cleanup(#340): config architecture cleanup — protocol removal + accounts rename

.env.example

@@ -13,11 +13,18 @@
 # These ports must not conflict with other local services.
 # Default: Frontend 3003, API 3004, Redis 6399
 # Convention: API port = Frontend port + 1 (same as internal 3001→3002)
+#
+# Reverse proxy / remote access 反向代理 / 远端访问:
+#   Behind Nginx (port 80/443), the frontend auto-detects same-origin
+#   and routes /api/ + /socket.io/ through the proxy — no env var needed.
+#   Only set NEXT_PUBLIC_API_URL if you need a non-standard API endpoint.
+#   Also set FRONTEND_URL on the API side for CORS (see below).
 
 FRONTEND_PORT=3003
 API_SERVER_PORT=3004
 MCP_SERVER_PORT=3011
 NEXT_PUBLIC_API_URL=http://localhost:3004
+# FRONTEND_URL=http://your-public-ip  # CORS: set when API is accessed from a public domain/IP
 NEXT_PUBLIC_BRAND_NAME="Clowder AI"
 
 # CLI inactivity timeout in milliseconds.
@@ -37,20 +44,6 @@ NEXT_PUBLIC_BRAND_NAME="Clowder AI"
 REDIS_PORT=6399
 REDIS_URL=redis://localhost:6399
 
-# ── Model API Keys 模型密钥（推荐通过 UI 配置）───────────────
-# RECOMMENDED: Add API keys via the web UI after launch:
-#   Hub → System Settings → Account Configuration
-# 推荐方式：启动后在前端 UI 添加 API key：
-#   Hub → 系统配置 → 账号配置
-#
-# The env vars below are a legacy fallback. Leave them commented out
-# unless you have a specific reason to use them.
-# 以下环境变量仅作兼容兜底，通常不需要填写。
-
-# ANTHROPIC_API_KEY=               # Claude — https://console.anthropic.com/
-# OPENAI_API_KEY=                  # GPT / Codex — https://platform.openai.com/
-# GOOGLE_API_KEY=                  # Gemini — https://aistudio.google.com/
-
 # ── Optional: API Gateway Proxy 反向代理（可选）──────────────
 # Route API calls through a custom gateway (e.g. load balancer).
 # 通过自定义网关路由 API 调用（如负载均衡器）。