iCloud Drive writes now flow through a persistent WriteBacklog sidecar (drained with backoff, flushed on backgrounding, wiped with the cache on account change), so a save can never be lost to a transient coordinator error. A status banner on the workout list surfaces stuck syncing. Also: the split picker gains a Recent section with day labels, split rows fold SplitItem into SplitListView, and list rows dim the multiply sign in sets-by-reps. Claude-Session: https://claude.ai/code/session_01HJDQQDA9QdP8zByg43H5v3