按后台配置扣除创作泥点

前端创作表单泥点预校验改为读取入口契约配置

拼图和抓大鹅初始生成后端扣费改为解析后台配置

汪汪声浪初始三图生成按入口总成本拆分扣费

创作工作台按钮和确认弹窗展示后台配置泥点成本

补充泥点扣费回归测试并同步文档与共享记忆

src/services/bark-battle-creation/barkBattleCreationClient.test.ts

@@ -172,6 +172,7 @@ describe('barkBattleCreationClient', () => {
         body: JSON.stringify({
           slot: 'player-character',
           draftId: 'draft-1',
+          billingPurpose: null,
           config: {
             title: '汪汪冠军杯',
             description: '',
@@ -224,5 +225,16 @@ describe('barkBattleCreationClient', () => {
       'opponent-character': '泥点不足，本次需要 1 泥点，当前 0 泥点。',
       'ui-background': '场景图片生成失败：上游超时',
     });
+    expect(requestJsonMock).toHaveBeenNthCalledWith(
+      1,
+      '/api/creation/bark-battle/images/generate',
+      expect.objectContaining({
+        body: expect.stringContaining(
+          '"billingPurpose":"initial_draft_generation"',
+        ),
+      }),
+      '生成汪汪声浪素材失败',
+      expect.anything(),
+    );
   });
 });

src/services/bark-battle-creation/barkBattleCreationClient.ts

@@ -376,10 +376,12 @@ export function regenerateBarkBattleImageAsset(payload: {
   slot: BarkBattleAssetSlot;
   config: BarkBattleConfigEditorPayload;
   draftId?: string | null;
+  billingPurpose?: BarkBattleImageAssetGenerateRequest['billingPurpose'];
 }): Promise<BarkBattleGeneratedImageAsset> {
   const request: BarkBattleImageAssetGenerateRequest = {
     slot: payload.slot,
     draftId: payload.draftId ?? null,
+    billingPurpose: payload.billingPurpose ?? null,
     config: payload.config,
   };
   return requestJson<BarkBattleGeneratedImageAsset>(
@@ -418,6 +420,7 @@ export async function generateAllBarkBattleImageAssets(payload: {
           slot,
           config: payload.config,
           draftId: payload.draftId,
+          billingPurpose: 'initial_draft_generation',
         }),
         slot,
       )