Refactor tests, documentation, and component code for consistent formatting and improved readability

- Reformatted test files (`RegistrationActivityChart.test.tsx`, `DemoCredentialsModal.test.tsx`) for indentation consistency.
- Reduced inline style verbosity across components and docs (`DemoModeBanner`, `CodeBlock`, `MarkdownContent`).
- Enhanced Markdown documentation (`sync-msw-with-openapi.md`, `MSW_AUTO_GENERATION.md`) with spacing updates for improved clarity.
- Updated MSW configuration to simplify locale route handling in `browser.ts`.

frontend/src/components/demo/DemoModeBanner.tsx

@@ -11,11 +11,7 @@ import { useState } from 'react';
 import config from '@/config/app.config';
 import { Sparkles } from 'lucide-react';
 import { Badge } from '@/components/ui/badge';
-import {
-  Popover,
-  PopoverContent,
-  PopoverTrigger,
-} from '@/components/ui/popover';
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
 
 export function DemoModeBanner() {
   // Only show in demo mode