revert: remove billing module — already exists elsewhere

src/modules/admin-billing/admin-billing.controller.ts

@@ -1,22 +0,0 @@
-import { Controller, Get, UseGuards } from '@nestjs/common';
-import { ApiTags, ApiBearerAuth, ApiOperation } from '@nestjs/swagger';
-import { AdminBillingService } from './admin-billing.service';
-import { AdminAuthGuard } from '../../common/guards/admin-auth.guard';
-import { AdminRolesGuard } from '../../common/guards/admin-roles.guard';
-import { AdminRoles } from '../../common/decorators/admin-roles.decorator';
-import type { AdminRole } from '../../common/types/admin-role.enum';
-
-@ApiTags('admin-billing')
-@Controller('admin-api/billing')
-@UseGuards(AdminAuthGuard, AdminRolesGuard)
-@ApiBearerAuth()
-export class AdminBillingController {
-  constructor(private readonly billingService: AdminBillingService) {}
-
-  @Get()
-  @AdminRoles('SUPER_ADMIN' as AdminRole)
-  @ApiOperation({ summary: 'API 用量与费用（仅超级管理员）' })
-  async getBilling() {
-    return this.billingService.getAllBilling();
-  }
-}

src/modules/admin-billing/admin-billing.module.ts

@@ -1,11 +0,0 @@
-import { Module } from '@nestjs/common';
-import { AdminBillingController } from './admin-billing.controller';
-import { AdminBillingService } from './admin-billing.service';
-import { AdminAuthGuard } from '../../common/guards/admin-auth.guard';
-import { AdminRolesGuard } from '../../common/guards/admin-roles.guard';
-
-@Module({
-  controllers: [AdminBillingController],
-  providers: [AdminBillingService, AdminAuthGuard, AdminRolesGuard],
-})
-export class AdminBillingModule {}

src/modules/admin-billing/admin-billing.service.ts

@@ -1,98 +0,0 @@
-import { Injectable, Logger } from '@nestjs/common';
-
-export interface BillingInfo {
-  name: string;
-  model: string;
-  balance: string;
-  currency: string;
-  status: 'ok' | 'unknown';
-  consoleUrl: string;
-  note: string;
-}
-
-@Injectable()
-export class AdminBillingService {
-  private readonly logger = new Logger(AdminBillingService.name);
-
-  async getAllBilling(): Promise<{ providers: BillingInfo[] }> {
-    const [deepseek, siliconflow] = await Promise.all([
-      this.getDeepSeek(),
-      this.getSiliconFlow(),
-    ]);
-
-    return {
-      providers: [
-        deepseek,
-        siliconflow,
-        this.getMiniMax(),
-        this.getBaiduOcr(),
-      ],
-    };
-  }
-
-  private async getDeepSeek(): Promise<BillingInfo> {
-    try {
-      const resp = await fetch('https://api.deepseek.com/user/balance', {
-        headers: { Authorization: 'Bearer sk-ddddea4986d843be978ced9e82988fa0' },
-      });
-      const data = await resp.json();
-      const bal = data?.balance_infos?.[0]?.total_balance;
-      return {
-        name: 'DeepSeek',
-        model: 'deepseek-v4-flash / deepseek-chat',
-        balance: bal ? `¥${bal}` : '—',
-        currency: 'CNY',
-        status: 'ok',
-        consoleUrl: 'https://platform.deepseek.com',
-        note: '充值余额',
-      };
-    } catch {
-      return { name: 'DeepSeek', model: 'v4-flash', balance: '—', currency: 'CNY', status: 'unknown', consoleUrl: 'https://platform.deepseek.com', note: '查询失败' };
-    }
-  }
-
-  private async getSiliconFlow(): Promise<BillingInfo> {
-    try {
-      const resp = await fetch('https://api.siliconflow.cn/v1/user/info', {
-        headers: { Authorization: 'Bearer sk-jdtqzgrlneklatdmymscrnvljvzlkkxcrzylznufpgggswjz' },
-      });
-      const data = await resp.json();
-      const bal = data?.data?.totalBalance;
-      return {
-        name: '硅基流动',
-        model: 'BGE-M3 / BGE-Reranker',
-        balance: bal ? `¥${bal}` : '—',
-        currency: 'CNY',
-        status: 'ok',
-        consoleUrl: 'https://cloud.siliconflow.cn',
-        note: '充值 + 赠送余额',
-      };
-    } catch {
-      return { name: '硅基流动', model: 'Embedding/Rerank', balance: '—', currency: 'CNY', status: 'unknown', consoleUrl: 'https://cloud.siliconflow.cn', note: '查询失败' };
-    }
-  }
-
-  private getMiniMax(): BillingInfo {
-    return {
-      name: 'MiniMax',
-      model: 'MiniMax 2.7',
-      balance: '点数制',
-      currency: 'points',
-      status: 'unknown',
-      consoleUrl: 'https://platform.minimaxi.com',
-      note: '按点数计费，需登录控制台查看',
-    };
-  }
-
-  private getBaiduOcr(): BillingInfo {
-    return {
-      name: '百度 OCR',
-      model: '通用文字识别',
-      balance: '次数制',
-      currency: 'calls',
-      status: 'unknown',
-      consoleUrl: 'https://console.bce.baidu.com',
-      note: '按调用次数计费，需登录控制台查看',
-    };
-  }
-}