fix(ui): error-handle fire-and-forget mutations in settings panels

apps/next/src/components/settings/dotfiles/dotfiles-manager.tsx

@@ -160,13 +160,17 @@ export const DotfilesManager = () => {
 
   const saveSelected = async (next: string) => {
     if (!selected) return;
-    await putFile({
-      path: selected.path,
-      content: next,
-      isExecutable: selected.isExecutable,
-    });
-    setSavedContent(next);
-    toast.success('Saved.');
+    try {
+      await putFile({
+        path: selected.path,
+        content: next,
+        isExecutable: selected.isExecutable,
+      });
+      setSavedContent(next);
+      toast.success('Saved.');
+    } catch (error) {
+      toast.error(error instanceof Error ? error.message : 'Save failed.');
+    }
   };
 
   const importAll = async (incoming: UploadFile[]) => {
@@ -231,11 +235,15 @@ export const DotfilesManager = () => {
 
   const deleteSelected = async () => {
     if (!selected) return;
-    await removeFile({ fileId: selected._id as never });
-    setSelected(undefined);
-    setContent('');
-    setSavedContent('');
-    toast.success('Deleted.');
+    try {
+      await removeFile({ fileId: selected._id as never });
+      setSelected(undefined);
+      setContent('');
+      setSavedContent('');
+      toast.success('Deleted.');
+    } catch (error) {
+      toast.error(error instanceof Error ? error.message : 'Delete failed.');
+    }
   };
 
   return (
@@ -345,8 +353,12 @@ export const DotfilesManager = () => {
       <RepoPanel
         settings={settings}
         onSave={async (values) => {
-          await updateEnv(values);
-          toast.success('Saved.');
+          try {
+            await updateEnv(values);
+            toast.success('Saved.');
+          } catch (error) {
+            toast.error(error instanceof Error ? error.message : 'Save failed.');
+          }
         }}
       />