Study-28k-system-prompts

fix: polish research page — minimal design, fix Hashnode URL

- Fixed URL to blog.kaelux.dev/page/ai-format-wars
- Marked Study C and 170 Prompts as 'Coming soon'
- Simplified card design to match site's minimalist aesthetic

charts-study-E

Research-chart

chore(deps): Bump next from 15.5.10 to 15.5.14 in /promptrefiner-ui (…