feat: 完善 Mermaid 配置与预览缩放

apps/web/src/mermaid-config.ts

@@ -1,3 +1,4 @@
+import type { MermaidExportConfig } from "@md-to-pdf/core";
 import type { MermaidConfig } from "mermaid";
 
 export const MERMAID_SECURE_CONFIG_KEYS = [
@@ -10,13 +11,16 @@ export const MERMAID_SECURE_CONFIG_KEYS = [
   "themeCSS"
 ];
 
-export function createMermaidSiteConfig(): MermaidConfig {
+export function createMermaidSiteConfig(
+  config: MermaidExportConfig
+): MermaidConfig {
   return {
     startOnLoad: false,
     securityLevel: "strict",
-    theme: "default",
-    look: "classic",
-    fontFamily: "Segoe UI, Microsoft YaHei, sans-serif",
+    layout: config.layout,
+    theme: config.theme,
+    look: config.look,
+    fontFamily: config.fontFamily,
     flowchart: {
       wrappingWidth: 320
     },