Unify table-management canon and aqua icon system

kit/patterns/controls-selection/contract.md

@@ -1,5 +1,12 @@
 # Contract: Controls + Selection
 
+## Shared Base
+
+- This pattern inherits the shared `table-management` contract:
+  `kit/patterns/table-management/contract.md`.
+- Reuse shared toolbar/table/icon geometry from the base contract first, then define only
+  controls-specific additions below.
+
 ## Buttons
 
 - Use a small stable button taxonomy: `primary`, `secondary`, `ghost`, `danger`, `disabled`.