Chat edit with WS notification

- PUT /messages/:msgId now returns {ok, edited:true}
- WS pushes 'message_edited' event to both chat members
- Mobile UI: show 'ред.' marker when edited=true
- Audit log: message.edit action
- Repo: GetMessage helper for fetching after edit

internal/chat/repo.go

@@ -199,6 +199,23 @@ func (r *Repo) EditMessage(ctx context.Context, msgID, senderID uuid.UUID, newBo
 	return nil
 }
 
+func (r *Repo) GetMessage(ctx context.Context, msgID uuid.UUID) (*Message, error) {
+	m := &Message{}
+	err := r.pool.QueryRow(ctx, `
+		SELECT id, chat_id, sender_id, COALESCE(body, ''), COALESCE(photo_url, ''),
+		       read, edited, deleted, created_at, updated_at
+		FROM messages WHERE id=$1`, msgID,
+	).Scan(&m.ID, &m.ChatID, &m.SenderID, &m.Body, &m.PhotoURL,
+		&m.Read, &m.Edited, &m.Deleted, &m.CreatedAt, &m.UpdatedAt)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
 func (r *Repo) DeleteMessage(ctx context.Context, msgID, senderID uuid.UUID) error {
 	res, err := r.pool.Exec(ctx, `
 		UPDATE messages SET deleted=TRUE, body=NULL, photo_url=NULL, updated_at=NOW()

internal/handlers/chat.go

@@ -220,7 +220,37 @@ func (h *ChatHandlers) EditMessage(c *fiber.Ctx) error {
 	if err := h.Chat.EditMessage(c.UserContext(), msgID, me, body); err != nil {
 		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": err.Error()})
 	}
-	return c.JSON(fiber.Map{"ok": true})
+
+	_ = h.Audit.Log(c.UserContext(), &audit.Event{
+		UserID: &me, Action: "message.edit", TargetType: "message", TargetID: msgID.String(),
+		IP: c.IP(), UserAgent: c.Get("User-Agent"),
+	})
+
+	// Push WS — обоим участникам чата
+	m, err := h.Chat.GetMessage(c.UserContext(), msgID)
+	if err == nil && m != nil {
+		ch, _ := h.Chat.GetByID(c.UserContext(), m.ChatID)
+		if ch != nil {
+			other := ch.UserA
+			if other == me {
+				other = ch.UserB
+			}
+			for _, uid := range []uuid.UUID{me, other} {
+				h.Hub.SendTo(uid, ws.Outgoing{
+					Type: "message_edited",
+					Payload: fiber.Map{
+						"id":         m.ID,
+						"chat_id":    m.ChatID,
+						"body":       m.Body,
+						"edited":     m.Edited,
+						"updated_at": m.UpdatedAt,
+					},
+					Time: time.Now(),
+				})
+			}
+		}
+	}
+	return c.JSON(fiber.Map{"ok": true, "edited": true})
 }
 
 func (h *ChatHandlers) DeleteMessage(c *fiber.Ctx) error {