Agent: catalog and garden tools, and a ready date on every describe group

- update_seed_lot / delete_seed_lot: correct or drop a recorded purchase
  ("it was three packets, not two"); the plant a lot is for stays fixed.
- delete_plant: remove a duplicate from the user's catalog. The service
  already refuses while plantings (past seasons included) or a lot reference
  it; the tool turns that sentinel into words the model can pass on, and
  tells it not to clear those references to get its way.
- create_garden: a new place, with the service's defaults; the prompt says a
  plan is still a copy_garden.
- describe_garden groups carry readyAround — planting date plus days to
  maturity for the plops still in the ground — so "what can I pick this
  week?" is a lookup rather than arithmetic the model got wrong live.

Co-Authored-By: Claude Fable 5 <[email protected]>

web/src/lib/agent.ts

@@ -122,8 +122,12 @@ const TOOL_LABELS: Record<string, string> = {
   undo_change: 'Undoing a change',
   list_seed_lots: 'Checking your seed',
   record_seed_lot: 'Recording seed',
+  update_seed_lot: 'Correcting a seed lot',
+  delete_seed_lot: 'Deleting a seed lot',
+  delete_plant: 'Removing a plant from your catalog',
   copy_garden: 'Copying the garden',
   update_garden: 'Changing the garden',
+  create_garden: 'Starting a garden',
 }
 
 export function describeStep(step: AgentStep): string {