fix(build): make build-web works; gofmt all Go files

internal/dm/handlers.go

@@ -17,8 +17,8 @@ import (
 
 // Handler handles direct-message conversations.
 type Handler struct {
-	db   *sql.DB
-	hub  *gateway.Hub
+	db     *sql.DB
+	hub    *gateway.Hub
 	logger *slog.Logger
 }
 
@@ -256,14 +256,14 @@ func (h *Handler) buildResponse(ctx context.Context, convID string) (conversatio
 }
 
 type messageResponse struct {
-	ID           string  `json:"id"`
-	ConversationID string `json:"conversation_id"`
-	AuthorID     string  `json:"author_id"`
-	AuthorName   string  `json:"author_username"`
-	DisplayName  *string `json:"author_display_name"`
-	Content      string  `json:"content"`
-	EditedAt     *string `json:"edited_at"`
-	CreatedAt    string  `json:"created_at"`
+	ID             string  `json:"id"`
+	ConversationID string  `json:"conversation_id"`
+	AuthorID       string  `json:"author_id"`
+	AuthorName     string  `json:"author_username"`
+	DisplayName    *string `json:"author_display_name"`
+	Content        string  `json:"content"`
+	EditedAt       *string `json:"edited_at"`
+	CreatedAt      string  `json:"created_at"`
 }
 
 // ListMessages lists messages in a conversation.