code review fixes

ui/src/app/app.sass

@@ -1,29 +1,7 @@
-.button-toggle-theme:focus, .button-toggle-theme:active
-    box-shadow: none
-    outline: 0px
-
 .add-url-box
     max-width: 960px
     margin: 4rem auto
 
-.add-url-component
-    margin: 0.5rem auto
-
-.add-url-group
-    width: 100%
-
-button.add-url
-    width: 100%
-
-.folder-dropdown-menu
-    width: 500px
-    max-width: calc(100vw - 3rem)
-
-.folder-dropdown-menu .input-group
-    display: flex
-    padding-left: 5px
-    padding-right: 5px
-
 .metube-section-header
     font-size: 1.8rem
     font-weight: 300
@@ -66,39 +44,11 @@ td
     width: 12rem
     margin-left: auto
 
-.batch-panel
-  margin-top: 15px
-  border: 1px solid #ccc
-  border-radius: 8px
-  padding: 15px
-  background-color: #fff
-  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1)
-
-.batch-panel-header
-  border-bottom: 1px solid #eee
-  padding-bottom: 8px
-  margin-bottom: 15px
-  h4
-    font-size: 1.5rem
-    margin: 0
-
-.batch-panel-body
-  textarea.form-control
-    resize: vertical
-
-.batch-status
-  font-size: 0.9rem
-  color: #555
-
-.d-flex.my-3
-  margin-top: 1rem
-  margin-bottom: 1rem
-
 .modal.fade.show
   background-color: rgba(0, 0, 0, 0.5)
 
 .modal-header
-  border-bottom: 1px solid #eee
+  border-bottom: 1px solid var(--bs-border-color)
 
 .modal-body
   textarea.form-control
@@ -119,21 +69,6 @@ td
 .add-cancel-btn
   min-width: 3.25rem
 
-::ng-deep .ng-select
-    flex: 1
-    .ng-select-container
-        min-height: 38px
-    .ng-value
-        white-space: nowrap
-        overflow: visible
-    .ng-dropdown-panel
-        .ng-dropdown-panel-items
-            max-height: 300px
-            .ng-option
-                white-space: nowrap
-                overflow: visible
-                text-overflow: ellipsis
-
 :host
   display: flex
   flex-direction: column