Time‑Based Social Media Health Warnings

California will force platforms to show daily mental‑health warnings to under‑18 users, and unskippable 30‑second warnings after three hours of use, repeating each hour. This imports cigarette‑style labeling into product UX and ties warning intensity to real‑time usage thresholds. — It tests compelled‑speech limits and could standardize ‘vice‑style’ design rules for digital products nationwide, reshaping platform engagement strategies for minors.