feat: AI套图分层方案 + Gemini集成 - 4种图案类型处理 + 正片叠底 + 宽高比 + 模型选择

Co-authored-by: Cursor <cursoragent@cursor.com>

PSMARK代码块/切换主文档.jsx

@@ -0,0 +1,12 @@
+function switchToDocument(docName) {
+    var docs = app.documents;
+    for (var i = 0; i < docs.length; i++) {
+        if (docs[i].name == docName) {
+            app.activeDocument = docs[i];
+            break;
+        }
+    }
+}
+
+// 使用示例
+switchToDocument("xxx.psd");