Preserve QOutlook priority headers in EML

src/io/outlookMail.test.ts

@@ -180,6 +180,9 @@ describe("outlookMail helpers", () => {
       "Message-ID: <message-1@example.com>",
       "In-Reply-To: <parent@example.com>",
       "References: <root@example.com> <parent@example.com>",
+      "Importance: high",
+      "X-Priority: 1",
+      "Priority: urgent",
       "Subject: =?UTF-8?B?0JzRg9C70YzRgtC40L/QsNGA0YI=?=",
       "Date: Mon, 01 Jun 2026 10:00:00 +0300",
       'Content-Type: multipart/alternative; boundary="alt"',
@@ -208,6 +211,9 @@ describe("outlookMail helpers", () => {
     expect(imported.messageId).toBe("<message-1@example.com>");
     expect(imported.inReplyTo).toBe("<parent@example.com>");
     expect(imported.references).toBe("<root@example.com> <parent@example.com>");
+    expect(imported.importance).toBe("high");
+    expect(imported.xPriority).toBe("1");
+    expect(imported.priority).toBe("urgent");
   });
 
   it("импортирует multipart/mixed EML с вложением", async () => {
@@ -262,6 +268,9 @@ describe("outlookMail helpers", () => {
           "Message-ID: <msg-1@example.com>",
           "In-Reply-To: <msg-parent@example.com>",
           "References: <msg-root@example.com> <msg-parent@example.com>",
+          "Importance: low",
+          "X-Priority: 5",
+          "Priority: non-urgent",
           "From: sender@example.com"
         ].join("\r\n"),
         bodyHtml: "<p>HTML&nbsp;текст</p>",
@@ -285,6 +294,9 @@ describe("outlookMail helpers", () => {
       messageId: "<msg-1@example.com>",
       inReplyTo: "<msg-parent@example.com>",
       references: "<msg-root@example.com> <msg-parent@example.com>",
+      importance: "low",
+      xPriority: "5",
+      priority: "non-urgent",
       subject: "MSG отчет",
       body: "HTML текст",
       time: "Mon, 01 Jun 2026 10:00:00 GMT",
@@ -317,6 +329,9 @@ describe("outlookMail helpers", () => {
       messageId: "<message-1@example.com>",
       inReplyTo: "<parent@example.com>",
       references: "<root@example.com> <parent@example.com>",
+      importance: "high",
+      xPriority: "1",
+      priority: "urgent",
       subject: "Тема",
       body: "Текст",
       time: "Mon, 01 Jan 2024 10:00:00 +0000",
@@ -333,6 +348,9 @@ describe("outlookMail helpers", () => {
     expect(eml).toContain("Message-ID: <message-1@example.com>");
     expect(eml).toContain("In-Reply-To: <parent@example.com>");
     expect(eml).toContain("References: <root@example.com> <parent@example.com>");
+    expect(eml).toContain("Importance: high");
+    expect(eml).toContain("X-Priority: 1");
+    expect(eml).toContain("Priority: urgent");
     expect(eml).toContain("Subject: =?UTF-8?B?");
     expect(eml.endsWith("Текст")).toBe(true);
   });
@@ -349,6 +367,9 @@ describe("outlookMail helpers", () => {
       messageId: "<message-1@example.com>",
       inReplyTo: "<parent@example.com>",
       references: "<root@example.com> <parent@example.com>",
+      importance: "high",
+      xPriority: "1",
+      priority: "urgent",
       subject: "Тема",
       body: "Текст",
       time: "Mon, 01 Jan 2024 10:00:00 +0000",
@@ -377,6 +398,9 @@ describe("outlookMail helpers", () => {
     expect(eml).toContain("Message-ID: <message-1@example.com>");
     expect(eml).toContain("In-Reply-To: <parent@example.com>");
     expect(eml).toContain("References: <root@example.com> <parent@example.com>");
+    expect(eml).toContain("Importance: high");
+    expect(eml).toContain("X-Priority: 1");
+    expect(eml).toContain("Priority: urgent");
     expect(eml).toContain("filename*=utf-8''%D0%BE%D1%82%D1%87%D0%B5%D1%82%2E%74%78%74");
     expect(extractMessageBody(parsed.headers, parsed.body)).toBe("Текст");
     expect(attachments[0]).toMatchObject({