fix: update response types to match actual API contract

Backend Brooke confirmed the actual API response structure uses "definitions"
not "created_definitions". Also added missing preset and pattern fields to
GenerateSlotDefinitionsResponse.

Changes:
- GenerateSlotDefinitionsResponse: added preset and pattern fields
- GenerateSlotDefinitionsResponse: renamed created_definitions → definitions
- CloneSlotDefinitionResponse: renamed created_definitions → definitions

This matches the confirmed API contract from BUILD 348.

src/types/slot-definitions.ts

@@ -172,7 +172,9 @@ export interface GenerateSlotDefinitionsResponse {
   data: {
     created_count: number;
     skipped_count?: number;
-    created_definitions: SlotDefinition[];
+    preset: SlotDefinitionPreset;
+    pattern: PresetPattern;
+    definitions: SlotDefinition[];
     skipped?: SkippedSlot[];
   };
 }
@@ -195,7 +197,7 @@ export interface CloneSlotDefinitionResponse {
   data: {
     created_count: number;
     skipped_count?: number;
-    created_definitions: SlotDefinition[];
+    definitions: SlotDefinition[];
     skipped?: SkippedSlot[];
   };
 }