fix export pdf issue

Author: petertzy

backend/routers/export.py

@@ -123,14 +123,23 @@ def get(self, *_):
 @router.post("/pdf")
 def export_pdf(payload: ExportPayload):
     """Export Markdown to PDF via WeasyPrint and return the output file path."""
+    from backend.renderer import render_markdown
     from markdown_reader.plugins.pdf_exporter import export_markdown_to_pdf
 
+    html = render_markdown(
+        payload.content,
+        base_dir=payload.base_dir,
+        dark_mode=payload.dark_mode,
+        font_family=payload.font_family,
+        font_size=payload.font_size,
+    )
+
     out_path = _make_output_path(payload.output_path, ".pdf")
     parent = os.path.dirname(out_path)
     if parent:
         os.makedirs(parent, exist_ok=True)
     try:
-        export_markdown_to_pdf(payload.content, out_path, base_dir=payload.base_dir)
+        export_markdown_to_pdf(html, out_path, base_url=payload.base_dir)
     except Exception as exc:
         raise HTTPException(status_code=500, detail=str(exc))
     return {"path": out_path}

frontend/src/app/page.tsx

@@ -91,24 +91,30 @@ export default function HomePage() {
 
   const handleExport = async (format: "html" | "pdf" | "docx") => {
     try {
-      // For HTML, prompt user to choose save location
       let outputPath: string | undefined;
-      if (format === "html") {
-        try {
-          const { save } = await import("@tauri-apps/plugin-dialog");
-          const selected = await save({
-            defaultPath: `${editor.activeTab.label.replace(/\.[^/.]+$/, "") || "document"}.html`,
-            filters: [{ name: "HTML files", extensions: ["html"] }],
-          });
-          if (!selected) return; // User cancelled
-          outputPath = Array.isArray(selected) ? selected[0] : selected;
-        } catch {
-          // In browser mode, fallback to download (no save dialog)
-          alert("HTML export requires Tauri desktop app for save dialog. Use download instead.");
+      try {
+        const { save } = await import("@tauri-apps/plugin-dialog");
+        const extension = format === "pdf" ? "pdf" : format === "docx" ? "docx" : "html";
+        const defaultName = `${editor.activeTab.label.replace(/\.[^/.]+$/, "") || "document"}.${extension}`;
+        const filters = [
+          { name: "HTML files", extensions: ["html"] },
+          { name: "PDF files", extensions: ["pdf"] },
+          { name: "Word files", extensions: ["docx"] },
+        ];
+        const selected = await save({
+          defaultPath: defaultName,
+          filters: [{ name: `${extension.toUpperCase()} files`, extensions: [extension] }],
+        });
+        if (!selected) return;
+        outputPath = Array.isArray(selected) ? selected[0] : selected;
+      } catch {
+        if (format === "html") {
+          alert("HTML export requires Tauri desktop app for save dialog. Use the browser download path instead.");
           return;
         }
+        alert("PDF/DOCX export requires Tauri desktop app for save dialog.");
+        return;
       }
-      // For PDF/DOCX, export directly (backend handles temp file for now)
       const result = await editor.exportAs(format, outputPath);
       if (result) {
         alert(`Exported to:\n${result.path}`);