feat(md-print): add timestamp footer option

src/components/md-print/config.test.ts

@@ -12,6 +12,7 @@ describe("normalizePrintConfig", () => {
       gap: "-5",
       font: "20",
       pageNumbers: "false",
+      timestamp: "true",
       cutMarks: "no",
     });
 
@@ -20,6 +21,7 @@ describe("normalizePrintConfig", () => {
     expect(config.gap).toBe(0);
     expect(config.font).toBe(6);
     expect(config.pageNumbers).toBe(false);
+    expect(config.timestamp).toBe(true);
     expect(config.cutMarks).toBe(false);
   });
 
@@ -41,6 +43,7 @@ describe("normalizePrintConfig", () => {
       font: 3,
       title: "规则书",
       pageNumbers: true,
+      timestamp: true,
       cutMarks: false,
     });
 
@@ -51,7 +54,13 @@ describe("normalizePrintConfig", () => {
       font: 3,
       title: "规则书",
       pageNumbers: true,
+      timestamp: true,
       cutMarks: false,
     });
   });
+
+  test("timestamp defaults to false", () => {
+    expect(normalizePrintConfig().timestamp).toBe(false);
+    expect(normalizePrintConfig({ timestamp: "false" }).timestamp).toBe(false);
+  });
 });