feat: GET /images/<filename> direct download + download_url in response

server.mjs

@@ -500,6 +500,7 @@ function registerHandlers(srv) {
               tool: name, model, provider, mime, aspect, transparent,
               refs_used: imageUrls.length, filepath, filename, bytes: size,
               latency_ms: Date.now() - t0,
+              download_url: `https://img-gen-ai.dynv6.net/images/${filename}`,
             }, null, 2) },
           ],
         };
@@ -518,7 +519,7 @@ function registerHandlers(srv) {
         return {
           content: [
             { type: 'image', mimeType: mime, data: buf.toString('base64') },
-            { type: 'text', text: JSON.stringify({ filename, filepath, bytes: buf.length, mime }, null, 2) },
+            { type: 'text', text: JSON.stringify({ filename, filepath, bytes: buf.length, mime, download_url: `https://img-gen-ai.dynv6.net/images/${filename}` }, null, 2) },
           ],
         };
       }
@@ -580,6 +581,35 @@ const httpServer = http.createServer(async (req, res) => {
   process.stderr.write(`[HTTP] ${req.method} ${url.pathname} -> incoming\n`);
 
   try {
+    // ---- Serve saved images directly (GET /images/<filename>) ----
+    if (url.pathname.startsWith('/images/') && req.method === 'GET') {
+      const filename = url.pathname.slice('/images/'.length);
+      // Security: prevent path traversal
+      if (!filename || filename.includes('/') || filename.includes('\\') || filename.includes('..')) {
+        res.statusCode = 400;
+        res.setHeader('content-type', 'application/json');
+        res.end(JSON.stringify({ error: 'invalid filename' }));
+        return;
+      }
+      const filepath = path.join(OUTPUT_DIR, filename);
+      try {
+        const buf = await fs.readFile(filepath);
+        const ext = path.extname(filename).toLowerCase();
+        const mime = ext === '.png' ? 'image/png' : ext === '.jpg' || ext === '.jpeg' ? 'image/jpeg' : ext === '.webp' ? 'image/webp' : 'application/octet-stream';
+        res.statusCode = 200;
+        res.setHeader('content-type', mime);
+        res.setHeader('content-length', buf.length);
+        res.setHeader('cache-control', 'public, max-age=3600');
+        res.end(buf);
+      } catch (e) {
+        res.statusCode = 404;
+        res.setHeader('content-type', 'application/json');
+        res.end(JSON.stringify({ error: 'file not found' }));
+      }
+      process.stderr.write(`[image] GET ${filename} -> ${res.statusCode}\n`);
+      return;
+    }
+
     // ---- Traditional SSE transport (for Figma) ----
     if (url.pathname === '/sse' && req.method === 'GET') {
       const sseTransport = new SSEServerTransport('/messages', res);