feat(history): establish Telegram SaaS platform foundation

.env.example

@@ -1,7 +1,35 @@
-# ===== 灵犀跨境 前端环境变量 =====
-# 是否使用内置 Mock 服务：true = 本地模拟数据（默认）；false = 请求真实后端
-VITE_USE_MOCK=true
+# 必须生成新值，禁止提交真实密钥
+LX_DB_PASSWORD=replace-with-strong-database-password
+LX_JWT_SECRET=replace-with-at-least-32-random-characters
+LX_WEB_PORT=8088
 
-# 真实后端 API 基础地址（VITE_USE_MOCK=false 时生效）
-# 注意：请通过服务端环境变量管理密钥，前端代码中禁止放置任何真实 API Key
-VITE_API_BASE_URL=http://localhost:8080/api
+# DeepSeek Anthropic-compatible API
+DEEPSEEK_API_KEY=replace-with-rotated-deepseek-key
+DEEPSEEK_MODEL=deepseek-v4-flash
+
+# 已部署的 Telegram Gateway 服务凭据
+TELEGRAM_GATEWAY_URL=http://host.docker.internal:3000/api
+TELEGRAM_GATEWAY_TOKEN=replace-with-gateway-jwt
+TELEGRAM_GATEWAY_TENANT_ID=replace-with-gateway-tenant-id
+TELEGRAM_GATEWAY_SERVICE_EMAIL=replace-with-gateway-service-email
+TELEGRAM_GATEWAY_SERVICE_PASSWORD=replace-with-random-service-password
+TELEGRAM_GATEWAY_ACCOUNT_ID=replace-with-default-account-id
+TELEGRAM_WEBHOOK_SECRET=replace-with-random-webhook-secret
+PUBLIC_WEBHOOK_BASE_URL=http://host.docker.internal:8088
+APP_PUBLIC_URL=http://127.0.0.1:8088
+
+# 真实团队邀请邮件
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_SECURE=false
+SMTP_USER=
+SMTP_PASSWORD=
+SMTP_FROM=
+
+# 真实 Stripe Checkout
+STRIPE_SECRET_KEY=
+STRIPE_WEBHOOK_SECRET=
+STRIPE_PRICE_LITE=
+STRIPE_PRICE_STANDARD=
+STRIPE_PRICE_PRO=
+STRIPE_PRICE_GROWTH=