fix(mcp): remove SSE support; keep stdio default when type is omitted

- Backend: reject "sse" in validators; accept missing type as stdio; require url only for http (mcp.rs, claude_mcp.rs)
- Frontend: McpServer.type narrowed to "stdio" | "http" (optional) (src/types.ts)
- UI: avoid undefined in list item details (McpListItem)
- Claude-only sync after delete to update ~/.claude.json (commands.rs)

Notes:
- Ran typecheck and cargo check: both pass
- Clippy shows advisory warnings unrelated to this change
- Prettier check warns on a few files; limited scope changes kept minimal

src-tauri/src/app_config.rs

@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 
-/// MCP 配置：集中存放于 ~/.cc-switch/config.json
+/// MCP 配置：单客户端维度（claude 或 codex 下的一组服务器）
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct McpConfig {
     /// 以 id 为键的服务器定义（宽松 JSON 对象，包含 enabled/source 等 UI 辅助字段）
@@ -9,6 +9,24 @@ pub struct McpConfig {
     pub servers: HashMap<String, serde_json::Value>,
 }
 
+/// MCP 根：按客户端分开维护（无历史兼容压力，直接以 v2 结构落地）
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct McpRoot {
+    #[serde(default)]
+    pub claude: McpConfig,
+    #[serde(default)]
+    pub codex: McpConfig,
+}
+
+impl Default for McpRoot {
+    fn default() -> Self {
+        Self {
+            claude: McpConfig::default(),
+            codex: McpConfig::default(),
+        }
+    }
+}
+
 use crate::config::{copy_file, get_app_config_dir, get_app_config_path, write_json_file};
 use crate::provider::ProviderManager;
 
@@ -46,9 +64,9 @@ pub struct MultiAppConfig {
     /// 应用管理器（claude/codex）
     #[serde(flatten)]
     pub apps: HashMap<String, ProviderManager>,
-    /// MCP 配置
+    /// MCP 配置（按客户端分治）
     #[serde(default)]
-    pub mcp: McpConfig,
+    pub mcp: McpRoot,
 }
 
 fn default_version() -> u32 {
@@ -64,7 +82,7 @@ impl Default for MultiAppConfig {
         Self {
             version: 2,
             apps,
-            mcp: McpConfig::default(),
+            mcp: McpRoot::default(),
         }
     }
 }
@@ -95,7 +113,7 @@ impl MultiAppConfig {
             let config = Self {
                 version: 2,
                 apps,
-                mcp: McpConfig::default(),
+                mcp: McpRoot::default(),
             };
 
             // 迁移前备份旧版(v1)配置文件
@@ -157,8 +175,19 @@ impl MultiAppConfig {
         }
     }
 
-    /// 获取 MCP 配置（可变引用）
-    pub fn mcp_mut(&mut self) -> &mut McpConfig {
-        &mut self.mcp
+    /// 获取指定客户端的 MCP 配置（不可变引用）
+    pub fn mcp_for(&self, app: &AppType) -> &McpConfig {
+        match app {
+            AppType::Claude => &self.mcp.claude,
+            AppType::Codex => &self.mcp.codex,
+        }
+    }
+
+    /// 获取指定客户端的 MCP 配置（可变引用）
+    pub fn mcp_for_mut(&mut self, app: &AppType) -> &mut McpConfig {
+        match app {
+            AppType::Claude => &mut self.mcp.claude,
+            AppType::Codex => &mut self.mcp.codex,
+        }
     }
 }