feat: add admin accounts and image templates

app/api/generations/image/route.ts

@@ -5,6 +5,7 @@ import { requestOrigin } from "@/lib/server/runtime";
 import { submitImageJob } from "@/lib/server/generation-service";
 import { assemblePrompt, type PromptAssemblyInput, type PromptMaterial } from "@/lib/prompt/assembler";
 import type { EnabledImageCapability } from "@/lib/types";
+import type { ImageCreationEngine } from "@/lib/evolink/image-client";
 
 export const runtime = "nodejs";
 
@@ -23,6 +24,7 @@ export async function POST(request: Request) {
     const user = await requireAppUser();
     const body = await readJsonBody<{
       capability?: EnabledImageCapability;
+      engine?: ImageCreationEngine;
       prompt?: string;
       imageUrls?: string[];
       materials?: PromptMaterial[];
@@ -46,6 +48,7 @@ export async function POST(request: Request) {
     const job = await submitImageJob({
       ownerId: user.id,
       capability,
+      engine: body.engine,
       prompt: body.prompt || assembled?.prompt,
       imageUrls: body.imageUrls || materialImages,
       inputAssetIds: body.inputAssetIds || (body.materials || []).map((material) => material.id).filter(Boolean) as string[],