feat: post image diversity — style rotation + random scene/concept + expanded AI concepts bank

src/services/postImages.js

@@ -63,9 +63,11 @@ const IMAGE_PALETTES = {
  * Генерирует картинку к посту через GPT-5 /v1/responses + image_generation.
  */
 async function generatePostImage({ post, channel, style = {} }) {
-  // Если задано несколько стилей через запятую — случайно выбираем один
-  const styleList = (style.image_style || 'flat-illustration')
-    .split(',').map(s => s.trim()).filter(s => s && s !== 'auto');
+  // Если задано несколько стилей через запятую — случайно выбираем один.
+  // Если стиль не задан или 'auto' — ротация из трёх редакторских стилей.
+  const DEFAULT_ROTATION = 'realistic-photo,3d-render,flat-illustration';
+  const rawStyle = style.image_style && style.image_style !== 'auto' ? style.image_style : DEFAULT_ROTATION;
+  const styleList = rawStyle.split(',').map(s => s.trim()).filter(Boolean);
   const pickedStyle = styleList[Math.floor(Math.random() * styleList.length)] || 'flat-illustration';
   const imageStyle = IMAGE_STYLES[pickedStyle] || IMAGE_STYLES['flat-illustration'];
   const palette = style.image_custom_colors
@@ -78,10 +80,7 @@ async function generatePostImage({ post, channel, style = {} }) {
   // Визуальная метафора — конкретный предмет/сцена на основе темы
   const visualConcept = getPostVisualConcept(post, channel);
 
-  // Антураж + свет — меняется по хешу поста (детерминированно, но разнообразно)
-  let seed = 0;
-  for (let i = 0; i < post.length && i < 100; i++) seed = (seed * 31 + post.charCodeAt(i)) >>> 0;
-
+  // Антураж + свет — случайный выбор при каждой генерации (намеренно, не детерминированно)
   const SCENES = [
     { setting: 'warm oak desktop surface, afternoon sunlight from left window',    lighting: 'golden hour soft shadows', temp: 'warm amber' },
     { setting: 'white marble surface, clean studio',                               lighting: 'flat professional studio', temp: 'cool whites' },
@@ -91,8 +90,11 @@ async function generatePostImage({ post, channel, style = {} }) {
     { setting: 'glass surface over city lights at night',                         lighting: 'city glow from below',    temp: 'multicolor bokeh' },
     { setting: 'antique library floor, surrounded by books, candlelight',         lighting: 'warm candlelight side',   temp: 'amber parchment' },
     { setting: 'frosted glass, winter morning, ice crystals at edges',            lighting: 'diffused winter morning', temp: 'icy blues whites' },
+    { setting: 'concrete urban rooftop at golden hour, city skyline behind',      lighting: 'backlit warm haze',       temp: 'golden urban' },
+    { setting: 'minimalist white shelf, single object lit from above',            lighting: 'clean overhead spotlight', temp: 'pure whites' },
+    { setting: 'old wooden table in a sunlit greenhouse, plants around',          lighting: 'dappled greenhouse light', temp: 'fresh greens warm' },
   ];
-  const scene = SCENES[seed % SCENES.length];
+  const scene = SCENES[Math.floor(Math.random() * SCENES.length)];
 
   const prompt = `Generate a 16:9 editorial illustration for a social media post.
 
@@ -173,10 +175,7 @@ function getPostVisualConcept(post, channel) {
   const niche = (channel?.niche || '').toLowerCase();
   const combined = t + ' ' + niche;
 
-  // Хеш для выбора внутри категории
-  let seed = 0;
-  for (let i = 0; i < post.length && i < 80; i++) seed = (seed * 31 + post.charCodeAt(i)) >>> 0;
-  function pick(arr) { return arr[seed % arr.length]; }
+  function pick(arr) { return arr[Math.floor(Math.random() * arr.length)]; }
 
   const patterns = [
     {
@@ -188,6 +187,16 @@ function getPostVisualConcept(post, channel) {
         'A master key held up to warm light, intricate cuts visible, golden bokeh background',
         'A book opening by itself, pages turning rapidly, text rearranging mid-air in warm library',
         'An optical prism splitting white light into full spectrum, mounted on dark velvet surface',
+        'A chess board mid-game, one piece hovering in the air about to move, dramatic side light',
+        'An hourglass frozen mid-flow, sand suspended in air, dark moody background',
+        'A single neuron with glowing dendrites branching outward, macro medical illustration style',
+        'A telescope pointed at a star map, constellation lines drawn in light, observatory dome open',
+        'A maze viewed from above, a single glowing path found through it, aerial minimalist',
+        'A blank canvas with a single brushstroke that transforms into a landscape, studio light',
+        'Two puzzle pieces clicking together mid-air, warm backlight, close-up macro',
+        'A vintage radio with dials, sound waves visible as light trails, dark wood surface',
+        'An open toolbox with glowing tools arranged precisely, overhead industrial light',
+        'A library ladder reaching impossibly high shelves disappearing into mist, warm amber',
       ],
     },
     {