feat: add multi-model support

app/utils/string.ts

@@ -0,0 +1,19 @@
+export function trimEnd(s: string, end = " ") {
+  if (end.length === 0) return s;
+
+  while (s.endsWith(end)) {
+    s = s.slice(0, -end.length);
+  }
+
+  return s;
+}
+
+export function trimStart(s: string, start = " ") {
+  if (start.length === 0) return s;
+
+  while (s.endsWith(start)) {
+    s = s.slice(start.length);
+  }
+
+  return s;
+}