feat: custom mii images and refactor submit route

prisma/migrations/20250407113906_images_to_image_count/migration.sql

@@ -0,0 +1,9 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `images` on the `miis` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "miis" DROP COLUMN "images",
+ADD COLUMN     "imageCount" INTEGER NOT NULL DEFAULT 0;

prisma/schema.prisma

@@ -61,11 +61,11 @@ model Session {
 }
 
 model Mii {
-  id     Int      @id @default(autoincrement())
-  userId Int
-  name   String   @db.VarChar(64)
-  images String[]
-  tags   String[]
+  id         Int      @id @default(autoincrement())
+  userId     Int
+  name       String   @db.VarChar(64)
+  imageCount Int      @default(0)
+  tags       String[]
 
   firstName      String
   lastName       String