add png compression to save space

imageGenerator.js

@@ -2,12 +2,13 @@ import path from "path";
 import { mkdir, writeFile } from "fs/promises";
 import { fileURLToPath } from "url";
 import { callOllama } from "./ollamaClient.js";
+import { compressPng } from "./compressPng.js";
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const COMFYUI_URL = process.env.COMFYUI_URL || "http://localhost:8188";
 
 // Drawing style prefix
-const STYLE_PREFIX = `a high-contrast, black and white pen and ink drawing, hand-drawn sketch aesthetic, very low detail, visible loose linework, expressive simple hatching for shadows, quick conceptual sketch, subtle color accent`;
+const STYLE_PREFIX = `a high-contrast, black and white pen and ink drawing, hand-drawn sketch aesthetic, very low detail, extremely minimal, visible loose linework, expressive simple hatching for shadows, quick conceptual sketch, subtle color accent`;
 
 // 1. Generate engineered visual prompt
 async function generateVisualPrompt(flavor) {
@@ -181,6 +182,9 @@ async function generateImageViaComfyUI(prompt, filename) {
 
     console.log("Downloading image...");
     const filepath = await downloadImage(comfyFilename, filename);
+
+    console.log("Compressing PNG...");
+    await compressPng(filepath);
     return filepath;
 
   } catch (err) {