refactor(mcp): improve data structure with metadata/spec separation

- Separate MCP server metadata from connection spec for cleaner architecture
- Add comprehensive server entry fields: name, description, tags, homepage, docs
- Remove legacy format compatibility logic from extract_server_spec
- Implement data validation and filtering in get_servers_snapshot_for
- Add strict id consistency check in upsert_in_config_for
- Enhance import logic with defensive programming for corrupted data
- Simplify frontend by removing normalization logic (moved to backend)
- Improve error messages with contextual information
- Add comprehensive i18n support for new metadata fields

src/components/mcp/McpWizardModal.tsx

@@ -1,7 +1,7 @@
 import React, { useState } from "react";
 import { useTranslation } from "react-i18next";
 import { X, Save } from "lucide-react";
-import { McpServer } from "../../types";
+import { McpServerSpec } from "../../types";
 import { isLinux } from "../../lib/platform";
 
 interface McpWizardModalProps {
@@ -86,7 +86,7 @@ const McpWizardModal: React.FC<McpWizardModalProps> = ({
 
   // 生成预览 JSON
   const generatePreview = (): string => {
-    const config: McpServer = {
+    const config: McpServerSpec = {
       type: wizardType,
     };