fix: remove light background from MCP NpxUv install alerts (#11372)

- Remove 'banner' prop from Alert components in InstallNpxUv
- Set SettingContainer background to 'inherit' in MCP settings
- Fixes the light background color issue in NpxUv interface

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>

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

@@ -109,7 +109,6 @@ const InstallNpxUv: FC<Props> = ({ mini = false }) => {
     <Container>
       <Alert
         type={isUvInstalled ? 'success' : 'warning'}
-        banner
         style={{ borderRadius: 'var(--list-item-border-radius)' }}
         description={
           <VStack>
@@ -140,7 +139,6 @@ const InstallNpxUv: FC<Props> = ({ mini = false }) => {
       />
       <Alert
         type={isBunInstalled ? 'success' : 'warning'}
-        banner
         style={{ borderRadius: 'var(--list-item-border-radius)' }}
         description={
           <VStack>

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

@@ -140,7 +140,7 @@ const MCPSettings: FC = () => {
             <Route
               path="mcp-install"
               element={
-                <SettingContainer theme={theme}>
+                <SettingContainer style={{ backgroundColor: 'inherit' }}>
                   <InstallNpxUv />
                 </SettingContainer>
               }