chore: comprehensive codebase cleanup and deduplication

- Consolidate duplicate LoadingButton components
  - Remove components/form/LoadingButton.tsx (manual Spinner handling)
  - Standardize on components/ui/LoadingButton.tsx (Chakra UI native)
  - Update all imports and prop names (isLoading → loading)

- Remove unused UI components not applicable to network monitoring
  - Remove prose.tsx (content formatting, not needed)
  - Remove blockquote.tsx (quote styling, not needed)
  - Remove qr-code.tsx (QR generation, not needed)

- Keep comprehensive UI component library intact
  - Preserved 47+ UI components for future extensibility
  - Design system provides consistent styling foundation

Clean code, better maintainability, no functionality impact.

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

Co-Authored-By: Claude <[email protected]>

Author: hemanandr