feat(player): 注册账号、登录双模式与移动端性能优化

注册必填 7-32 位账号，手机号区号/本地号分存；登录默认账号模式并支持切换手机号登录；Player i18n 拆包与赛事接口优化。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/prisma/schema.prisma

@@ -85,6 +85,8 @@ model UserPreference {
   userId              BigInt   @unique @map("user_id")
   locale              String   @default("en-US") @db.VarChar(10)
   phone               String?  @db.VarChar(32)
+  phoneCountryDial    String?  @map("phone_country_dial") @db.VarChar(8)
+  phoneLocal          String?  @map("phone_local") @db.VarChar(24)
   email               String?  @db.VarChar(128)
   avatarKey           String?  @map("avatar_key") @db.VarChar(128)
   allowPasswordChange Boolean  @default(true) @map("allow_password_change")
@@ -95,6 +97,7 @@ model UserPreference {
 
   user      User     @relation(fields: [userId], references: [id])
 
+  @@index([phoneCountryDial, phoneLocal])
   @@map("user_preferences")
 }