Origin aware animations are broken

### Describe the bug Some components like the popover have `origin-(--transform-origin)` in their default class list. However, Bits UI exposes the calculated origin via `--bits-floating-transform-origin` (as well as `--bits-popover-content-transform-origin`). I am unsure if the user is suppose to provide the `--transform-origin` value or not. ### Reproduction I don't think there's a repro needed for this, can be viewed in the docs itself. ### Logs ```bash ``` ### System Info ```bash System: OS: macOS 26.5.1 CPU: (14) arm64 Apple M4 Pro Memory: 1.98 GB / 48.00 GB Shell: 5.9 - /bin/zsh Binaries: Node: 24.16.0 - /opt/homebrew/opt/node@24/bin/node npm: 11.13.0 - /opt/homebrew/opt/node@24/bin/npm pnpm: 11.5.2 - /Users/gigi/Library/pnpm/bin/pnpm bun: 1.3.14 - /opt/homebrew/bin/bun Deno: 2.8.2 - /opt/homebrew/bin/deno Browsers: Chrome: 149.0.7827.54 Firefox: 151.0.3 Safari: 26.5 ``` ### Severity annoyance