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/vite-env.d.ts

@@ -71,13 +71,18 @@ declare global {
       deleteClaudeMcpServer: (id: string) => Promise<boolean>;
       validateMcpCommand: (cmd: string) => Promise<boolean>;
       // 新：config.json 为 SSOT 的 MCP API
-      getMcpConfig: () => Promise<McpConfigResponse>;
+      getMcpConfig: (app?: AppType) => Promise<McpConfigResponse>;
       upsertMcpServerInConfig: (
+        app: AppType | undefined,
         id: string,
         spec: Record<string, any>,
       ) => Promise<boolean>;
-      deleteMcpServerInConfig: (id: string) => Promise<boolean>;
-      setMcpEnabled: (id: string, enabled: boolean) => Promise<boolean>;
+      deleteMcpServerInConfig: (app: AppType | undefined, id: string) => Promise<boolean>;
+      setMcpEnabled: (
+        app: AppType | undefined,
+        id: string,
+        enabled: boolean,
+      ) => Promise<boolean>;
       syncEnabledMcpToClaude: () => Promise<boolean>;
       importMcpFromClaude: () => Promise<number>;
       testApiEndpoints: (