release(secrets-mcp): 0.5.5 — 生产 CORS 显式 allow_methods，修复 tower-http 启动 panic

credentials + wildcard methods/headers 被 tower-http 禁止；生产环境改为 GET/POST/PATCH/DELETE/OPTIONS 白名单。

Cargo.lock

@@ -2066,7 +2066,7 @@ dependencies = [
 
 [[package]]
 name = "secrets-mcp"
-version = "0.5.4"
+version = "0.5.5"
 dependencies = [
  "anyhow",
  "askama",

crates/secrets-mcp/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "secrets-mcp"
-version = "0.5.4"
+version = "0.5.5"
 edition.workspace = true
 
 [[bin]]

crates/secrets-mcp/src/main.rs

@@ -250,12 +250,26 @@ fn production_allowed_headers() -> [axum::http::HeaderName; 5] {
     ]
 }
 
+/// Production CORS allowed methods.
+///
+/// Keep this list explicit because tower-http rejects
+/// `allow_credentials(true)` together with `allow_methods(Any)`.
+fn production_allowed_methods() -> [axum::http::Method; 5] {
+    [
+        axum::http::Method::GET,
+        axum::http::Method::POST,
+        axum::http::Method::PATCH,
+        axum::http::Method::DELETE,
+        axum::http::Method::OPTIONS,
+    ]
+}
+
 /// Build the CORS layer for the application.
 ///
 /// In production mode the origin is restricted to the BASE_URL origin
 /// (scheme://host:port, path stripped) and credentials are allowed.
-/// `allow_headers` uses an explicit whitelist to avoid the tower-http
-/// restriction on `allow_credentials(true)` + `allow_headers(Any)`.
+/// `allow_headers` and `allow_methods` use explicit whitelists to avoid the
+/// tower-http restriction on `allow_credentials(true)` + wildcards.
 ///
 /// In development mode all origins, methods and headers are allowed.
 fn build_cors_layer(base_url: &str, is_production: bool) -> CorsLayer {
@@ -272,7 +286,7 @@ fn build_cors_layer(base_url: &str, is_production: bool) -> CorsLayer {
         };
         CorsLayer::new()
             .allow_origin(allowed_origin)
-            .allow_methods(Any)
+            .allow_methods(production_allowed_methods())
             .allow_headers(production_allowed_headers())
             .allow_credentials(true)
     } else {
@@ -304,6 +318,16 @@ mod tests {
         assert!(names.contains(&"x-mcp-session"));
     }
 
+    #[test]
+    fn production_cors_methods_include_all_required() {
+        let methods = production_allowed_methods();
+        assert!(methods.contains(&axum::http::Method::GET));
+        assert!(methods.contains(&axum::http::Method::POST));
+        assert!(methods.contains(&axum::http::Method::PATCH));
+        assert!(methods.contains(&axum::http::Method::DELETE));
+        assert!(methods.contains(&axum::http::Method::OPTIONS));
+    }
+
     #[test]
     fn production_cors_normalizes_base_url_with_path() {
         let url = url::Url::parse("https://secrets.example.com/secrets/app").unwrap();