Add editor generation model pricing admin UI & API

Introduce centralized model pricing for editor generations: add EditorGenerationPricing types and admin API client methods (GET/POST), backend default config and runtime override support, and server route/handler changes to expose admin editor-generation-pricing. Add an AdminEditorGenerationPricingPage component, styles, route entry, icon, and tests, plus a test for admin routes. Update docs and decision log to describe the pricing contract and management workflow. This enables managing per-model pricing (perGeneration / perSecond, flat or tiered) from the admin panel and exposes runtime pricing to the main site.

apps/admin-web/src/api/adminApiClient.ts

@@ -25,6 +25,7 @@ import type {
   ApiErrorEnvelope,
   ApiMeta,
   ApiSuccessEnvelope,
+  EditorGenerationPricingConfigPayload,
   ProfileInviteCodeAdminListResponse,
   ProfileInviteCodeAdminResponse,
   ProfileRechargeProductConfigAdminListResponse,
@@ -228,6 +229,27 @@ export function upsertAdminPublicWorkInteractions(
   );
 }
 
+export function getAdminEditorGenerationPricing(token: string) {
+  return request<EditorGenerationPricingConfigPayload>(
+    '/admin/api/editor-generation-pricing',
+    { token },
+  );
+}
+
+export function upsertAdminEditorGenerationPricing(
+  token: string,
+  payload: EditorGenerationPricingConfigPayload,
+) {
+  return request<EditorGenerationPricingConfigPayload>(
+    '/admin/api/editor-generation-pricing',
+    {
+      method: 'POST',
+      token,
+      body: payload,
+    },
+  );
+}
+
 export function listAdminWorkVisibility(token: string) {
   return request<AdminWorkVisibilityListResponse>(
     '/admin/api/works/visibility',

apps/admin-web/src/api/adminApiTypes.ts

@@ -210,6 +210,19 @@ export interface AdminUpsertPublicWorkInteractionConfigRequest {
   publicWorkInteractions: PublicWorkInteractionConfigPayload[];
 }
 
+/** 图片画布生成模型泥点定价配置。 */
+export type EditorGenerationPricingUnitPayload = 'perGeneration' | 'perSecond';
+
+export interface EditorGenerationModelPricingPayload {
+  unit: EditorGenerationPricingUnitPayload;
+  price?: number;
+  prices?: Record<string, number>;
+}
+
+export interface EditorGenerationPricingConfigPayload {
+  models: Record<string, EditorGenerationModelPricingPayload>;
+}
+
 /** 后台统一创作工作台契约表单的传输结构。 */
 export interface UnifiedCreationSpecPayload {
   playId: string;