Pull requests

Closes #1. ## What this fixes `roundEmail()` in `hikmat/public/game.html` rendered each Lesson Email slot's `label` and `labelHi` as raw template-literal interpolations into `innerHTML`. `tx()` is a passthrough language switch; it does not

Closes #5. ## What this fixes `hikmat.api.delete_student` is the right-to-erasure entry point for minors' data. It deletes the Student row and Lesson Attempt rows, but it has been silently leaving the corresponding Lesson Doubt rows behind.