New PR display on lift pages
- Added a PR display component on the big four lift pages
- Browse PRs by rep range (1RM, 3RM, 5RM, etc.) in an overview and detail view
- Video links for PRs: YouTube and Google Photos URLs show thumbnails with play buttons
- Strength rating badges on PR cards (Physically Active, Beginner, Intermediate, Advanced, Elite) using strength standards and athlete bio
- On mobile/tablet, only key rep ranges (1RM, 3RM, 5RM, 10RM) are shown to keep the layout simple
