Modify the Logic for "Export as PDF"

ReportEngine/renderers/__init__.py

@@ -1,9 +1,31 @@
 """
 Report Engine渲染器集合。
 
-目前仅提供 HTMLRenderer，未来可扩展为PDF/Markdown等输出。
+提供 HTMLRenderer 和 PDFRenderer，支持HTML和PDF输出。
 """
 
 from .html_renderer import HTMLRenderer
+from .pdf_renderer import PDFRenderer
+from .pdf_layout_optimizer import (
+    PDFLayoutOptimizer,
+    PDFLayoutConfig,
+    PageLayout,
+    KPICardLayout,
+    CalloutLayout,
+    TableLayout,
+    ChartLayout,
+    GridLayout,
+)
 
-__all__ = ["HTMLRenderer"]
+__all__ = [
+    "HTMLRenderer",
+    "PDFRenderer",
+    "PDFLayoutOptimizer",
+    "PDFLayoutConfig",
+    "PageLayout",
+    "KPICardLayout",
+    "CalloutLayout",
+    "TableLayout",
+    "ChartLayout",
+    "GridLayout",
+]