063aa67615
- Exercise number (UF#): optional field on exercises, displayed in cards, training, and sets - Import training plan numbers via migration 005 (UPDATE by name) - Exercise images: JPG upload with multi-image support per exercise (migration 006) - Version endpoint (GET /api/v1/version) with ldflags injection in Makefile and Dockerfile - Version displayed on settings page - Session resume: GET /api/v1/sessions/active endpoint, auto-resume on training page load - Block new session while one is active (409 Conflict) - e1RM sparkline chart per exercise during training (Epley formula) - Fix CORS: add X-User-ID to allowed headers Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>