feat: add changelog entry for PDF export error fix

Author: JOYCEQL

src/lib/getChangelog.ts

@@ -8,6 +8,15 @@ export interface TimelineEntry {
 
 export function getChangelog(): TimelineEntry[] {
   return [
+    {
+      date: "2025-03-15",
+      sections: [
+        {
+          title: "修复",
+          items: ["修复多余分割线引起的导出PDF 400 错误"],
+        },
+      ],
+    },
     {
       date: "2025-03-07",
       sections: [