Include mailbox_id in mail +triage output for public mailbox support

shortcuts/mail/mail_triage.go

@@ -267,7 +267,11 @@ var MailTriage = common.Shortcut{
 
 		switch outFormat {
 		case "json", "data":
+			for i := range messages {
+				messages[i]["mailbox_id"] = mailbox
+			}
 			outData := map[string]interface{}{
+				"mailbox_id": mailbox,
 				"messages":   messages,
 				"count":      len(messages),
 				"has_more":   hasMore,
@@ -286,6 +290,7 @@ var MailTriage = common.Shortcut{
 					"from":       sanitizeForTerminal(strVal(msg["from"])),
 					"subject":    sanitizeForTerminal(strVal(msg["subject"])),
 					"message_id": msg["message_id"],
+					"mailbox_id": mailbox,
 				}
 				if showLabels {
 					row["labels"] = msg["labels"]
@@ -306,7 +311,7 @@ var MailTriage = common.Shortcut{
 				hint.WriteString(" --page-token " + shellQuote(nextPageToken))
 				fmt.Fprintln(runtime.IO().ErrOut, hint.String())
 			}
-			fmt.Fprintln(runtime.IO().ErrOut, "tip: use mail +message --message-id <id> to read full content")
+			fmt.Fprintf(runtime.IO().ErrOut, "tip: use mail +message --mailbox %s --message-id <id> to read full content\n", mailbox)
 		}
 		return nil
 	},

shortcuts/mail/mail_triage_test.go

@@ -1405,3 +1405,56 @@ func TestParseTriagePageTokenInvalidPrefix(t *testing.T) {
 }
 
 func boolPtr(v bool) *bool { return &v }
+
+
+// --- mailbox_id in output ---
+
+func TestBuildTriageMessageMetaPreservesFields(t *testing.T) {
+	msg := map[string]interface{}{
+		"message_id": "msg_001",
+		"subject":    "Test subject",
+		"folder_id":  "INBOX",
+		"thread_id":  "thread_001",
+		"head_from": map[string]interface{}{
+			"name":         "Alice",
+			"mail_address": "alice@example.com",
+		},
+	}
+	got := buildTriageMessageMeta(msg, "msg_001")
+	if got["message_id"] != "msg_001" {
+		t.Fatalf("message_id mismatch: %v", got["message_id"])
+	}
+	if got["subject"] != "Test subject" {
+		t.Fatalf("subject mismatch: %v", got["subject"])
+	}
+	if got["thread_id"] != "thread_001" {
+		t.Fatalf("thread_id mismatch: %v", got["thread_id"])
+	}
+}
+
+func TestBuildTriageMessagesFromSearchItemsIncludesAllFields(t *testing.T) {
+	raw := []interface{}{
+		map[string]interface{}{
+			"meta_data": map[string]interface{}{
+				"message_biz_id": "biz_msg_100",
+				"title":          "Search hit",
+				"thread_id":      "thread_100",
+				"create_time":    "2026-04-01T12:00:00+08:00",
+				"from": map[string]interface{}{
+					"name":         "Bob",
+					"mail_address": "bob@example.com",
+				},
+			},
+		},
+	}
+	got := buildTriageMessagesFromSearchItems(raw)
+	if len(got) != 1 {
+		t.Fatalf("expected 1 message, got %d", len(got))
+	}
+	if got[0]["message_id"] != "biz_msg_100" {
+		t.Fatalf("message_id mismatch: %v", got[0]["message_id"])
+	}
+	if got[0]["subject"] != "Search hit" {
+		t.Fatalf("subject mismatch: %v", got[0]["subject"])
+	}
+}