test backend changes api snivver interfaces

frontend/src/index.less

@@ -14,7 +14,7 @@ html {
 
 /* Root background and typography (matches theme background + font) */
 body {
-  font-family: "Inter", "Roboto", "Helvetica", "Arial", sans-serif;
+  font-family: 'Inter', 'Roboto', 'Helvetica', 'Arial', sans-serif;
   background-color: #f9f9f9; /* matches theme.palette.background.default */
   color: #262626; /* matches theme.palette.text.primary */
   line-height: 1.6;
@@ -70,13 +70,15 @@ a:hover {
 .fade-enter-active {
   opacity: 1;
   transform: translateY(0);
-  transition: opacity 0.3s, transform 0.3s;
+  transition:
+    opacity 0.3s,
+    transform 0.3s;
 }
 
 /* === Code blocks / preformatted text === */
 pre,
 code {
-  font-family: "JetBrains Mono", "Fira Code", monospace;
+  font-family: 'JetBrains Mono', 'Fira Code', monospace;
 }
 
 /* === App container fix for fixed header === */