id: "reach_master", category: "rank", ratingFloor: 1900, goal: 1, coinReward: 4000, icon: "👑", nameFa: "لیگ استاد", nameEn: "Reach Master", descFa: "به لیگ استاد برسید", descEn: "Reach the Master league" },
+  { id: "reach_silver", category: "rank", ratingFloor: 1100, goal: 1, coinReward: 150, icon: "🥈", nameFa: "لیگ نقره", nameEn: "Reach Silver", descFa: "به لیگ نقره برسید", descEn: "Reach the Silver league" },
+  { id: "reach_gold", category: "rank", ratingFloor: 1300, goal: 1, coinReward: 300, icon: "🥇", nameFa: "لیگ طلا", nameEn: "Reach Gold", descFa: "به لیگ طلا برسید", descEn: "Reach the Gold league" },
+  { id: "reach_platinum", category: "rank", ratingFloor: 1500, goal: 1, coinReward: 500, icon: "🛡️", nameFa: "لیگ پلاتین", nameEn: "Reach Platinum", descFa: "به لیگ پلاتین برسید", descEn: "Reach the Platinum league" },
+  { id: "reach_diamond", category: "rank", ratingFloor: 1700, goal: 1, coinReward: 900, icon: "💠", nameFa: "لیگ الماس", nameEn: "Reach Diamond", descFa: "به لیگ الماس برسید", descEn: "Reach the Diamond league" },
+  { id: "reach_master", category: "rank", ratingFloor: 1900, goal: 1, coinReward: 1500, icon: "👑", nameFa: "لیگ استاد", nameEn: "Reach Master", descFa: "به لیگ استاد برسید", descEn: "Reach the Master league" },
 ];
 
 function metricValue(metric: NonNullable<AchievementDef["metric"]>, stats: PlayerStats, level: number): number {
@@ -753,7 +753,7 @@ export function applyMatchResult(
 
 /* --------------------------- Daily reward ---------------------------- */
 
-export const DAILY_REWARDS = [300, 500, 750, 1000, 1500, 2500, 7500];
+export const DAILY_REWARDS = [100, 150, 200, 300, 400, 600, 1500];
 
 export function dailyRewardFor(day: number): number {
   return DAILY_REWARDS[Math.min(day, DAILY_REWARDS.length) - 1] ?? 100;