feat(video-from-script): 将可灵生图切换为多图参考风格接口

将 Kling 图像生成器从单图生图 API 升级为多图参考生图端点，支持风格参考图片功能，并更新降级链顺序

.claude/skills/video-from-script/scripts/pipeline.js

@@ -221,7 +221,7 @@ async function phaseImages(manifest, manifestPath, options) {
         const { generate: klingGen } = require('./kling-image-generator')
         const klingOpts = { outputDir: imagesDir, aspectRatio: ratio }
         if (refs.urls.length > 0) {
-          klingOpts.referenceImageUrl = refs.urls[0]
+          klingOpts.styleImageUrl = refs.urls[0]
         }
         log('images', `[${idx}/${items.length}] 可灵生图: ${item.imagePrompt.substring(0, 60)}...`)
         result = await klingGen(item.imagePrompt, klingOpts)
@@ -272,7 +272,7 @@ async function phaseImages(manifest, manifestPath, options) {
             const { generate: klingGen } = require('./kling-image-generator')
             lastResult = await klingGen(item.lastFramePrompt, {
               outputDir: imagesDir,
-              referenceImageUrl: item.url || '',
+              styleImageUrl: item.url || '',
               aspectRatio: ratio,
             })
           }