fix(MCPSettings): MCP server environment variables parsing error

If there is one or more equal (=) sign in value part, all would be lost

src/renderer/src/pages/settings/MCPSettings.tsx

@@ -96,7 +96,8 @@ const MCPSettings: FC = () => {
         if (values.env) {
           values.env.split('\n').forEach((line) => {
             if (line.trim()) {
-              const [key, value] = line.split('=')
+              const [key, ...chunks] = line.split('=')
+              const value = chunks.join('=')
               if (key && value) {
                 env[key.trim()] = value.trim()
               }