feat: Зеро-персонаж, auto-publish, auto-series, channel-stats, fallback covers

- Персонаж Зеро: 23 позы (zeroCharacter.js), скрипты генерации
- Auto-publish статей в TG: multipart upload, кнопки, режим alternating Zero/cover
- Fallback цепочка обложек: aiprimetech gpt-5.5 → Pollinations → local SVG (6 палитр)
- Auto-series: Claude haiku определяет серию для каждой статьи автоматически
- Channel stats: подписчики, история, delta 24h/7d
- Photo-search: Yandex API, профили доменов, Redis лимиты
- Scheduled posts runner: backfill, preview, queue, cancel
- promptBuilder: author_persona Зеро, голос от первого лица
- Fixes: dollar-placeholder bugs в PATCH channels/autogen, listArticles фильтры
- AI model: gpt-5.5 для image generation

src/services/userPosts.js

@@ -1,14 +1,15 @@
 const { query } = require('../config/db');
 const axios = require('axios');
+const settings = require('../services/settings');
 
 /**
  * Сохранить пост в базу (как черновик или сразу запланированный).
  */
-async function savePost({ userId, channelId, content, imageUrl = null, topic = null, status = 'draft', scheduledAt = null }) {
+async function savePost({ userId, channelId, content, imageUrl = null, imageCredit = null, topic = null, status = 'draft', scheduledAt = null }) {
   const { rows } = await query(
-    `INSERT INTO user_posts (user_id, channel_id, content, image_url, topic, status, scheduled_at)
-     VALUES ($1,$2,$3,$4,$5,$6,$7) RETURNING *`,
-    [userId, channelId, content, imageUrl, topic, status, scheduledAt]
+    `INSERT INTO user_posts (user_id, channel_id, content, image_url, image_credit, topic, status, scheduled_at)
+     VALUES ($1,$2,$3,$4,$5,$6,$7,$8) RETURNING *`,
+    [userId, channelId, content, imageUrl, imageCredit, topic, status, scheduledAt]
   );
   return rows[0];
 }
@@ -30,7 +31,7 @@ async function getPost(userId, postId) {
 }
 
 async function updatePost(userId, postId, data) {
-  const allowed = ['content','image_url','status','scheduled_at','topic'];
+  const allowed = ['content','image_url','image_credit','status','scheduled_at','topic'];
   const fields = []; const vals = []; let i = 1;
   for (const key of allowed) {
     if (data[key] !== undefined) { fields.push(`${key}=$${i++}`); vals.push(data[key]); }
@@ -63,7 +64,7 @@ async function publishToTelegram(post, channel) {
       ? post.image_url
       : `https://app.zeropost.ru${post.image_url}`;
     const res = await axios.post(
-      `https://api.telegram.org/bot${channel.bot_token}/sendPhoto`,
+      `${await settings.get('TELEGRAM_API_BASE', 'https://api.telegram.org')}/bot${channel.bot_token}/sendPhoto`,
       {
         chat_id: channel.tg_channel_id,
         photo: photoUrl,
@@ -75,7 +76,7 @@ async function publishToTelegram(post, channel) {
     return { ok: true, message_id: res.data?.result?.message_id };
   } else {
     const res = await axios.post(
-      `https://api.telegram.org/bot${channel.bot_token}/sendMessage`,
+      `${await settings.get('TELEGRAM_API_BASE', 'https://api.telegram.org')}/bot${channel.bot_token}/sendMessage`,
       {
         chat_id: channel.tg_channel_id,
         text: post.content,