fix: use group-hover for file tree icon color swap at all nesting levels

packages/app/src/components/file-tree.tsx

@@ -550,8 +550,15 @@ export default function FileTree(props: {
                       </Match>
                       <Match when={!node.ignored}>
                         <span class="filetree-iconpair size-4">
-                          <FileIcon node={node} class="size-4 filetree-icon filetree-icon--color" />
-                          <FileIcon node={node} class="size-4 filetree-icon filetree-icon--mono" mono />
+                          <FileIcon
+                            node={node}
+                            class="size-4 filetree-icon filetree-icon--color opacity-0 group-hover/filetree:opacity-100"
+                          />
+                          <FileIcon
+                            node={node}
+                            class="size-4 filetree-icon filetree-icon--mono group-hover/filetree:opacity-0"
+                            mono
+                          />
                         </span>
                       </Match>
                     </Switch>

packages/ui/src/components/file-icon.css

@@ -23,15 +23,3 @@
   position: absolute;
   inset: 0;
 }
-
-[data-component="filetree"] .filetree-iconpair .filetree-icon--color {
-  opacity: 0;
-}
-
-[data-component="filetree"]:hover .filetree-iconpair .filetree-icon--color {
-  opacity: 1;
-}
-
-[data-component="filetree"]:hover .filetree-iconpair .filetree-icon--mono {
-  opacity: 0;
-}