refactor: remove legacy 'Mi Carpeta' references, use 'My Folder' only

static/js/app.js

@@ -752,7 +752,7 @@ async function loadFiles(options = {}) {
             }
             
             // Skip other users' folders when at root
-            if (!app.currentPath && folder.name.startsWith('Mi Carpeta - ') && !folder.name.includes(username)) {
+            if (!app.currentPath && folder.name.startsWith('My Folder - ') && !folder.name.includes(username)) {
                 return false;
             }
             
@@ -1709,7 +1709,7 @@ async function findUserHomeFolder(username) {
         // This prevents loops when the folder can't be found
         const defaultFolder = {
             id: 'default-folder',
-            name: `Mi Carpeta - ${username}`,
+            name: `My Folder - ${username}`,
             parent_id: null,
             created_at: Date.now() / 1000,
             updated_at: Date.now() / 1000

static/js/modal.js

@@ -124,11 +124,11 @@ const Modal = {
         const t = window.i18n ? window.i18n.t.bind(window.i18n) : (k) => k;
         
         return this.prompt({
-            title: t('dialogs.new_folder_title') || 'Nueva carpeta',
-            label: t('dialogs.folder_name') || 'Nombre de la carpeta',
-            placeholder: t('dialogs.folder_placeholder') || 'Mi carpeta',
+            title: t('dialogs.new_folder_title') || 'New folder',
+            label: t('dialogs.folder_name') || 'Folder name',
+            placeholder: t('dialogs.folder_placeholder') || 'My folder',
             icon: 'fa-folder-plus',
-            confirmText: t('actions.create') || 'Crear'
+            confirmText: t('actions.create') || 'Create'
         });
     },