feat: routerai as primary image provider, Nyxos as fallback

- covers.js: RouterAI /responses → Nyxos /images/generations → SVG
- postImages.js: RouterAI /responses → Nyxos /images/generations
- config: imageBaseUrl = routerai, imageFallbackBaseUrl = nyxos
- app_settings: AI_IMAGE_BASE_URL = routerai, MODEL = gpt-5-image-mini

src/services/covers.js

@@ -325,23 +325,14 @@ async function generateCoverViaImageGenerations({ prompt }) {
     }
   }
 
-  // Основной: Nyxos Plus
+  // Основной: RouterAI /responses (стабильный)
   try {
-    return await tryProvider(config.ai.imageBaseUrl, config.ai.imageApiKey);
+    return await generateCoverViaRouterAI({ prompt });
   } catch (err) {
     const status = err.response?.status;
     if (!status || status >= 500) {
-      console.warn(`[Cover] primary failed (${status||'timeout'}), trying Nyxos fallback...`);
-      try {
+      console.warn(`[Cover] RouterAI failed (${status||'timeout'}), trying Nyxos fallback...`);
       return await tryProvider(config.ai.imageFallbackBaseUrl, config.ai.imageFallbackApiKey);
-      } catch (err2) {
-        const status2 = err2.response?.status;
-        if ((!status2 || status2 >= 500) && config.ai.routeraiApiKey) {
-          console.warn(`[Cover] Nyxos failed (${status2||'timeout'}), trying RouterAI /responses...`);
-          return await generateCoverViaRouterAI({ prompt });
-        }
-        throw err2;
-      }
     }
     throw err;
   }

src/services/postImages.js

@@ -85,41 +85,56 @@ ${style.image_prompt_instructions ? `\nChannel visual guidelines: ${style.image_
 Composition: 16:9 wide format, balanced, suitable for social media.
 Strictly: no text, no letters, no logos, no faces of real people.`;
 
-  // Используем Nyxos /images/generations (первичный провайдер)
-  // с fallback на aiguoguo — тот же путь что для обложек статей
-  const model = config.ai.imageModel || 'gpt-image-2';
+  // RouterAI /responses (primary) → Nyxos /images/generations (fallback)
+  const model = config.ai.routeraiImageModel || 'openai/gpt-5-image-mini';
 
-  async function tryProvider(baseUrl, apiKey) {
+  async function tryRouterAI() {
     const started = Date.now();
     try {
-      const res = await axios.post(
-        `${baseUrl}/images/generations`,
-        { model, prompt: prompt.slice(0, 4000), n: 1, size: '1024x1024', response_format: 'url' },
-        { headers: { Authorization: `Bearer ${apiKey}` }, timeout: 45_000 }
+      const res = await axios.post(`${config.ai.routeraiBaseUrl}/responses`, {
+        model,
+        input: `Use the image_generation tool to create this illustration. Only call the tool, no text.\n\n${prompt.slice(0, 3000)}`,
+        tools: [{ type: 'image_generation' }],
+        tool_choice: { type: 'image_generation' },
+      }, { headers: { Authorization: `Bearer ${config.ai.routeraiApiKey}` }, timeout: 120_000 });
+      const imgCall = (res.data?.output || []).find(o => o.type === 'image_generation_call');
+      if (!imgCall?.result) throw new Error('No image in RouterAI response');
+      aiUsage.log({ provider: 'routerai', requestType: 'image_via_responses', model, imageCount: 1, meta: { channel_id: channel.id }, durationMs: Date.now()-started, succeeded: true }).catch(() => {});
+      return Buffer.from(imgCall.result, 'base64');
+    } catch (err) {
+      aiUsage.log({ provider: 'routerai', requestType: 'image_via_responses', model, imageCount: 1, meta: { channel_id: channel.id }, durationMs: Date.now()-started, succeeded: false, errorMessage: (err.response?.data?.error?.message || err.message || '').slice(0, 500) }).catch(() => {});
+      throw err;
+    }
+  }
+
+  async function tryNyxos() {
+    const m = config.ai.imageModel || 'gpt-image-2';
+    const started = Date.now();
+    try {
+      const res = await axios.post(`${config.ai.imageFallbackBaseUrl}/images/generations`,
+        { model: m, prompt: prompt.slice(0, 4000), n: 1, size: '1024x1024', response_format: 'url' },
+        { headers: { Authorization: `Bearer ${config.ai.imageFallbackApiKey}` }, timeout: 90_000 }
       );
       const item = res.data?.data?.[0];
       if (!item) throw new Error('No image data');
-      aiUsage.log({ provider: aiUsage.providerFromBaseUrl(baseUrl), requestType: 'image', model, imageCount: 1, meta: { channel_id: channel.id }, succeeded: true }).catch(() => {});
-      if (item.url) {
-        const r = await axios.get(item.url, { responseType: 'arraybuffer', timeout: 60_000 });
-        return Buffer.from(r.data);
-      }
+      aiUsage.log({ provider: 'nyxos', requestType: 'image', model: m, imageCount: 1, meta: { channel_id: channel.id }, succeeded: true }).catch(() => {});
+      if (item.url) { const r = await axios.get(item.url, { responseType: 'arraybuffer', timeout: 60_000 }); return Buffer.from(r.data); }
       if (item.b64_json) return Buffer.from(item.b64_json, 'base64');
       throw new Error('No url or b64_json');
     } catch (err) {
-      aiUsage.log({ provider: aiUsage.providerFromBaseUrl(baseUrl), requestType: 'image', model, imageCount: 1, meta: { channel_id: channel.id }, succeeded: false, errorMessage: (err.response?.data?.error?.message || err.message || '').slice(0, 500) }).catch(() => {});
+      aiUsage.log({ provider: 'nyxos', requestType: 'image', model: m, imageCount: 1, meta: { channel_id: channel.id }, succeeded: false, errorMessage: (err.response?.data?.error?.message || err.message || '').slice(0, 500) }).catch(() => {});
       throw err;
     }
   }
 
   let bytes;
   try {
-    bytes = await tryProvider(config.ai.imageBaseUrl, config.ai.imageApiKey);
+    bytes = await tryRouterAI();
   } catch (err) {
     const status = err.response?.status;
     if (!status || status >= 500) {
-      console.warn('[postImages] primary failed, trying fallback...');
-      bytes = await tryProvider(config.ai.imageFallbackBaseUrl, config.ai.imageFallbackApiKey);
+      console.warn('[postImages] RouterAI failed, trying Nyxos fallback...');
+      bytes = await tryNyxos();
     } else { throw err; }
   }