fix: Ensure initials on avatars are always displayed uppercase

app/models/Collection.ts

@@ -133,7 +133,7 @@ export default class Collection extends ParanoidModel {
    */
   @computed
   get initial() {
-    return this.name ? this.name[0] : "?";
+    return (this.name ? this.name[0] : "?").toUpperCase();
   }
 
   fetchDocuments = async (options?: { force: boolean }) => {

app/models/Team.ts

@@ -80,7 +80,7 @@ class Team extends Model {
 
   @computed
   get initial(): string {
-    return this.name ? this.name[0] : "?";
+    return (this.name ? this.name[0] : "?").toUpperCase();
   }
 
   /**

app/models/User.ts

@@ -61,7 +61,7 @@ class User extends ParanoidModel {
 
   @computed
   get initial(): string {
-    return this.name ? this.name[0] : "?";
+    return (this.name ? this.name[0] : "?").toUpperCase();
   }
 
   @computed