feat(admin,player,api): 玩家账号密码管理与代理上下分

新增玩家头像、可查密码与全局改密/改账号开关；玩家资料页合并账号密码展示；代理直属玩家列表支持自定义上下分。

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

apps/api/src/shared/config/system-config.module.ts

@@ -0,0 +1,9 @@
+import { Global, Module } from '@nestjs/common';
+import { SystemConfigService } from './system-config.service';
+
+@Global()
+@Module({
+  providers: [SystemConfigService],
+  exports: [SystemConfigService],
+})
+export class SystemConfigModule {}

apps/api/src/shared/config/system-config.service.ts

@@ -0,0 +1,59 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+
+export const PLAYER_ALLOW_PASSWORD_CHANGE = 'player.allow_password_change';
+export const PLAYER_ALLOW_USERNAME_CHANGE = 'player.allow_username_change';
+
+export type PlayerAccountSettings = {
+  allowPasswordChange: boolean;
+  allowUsernameChange: boolean;
+};
+
+@Injectable()
+export class SystemConfigService {
+  constructor(private prisma: PrismaService) {}
+
+  async getBoolean(key: string, defaultValue: boolean): Promise<boolean> {
+    const row = await this.prisma.systemConfig.findUnique({ where: { configKey: key } });
+    if (!row) return defaultValue;
+    return row.configValue === 'true' || row.configValue === '1';
+  }
+
+  async setBoolean(key: string, value: boolean, description?: string) {
+    await this.prisma.systemConfig.upsert({
+      where: { configKey: key },
+      create: {
+        configKey: key,
+        configValue: value ? 'true' : 'false',
+        description,
+      },
+      update: { configValue: value ? 'true' : 'false' },
+    });
+  }
+
+  async getPlayerAccountSettings(): Promise<PlayerAccountSettings> {
+    const [allowPasswordChange, allowUsernameChange] = await Promise.all([
+      this.getBoolean(PLAYER_ALLOW_PASSWORD_CHANGE, true),
+      this.getBoolean(PLAYER_ALLOW_USERNAME_CHANGE, false),
+    ]);
+    return { allowPasswordChange, allowUsernameChange };
+  }
+
+  async updatePlayerAccountSettings(data: Partial<PlayerAccountSettings>) {
+    if (data.allowPasswordChange !== undefined) {
+      await this.setBoolean(
+        PLAYER_ALLOW_PASSWORD_CHANGE,
+        data.allowPasswordChange,
+        '玩家是否可在客户端修改密码',
+      );
+    }
+    if (data.allowUsernameChange !== undefined) {
+      await this.setBoolean(
+        PLAYER_ALLOW_USERNAME_CHANGE,
+        data.allowUsernameChange,
+        '玩家是否可在客户端修改登录账号名',
+      );
+    }
+    return this.getPlayerAccountSettings();
+  }
+}