feat: image rubrics with AI selection for cover variety

- channel_style.image_rubrics (JSONB): 6 рубрик для ZeroPost-блога
  (tech-photo, 3d-device, code-screen, data-flow, ai-neural, cinematic-tech)
- selectRubric(): haiku выбирает рубрику по заголовку+тегам статьи
- generateCover(): загружает rubrics из БД, вызывает selectRubric перед генерацией
- buildCoverPrompt(): принимает rubric — рубрика задаёт весь визуальный язык
- Убраны лишние ограничения (no circuit boards, no glowing nodes, no brains)
  из базового промпта — теперь только: no text, no logos, no real faces

regen-covers.js

@@ -0,0 +1,32 @@
+require('dotenv').config({ path: '/var/www/zeropost-engine/.env' });
+process.chdir('/var/www/zeropost-engine');
+
+const covers = require('./src/services/covers');
+const config = require('./src/config');
+const { query } = require('./src/config/db');
+
+const DELAY_MS = 8000;
+const sleep = ms => new Promise(r => setTimeout(r, ms));
+
+(async () => {
+  await config.reloadAi();
+  const { rows } = await query('SELECT id, title, tags FROM articles WHERE cover_url IS NOT NULL ORDER BY id');
+  console.log(`Total articles: ${rows.length}`);
+
+  let ok = 0, fail = 0;
+  for (const a of rows) {
+    try {
+      console.log(`\n[${ok+fail+1}/${rows.length}] article=${a.id}: ${a.title.slice(0,60)}`);
+      const url = await covers.generateCover({ articleId: a.id, title: a.title, tags: a.tags||[], channelId: 1 });
+      console.log(`  ✓ ${url}`);
+      ok++;
+    } catch(e) {
+      console.log(`  ✗ FAIL: ${e.message.slice(0,100)}`);
+      fail++;
+    }
+    if (ok + fail < rows.length) await sleep(DELAY_MS);
+  }
+
+  console.log(`\nDone: ${ok} OK, ${fail} failed`);
+  process.exit(0);
+})().catch(e => { console.error(e); process.exit(1); });

src/services/covers.js

@@ -83,12 +83,21 @@ function pickStyleIndex(articleId) {
  */
 /**
  * Промпт для обложки.
- * Приоритет: channelStyle.image_prompt_instructions → channelStyle.image_style → COVER_STYLES rotation.
+ * Приоритет: rubric.prompt → channelStyle.image_style → COVER_STYLES rotation.
+ * Рубрика полностью задаёт визуальный язык — ограничения внутри неё.
  */
-function buildCoverPrompt({ title, tags = [], articleId = 0, channelStyle = null }) {
+function buildCoverPrompt({ title, tags = [], articleId = 0, channelStyle = null, rubric = null }) {
-  const subject = title.replace(/[«»\":?!.]/g, '').slice(0, 100);
+  const subject = title.replace(/[«»\\\":?!.]/g, '').slice(0, 100);
   const tagHint = tags.slice(0, 2).join(', ');
 
+  // Если рубрика выбрана — она задаёт весь визуальный язык
+  if (rubric?.prompt) {
+    return `${rubric.prompt}
+
+Article subject: "${subject}".${tagHint ? ` Theme: ${tagHint}.` : ''}
+Wide 16:9 format. No text, no letters, no logos, no identifiable real human faces.`;
+  }
+
   let styleDesc, paletteDesc, moodDesc, compositionDesc;
 
   const csStyle = channelStyle?.image_style;
@@ -98,7 +107,7 @@ function buildCoverPrompt({ title, tags = [], articleId = 0, channelStyle = null
     '3d-render': { style: '3D render, soft studio lighting, isometric perspective, smooth surfaces, modern materials, Blender-quality', mood: 'polished, technical, premium', comp: 'three-quarter view, dramatic lighting' },
     'cartoon': { style: 'cartoon illustration, bold outlines, vibrant colors, expressive shapes, comic book style', mood: 'playful, energetic', comp: 'dynamic, high contrast' },
     'minimal': { style: 'extremely minimalist, single focal element, generous negative space, monochrome or duotone', mood: 'calm, sophisticated, editorial', comp: 'single centered element, maximum negative space' },
-    'abstract': { style: 'abstract artwork, layered geometric shapes, conceptual composition, mood and texture focused, no literal objects', mood: 'creative, sophisticated, tech-forward', comp: 'asymmetric layers, visual tension' },
+    'abstract': { style: 'abstract artwork, layered geometric shapes, conceptual composition, mood and texture focused', mood: 'creative, sophisticated, tech-forward', comp: 'asymmetric layers, visual tension' },
     'sketch': { style: 'hand-drawn sketch style, pencil and ink, loose confident lines, editorial illustration', mood: 'authentic, crafted, organic', comp: 'dynamic gestural lines, sketch book aesthetic' },
     'cyberpunk': { style: 'cyberpunk aesthetic, neon glowing lights, futuristic dark atmosphere, Blade Runner vibe', mood: 'bold, futuristic, dark', comp: 'dramatic angles, foreground/background depth' },
   };
@@ -112,7 +121,6 @@ function buildCoverPrompt({ title, tags = [], articleId = 0, channelStyle = null
     styleDesc = s.style; paletteDesc = s.palette; moodDesc = s.mood; compositionDesc = s.composition + '. Wide 16:9 format.';
   }
 
-  // Цветовая палитра из настроек канала перекрывает дефолт
   if (channelStyle?.image_custom_colors) {
     paletteDesc = `custom brand palette: ${channelStyle.image_custom_colors}`;
   } else if (channelStyle?.image_palette && channelStyle.image_palette !== 'auto') {
@@ -126,10 +134,10 @@ Style: ${styleDesc}.
 ${paletteDesc ? `Color palette: ${paletteDesc}.` : ''}
 Mood: ${moodDesc}.
 Composition: ${compositionDesc}
-${tagHint ? `Theme cues (subtle, abstract — not literal): ${tagHint}.` : ''}
+${tagHint ? `Theme cues (subtle, abstract): ${tagHint}.` : ''}
 ${channelStyle?.image_prompt_instructions ? `\nChannel visual guidelines: ${channelStyle.image_prompt_instructions}` : ''}
 
-Strictly: no text, no letters, no logos, no human faces, no robots, no brains, no glowing nodes, no circuit boards, no clocks, no screens.`;
+Strictly: no text, no letters, no logos, no identifiable real human faces.`;
 }
 
 /**
@@ -337,22 +345,67 @@ async function generateCoverViaPollinations({ prompt }) {
 /**
  * Главный путь генерации. Использует /v1/responses, при ошибке падает в legacy.
  */
+
+/**
+ * Выбирает наиболее подходящую рубрику для обложки статьи.
+ * Дешёвый haiku-вызов: ~50 токенов. При ошибке — случайная рубрика.
+ */
+async function selectRubric({ title, tags = [], rubrics }) {
+  if (!rubrics || rubrics.length === 0) return null;
+  if (rubrics.length === 1) return rubrics[0];
+
+  const rubricList = rubrics.map((r, i) => `${i}. ${r.id}: ${r.desc}`).join('\n');
+  const userMsg = `Article title: "${title}"\nTags: ${tags.join(', ') || 'none'}\n\nRubrics:\n${rubricList}\n\nRespond with ONLY the index number (0-${rubrics.length - 1}) of the best matching rubric.`;
+
+  try {
+    const res = await axios.post(
+      `${config.ai.baseUrl}/chat/completions`,
+      {
+        model: config.ai.models.post || 'claude-haiku-4-5-20251001',
+        max_tokens: 5,
+        temperature: 0,
+        messages: [
+          { role: 'system', content: 'You select a visual style for article cover images. Reply with only a single digit index number.' },
+          { role: 'user', content: userMsg },
+        ],
+      },
+      { headers: { Authorization: `Bearer ${config.ai.apiKey}` }, timeout: 10000 }
+    );
+    const raw = res.data?.choices?.[0]?.message?.content?.trim() || '0';
+    const idx = parseInt(raw.replace(/\D/g, '')) || 0;
+    const safeIdx = Math.min(Math.max(idx, 0), rubrics.length - 1);
+    return rubrics[safeIdx];
+  } catch (err) {
+    console.warn('[Cover] selectRubric failed, using random:', err.message.slice(0, 80));
+    return rubrics[Math.floor(Math.random() * rubrics.length)];
+  }
+}
+
 async function generateCover({ articleId, title, tags = [], channelId = null }) {
-  // Подгружаем настройки изображений канала, если channelId передан
+  // Подгружаем настройки канала включая рубрики
   let channelStyle = null;
   if (channelId) {
     try {
-      const r = await query('SELECT image_style, image_palette, image_custom_colors, image_prompt_instructions FROM channel_style WHERE channel_id = $1', [channelId]);
+      const r = await query('SELECT image_style, image_palette, image_custom_colors, image_prompt_instructions, image_rubrics FROM channel_style WHERE channel_id = $1', [channelId]);
       channelStyle = r.rows[0] || null;
     } catch (err) {
       console.warn('[Cover] channel_style load failed, using defaults:', err.message);
     }
   }
 
-  const prompt = buildCoverPrompt({ title, tags, articleId, channelStyle });
+  // Выбираем рубрику если они заданы
-  const styleIdx = pickStyleIndex(articleId);
+  let selectedRubric = null;
-  const styleName = channelStyle?.image_style || COVER_STYLES[styleIdx].name;
+  const rubrics = channelStyle?.image_rubrics;
-  console.log(`[Cover] article=${articleId} channel=${channelId || 'none'} style=${styleName}`);
+  if (Array.isArray(rubrics) && rubrics.length > 0) {
+    selectedRubric = await selectRubric({ title, tags, rubrics });
+    console.log(`[Cover] article=${articleId} channel=${channelId} rubric=${selectedRubric?.id}`);
+  } else {
+    const styleIdx = pickStyleIndex(articleId);
+    const styleName = channelStyle?.image_style || COVER_STYLES[styleIdx].name;
+    console.log(`[Cover] article=${articleId} channel=${channelId || 'none'} style=${styleName}`);
+  }
+
+  const prompt = buildCoverPrompt({ title, tags, articleId, channelStyle, rubric: selectedRubric });
 
   let img;
   let usedPath = 'images-generations';