Proportional readiness impact across multiple daily activities + custom workout types

Readiness should account for total daily activity proportionally based on workout intensity/load rather than treating all activities similarly. Multiple activities in one day can have very different recovery costs, and lighter sessions like walks, mobility, or low-intensity mixed work should not affect readiness the same way as a true training session. Requested solution: 1. Add an intensity/load layer to workouts and synced activities so readiness is influenced proportionally, not just by whether activity exists. 2. Allow users to create custom workout types and define how they should be classified in readiness/load calculations. Use case: A user may do a casual walk or jog synced from Apple Health, a light 30-minute "Morning Primer" focused on stretching, mobility, light functional strength, and light cardio, and then a later true strength training session. These should not all impact readiness equally. The walk/jog should have low impact, the Morning Primer should have light impact, and the strength session should have the highest impact. Implementation ideas: - Give each activity a load/intensity classification or score - Aggregate total daily load from multiple sessions - Weight readiness impact by activity type and intensity rather than treating all workouts similarly - Let custom workout types be named by the user and mapped to a default recovery/load profile - Allow custom types to appear in analytics/history without being forced into existing workout categories Example custom type: Name: Morning Primer Typical duration: 30 minutes Components: mobility, stretching, light functional strength, light cardio Default readiness impact: low