feat: move upload logic from avatar to book cover

- add checks on user permissions
- randomized file name (not sure it is the right thing to do)

Author: DecampsRenan

package.json

@@ -68,7 +68,7 @@
     "@tanstack/zod-adapter": "1.132.47",
     "@uidotdev/usehooks": "2.4.1",
     "better-auth": "1.3.27",
-    "better-upload": "2.0.1",
+    "better-upload": "2.0.3",
     "boring-avatars": "2.0.4",
     "class-variance-authority": "0.7.1",
     "clsx": "2.1.1",

pnpm-lock.yaml

@@ -26,7 +26,6 @@ model User {
   updatedAt     DateTime  @updatedAt
   sessions      Session[]
   accounts      Account[]
-  avatarFileId  String?
 
   role        UserRole?
   banned      Boolean?
@@ -94,6 +93,7 @@ model Book {
   genre     Genre?   @relation(fields: [genreId], references: [id])
   genreId   String
   publisher String?
+  coverId   String?
 
   @@unique([title, author])
   @@map("book")