feat(settings): organize categories and include optional font storage

web/src/app/api.ts

@@ -60,6 +60,8 @@ export interface TrashItem {
 export interface StorageUsage {
   totalSize: number
   categories: { id: 'vault' | 'databases' | 'fonts' | 'themes' | 'plugins' | 'other'; size: number }[]
+  builtinFontsSize: number
+  customFontsSize: number
   assetsSize: number
   trashSize: number
   calculatedAt: number