feat: replace AI provider modals with dedicated edit pages

src/pages/AuthFilesOAuthExcludedEditPage.module.scss

@@ -1,86 +1,6 @@
 @use '../styles/variables' as *;
 @use '../styles/mixins' as *;
 
-.container {
-  display: flex;
-  flex-direction: column;
-  gap: $spacing-lg;
-  min-height: 0;
-}
-
-.topBar {
-  position: sticky;
-  top: 0;
-  z-index: 5;
-  display: grid;
-  grid-template-columns: 1fr auto 1fr;
-  align-items: center;
-  gap: $spacing-md;
-  padding: $spacing-sm $spacing-md;
-  background: var(--bg-secondary);
-  border-bottom: 1px solid var(--border-color);
-  min-height: 44px;
-}
-
-.topBarTitle {
-  min-width: 0;
-  text-align: center;
-  font-size: 16px;
-  font-weight: 650;
-  color: var(--text-primary);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  justify-self: center;
-}
-
-.backButton {
-  padding-left: 6px;
-  padding-right: 10px;
-  justify-self: start;
-  gap: 0;
-}
-
-.backButton > span:last-child {
-  display: inline-flex;
-  align-items: center;
-  gap: 6px;
-}
-
-.backIcon {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-
-  svg {
-    display: block;
-  }
-}
-
-.backText {
-  font-weight: 600;
-  line-height: 18px;
-}
-
-.saveButton {
-  justify-self: end;
-}
-
-.loadingState {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  gap: $spacing-sm;
-  padding: $spacing-2xl 0;
-  color: var(--text-secondary);
-}
-
-.content {
-  display: flex;
-  flex-direction: column;
-  gap: $spacing-lg;
-}
-
 .settingsCard {
   padding: 0;
   overflow: visible;