Test passed: messages received in order

internal/mailbox/message.go

@@ -2,6 +2,7 @@ package mailbox
 
 import (
 	"encoding/json"
+	"fmt"
 	"time"
 )
 
@@ -59,11 +60,5 @@ func FromJSON(data []byte) (*Message, error) {
 }
 
 func generateID() string {
-	// Simple ID generation - reuse existing ID generation logic
-	const chars = "abcdefghijklmnopqrstuvwxyz0123456789"
-	b := make([]byte, 8)
-	for i := range b {
-		b[i] = chars[time.Now().UnixNano()%int64(len(chars))]
-	}
-	return "msg-" + string(b)
+	return fmt.Sprintf("msg-%d", time.Now().Unix())
 }

internal/p9/server.go

@@ -14,6 +14,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 	"sync"
@@ -816,6 +817,11 @@ func (s *Server) readDir(path string, offset uint64, count uint32) []byte {
 				messages = mailMgr.GetCompleted("user")
 			}
 			
+			// Sort messages by ID (which is now timestamp-based)
+			sort.Slice(messages, func(i, j int) bool {
+				return messages[i].ID < messages[j].ID
+			})
+			
 			for _, msg := range messages {
 				data, _ := msg.ToJSON()
 				dirs = append(dirs, plan9.Dir{
@@ -891,6 +897,11 @@ func (s *Server) readDir(path string, offset uint64, count uint32) []byte {
 			messages = mailMgr.GetCompleted(sessID)
 		}
 		
+		// Sort messages by ID (which is now timestamp-based)
+		sort.Slice(messages, func(i, j int) bool {
+			return messages[i].ID < messages[j].ID
+		})
+		
 		for _, msg := range messages {
 			data, _ := msg.ToJSON()
 			dirs = append(dirs, plan9.Dir{