refactor: plugin icon and manual install button

web/src/plugin/PluginStore/ManualInstall.tsx

@@ -37,6 +37,7 @@ export const ManualInstall: React.FC = React.memo(() => {
         <Button
           loading={loading}
           disabled={invalid}
+          type="primary"
           onClick={handleInstallPlugin}
         >
           {t('确认')}

web/src/plugin/utils.ts

@@ -17,6 +17,7 @@ export function parsePluginManifest(json: string): PluginManifest {
       label: { type: 'string' },
       name: { type: 'string' },
       url: { type: 'string' },
+      icon: { type: 'string' },
       version: { type: 'string' },
       author: { type: 'string' },
       description: { type: 'string' },