[API Node] Add cost indicators on API nodes (#3924)

Co-authored-by: github-actions <github-actions@github.com>
Co-authored-by: Chenlei Hu <huchenlei@proton.me>

src/types/apiNodeTypes.ts

@@ -2,3 +2,23 @@ export interface ApiNodeCost {
   name: string
   cost: number
 }
+
+/**
+ * Information about an API node's cost and pricing details
+ */
+export interface ApiNodeCostData {
+  /** The vendor/company providing the API service (e.g., 'OpenAI', 'Stability') */
+  vendor: string
+  /** The human-readable name of the node as displayed in the UI */
+  nodeName: string
+  /** Parameters that affect pricing (e.g., 'size | quality', 'duration', '-' if none) */
+  pricingParams: string
+  /** The price range per run (e.g., '$0.05', '$0.04 x n', 'dynamic') */
+  pricePerRunRange: string
+  /** Formatted price string for display in the UI */
+  displayPrice: string
+  /** URL to the vendor's pricing documentation page */
+  rateDocumentationUrl?: string
+}
+
+export type ApiNodeCostRecord = Record<string, ApiNodeCostData>