fix : too high fade

lib/overview-image.ts

@@ -1,4 +1,4 @@
-export const overviewRoles = ["Main DPS", "Sub DPS", "Support"] as const;
+export const overviewRoles = ["Main DPS", "Sub DPS", "Support", "Custom"] as const;
 
 export type OverviewRole = (typeof overviewRoles)[number];
 
@@ -215,7 +215,7 @@ export function weaponTypeIconPath(weaponType: string | null): string | null {
   return fileName ? `/icon/weapon-types/${fileName}` : null;
 }
 
-export function overviewFileName(characterKey: string, role: OverviewRole): string {
+export function overviewFileName(characterKey: string, role: string): string {
   const safeKey = characterKey.replace(/[^\p{L}\p{N}._-]+/gu, "-");
   const safeRole = role.toLowerCase().replaceAll(" ", "-");
   return `overview-${safeKey}-${safeRole}.png`;