feat(image-gen): add NanoGPT image generation provider (#1899)

Integrated into release/v3.7.9

open-sse/config/imageRegistry.ts

@@ -437,6 +437,20 @@ export const IMAGE_PROVIDERS: Record<string, ImageProviderConfig> = {
     models: [{ id: "topaz-enhance", name: "topaz-enhance", inputModalities: ["image"] }],
     supportedSizes: ["1024x1024"],
   },
+  nanogpt: {
+    id: "nanogpt",
+    baseUrl: "https://nano-gpt.com/api/v1/images/generations",
+    authType: "apikey",
+    authHeader: "bearer",
+    format: "openai",
+    models: [
+      { id: "qwen-image", name: "Qwen Image", inputModalities: ["text", "image"] },
+      { id: "z-image-turbo", name: "Z Image Turbo" },
+      { id: "chroma", name: "Chroma" },
+      { id: "hidream", name: "Hidream I1 Full" },
+    ],
+    supportedSizes: ["1024x1024", "1024x1280", "1280x1024"],
+  },
 };
 
 /**

open-sse/handlers/imageGeneration.ts

@@ -45,6 +45,7 @@ const OPENAI_IMAGE_TO_IMAGE_MODELS = new Set([
   "flux-kontext-max",
   "flux-kontext",
   "flux-kontext-pro",
+  "qwen-image",
 ]);
 
 const BFL_MODEL_ENDPOINTS = {