AGC 支持 Anthropic 独立网关路由与后台协议选项

新增平台 Anthropic 网关路由 /api/llm/anthropic/{*path}，复用账号 Router 凭据边界
OpenAI 侧规范路径改为 /api/llm/v1/responses 与 /api/llm/v1/chat/completions，旧路径保留兼容
baseUrl 不再携带路由与版本段，统一由协议自己拼 v1/<op>
cc 执行器改走平台网关，ANTHROPIC_AUTH_TOKEN 复用平台会话，不再直连 Router
后台模型目录 agentMode 增加 anthropic，管理页与客户端契约同步
补齐三条路由埋点与静态段白名单，新增三条回归测试
同步后端架构文档、模型别名文档与排障记忆

server-rs/crates/api-server/src/modules/platform.rs

@@ -9,7 +9,7 @@ use crate::{
     auth::require_bearer_auth,
     llm::{
         LLM_REQUEST_MAX_BODY_BYTES, list_llm_models, proxy_llm_chat_completions,
-        proxy_llm_responses,
+        proxy_llm_messages, proxy_llm_responses,
     },
     state::AppState,
     volcengine_speech::{
@@ -36,6 +36,15 @@ pub fn router(state: AppState) -> Router<AppState> {
                 ))
                 .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
         )
+        .route(
+            "/api/llm/v1/chat/completions",
+            post(proxy_llm_chat_completions)
+                .route_layer(middleware::from_fn_with_state(
+                    state.clone(),
+                    require_bearer_auth,
+                ))
+                .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
+        )
         .route(
             "/api/llm/responses",
             post(proxy_llm_responses)
@@ -45,6 +54,27 @@ pub fn router(state: AppState) -> Router<AppState> {
                 ))
                 .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
         )
+        .route(
+            "/api/llm/v1/responses",
+            post(proxy_llm_responses)
+                .route_layer(middleware::from_fn_with_state(
+                    state.clone(),
+                    require_bearer_auth,
+                ))
+                .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
+        )
+        // Anthropic 客户端（Claude Agent SDK / Claude Code CLI）固定请求
+        // `{ANTHROPIC_BASE_URL}/v1/messages`，所以这里只声明 Anthropic 自己的
+        // 路由前缀，尾段交给上游协议本身，网关不自己发明版本段。
+        .route(
+            "/api/llm/anthropic/{*path}",
+            post(proxy_llm_messages)
+                .route_layer(middleware::from_fn_with_state(
+                    state.clone(),
+                    require_bearer_auth,
+                ))
+                .layer(DefaultBodyLimit::max(LLM_REQUEST_MAX_BODY_BYTES)),
+        )
         .route(
             "/api/speech/volcengine/config",
             get(get_volcengine_speech_config).route_layer(middleware::from_fn_with_state(

server-rs/crates/api-server/src/tracking.rs

@@ -602,6 +602,15 @@ fn resolve_route_tracking_spec(method: &Method, path: &str) -> Option<RouteTrack
             Some(route_spec("llm_request", "llm", User, "anonymous"))
         }
         ("POST", "/api/llm/responses") => Some(route_spec("llm_request", "llm", User, "anonymous")),
+        ("POST", "/api/llm/v1/responses") => {
+            Some(route_spec("llm_request", "llm", User, "anonymous"))
+        }
+        ("POST", "/api/llm/v1/chat/completions") => {
+            Some(route_spec("llm_request", "llm", User, "anonymous"))
+        }
+        ("POST", "/api/llm/anthropic/v1/messages") => {
+            Some(route_spec("llm_request", "llm", User, "anonymous"))
+        }
         ("GET", "/api/speech/volcengine/config") => Some(route_spec(
             "speech_config_view",
             "speech",
@@ -946,6 +955,7 @@ fn is_known_static_route_segment(segment: &str) -> bool {
     matches!(
         segment,
         "ai" | "analytics"
+            | "anthropic"
             | "api"
             | "api-keys"
             | "asr"
@@ -988,11 +998,13 @@ fn is_known_static_route_segment(segment: &str) -> bool {
             | "library"
             | "llm"
             | "login"
+            | "messages"
             | "optimizations"
             | "login-options"
             | "logout"
             | "logout-all"
             | "me"
+            | "responses"
             | "metric"
             | "objects"
             | "orders"
@@ -1616,6 +1628,35 @@ mod tests {
         );
     }
 
+    #[test]
+    fn llm_gateway_protocol_paths_keep_their_tracking_specs() {
+        // 协议路径段必须保持静态，否则归一化会把 Anthropic 路由打成
+        // `/api/llm/{id}/v1/{id}`，埋点永远匹配不上。
+        assert_eq!(
+            normalize_route_path("/api/llm/anthropic/v1/messages"),
+            "/api/llm/anthropic/v1/messages"
+        );
+        assert_eq!(
+            normalize_route_path("/api/llm/v1/responses"),
+            "/api/llm/v1/responses"
+        );
+        assert_eq!(
+            normalize_route_path("/api/llm/v1/chat/completions"),
+            "/api/llm/v1/chat/completions"
+        );
+
+        for path in [
+            "/api/llm/v1/responses",
+            "/api/llm/v1/chat/completions",
+            "/api/llm/anthropic/v1/messages",
+        ] {
+            let spec = resolve_route_tracking_spec(&Method::POST, path)
+                .unwrap_or_else(|| panic!("{path} should keep the llm_request spec"));
+            assert_eq!(spec.event_key, "llm_request");
+            assert_eq!(spec.module_key, "llm");
+        }
+    }
+
     #[test]
     fn active_runtime_settings_routes_keep_tracking_specs() {
         for (method, event_key) in [