fix: reduce model enum from 35 to 8 for Figma compatibility

server.mjs

@@ -364,14 +364,15 @@ function registerHandlers(srv) {
           'Aspect: square|landscape|portrait. ' +
           'Optional: image_urls — list of HTTP(S) or data: URLs of reference images ' +
           '(style ref, seed, i2i) — works with Gemini, GPT-Image, FLUX 2, Seedream. ' +
-          'Returns {model,filepath,bytes,provider,latency_ms}.',
+          'Returns {model,filepath,bytes,provider,latency_ms}. ' +
+          'Use list_image_models for the full 35-model catalog.',
         inputSchema: {
           type: 'object',
           properties: {
             prompt: { type: 'string', description: 'Text prompt' },
             model: {
               type: 'string',
-              enum: models,
+              enum: ['google/gemini-2.5-flash-image', 'openai/gpt-image-2', 'recraft/recraft-v3', 'black-forest-labs/flux.2-flex', 'bytedance-seed/seedream-4.5', 'openai/gpt-image-1', 'microsoft/mai-image-2.5', 'x-ai/grok-imagine-image-quality'],
               default: 'google/gemini-2.5-flash-image',
             },
             aspect: {