BD2ModManager v 4.1.1 Edit v1.0

Revert version to 4.1.1 and overhaul NPC page

- Roll back version stamp to 4.1.1 across package.json, Cargo.toml/lock, and tauri.conf.json
- Rename NPC feature files, route, i18n namespace, sidebar value, and public asset folder for consistency
- Fix stray white borders by replacing invalid Tailwind utility classes with valid design tokens
- Fix header mod count to match the NPC list actually rendered on screen
- Map NPC id 0033 to its standing icon
- Redesign NPC grid item, list row, and modal to mirror the Characters page using the shared Image component