feat(frontend): main menu lists accounts with their avatars, switching opens the last chat of that account

frontend/src/lib/api/avatars.ts

@@ -66,9 +66,9 @@ async function fetchAvatar(
 
 export function loadAvatar(
   kind: AvatarKind,
-  id: number
+  id: number,
+  account: number | null = accounts.selectedId
 ): Promise<string | null> {
-  const account = accounts.selectedId;
   if (account === null) {
     return Promise.resolve(null);
   }