Slot click now opens an inline editor panel:
- Pick from saved recipes via dropdown (pre-loaded on mount)
- Or type a custom label
- Clear slot button when a slot is already filled
- Save/Cancel with loading state
Add meal type opens a chip picker showing the types not yet active
(breakfast / lunch / snack minus whatever is already on the plan).
Selecting one calls the new PATCH /meal-plans/{plan_id} endpoint.
Backend:
- PATCH /meal-plans/{plan_id} with UpdatePlanRequest(meal_types)
- store.update_meal_plan_types() UPDATE ... RETURNING *
- 409 on IntegrityError in create_plan (already in place)
- upsert_slot: raise 422 immediately if meal_type not in VALID_MEAL_TYPES
- update_prep_task: assert whitelist safety contract after dict comprehension
- CreatePlanRequest: week_start typed as date with must_be_monday validator; str() cast at call site
- PrepTask: frozen=True; build_prep_tasks rewired to use (priority, kwargs) tuples so frozen instances are built with correct sequence_order in one pass (no post-construction mutation)
- Move deferred import json to file-level in meal_plans.py
- Fix test dates: "2026-04-14" was a Tuesday; updated request bodies to "2026-04-13" (Monday)
