feat: post drafts system — batch generation + daily auto-drafts

DB: post_drafts(channel_id, topic, text, image_url, status), channels.auto_draft_*
Engine:
  services/draftService.js: generateOneDraft, generateBatch, generateDailyDrafts,
    approveDraft(→scheduled_post), rejectDraft, updateDraft, listDrafts
  routes/drafts.js: GET/PATCH/DELETE /api/drafts/:id, /approve, /reject
    POST /api/channels/:channelId/drafts/generate?count=N (async, returns immediately)
  index.js: cron каждые 30 мин → generateDailyDrafts() для каналов с auto_draft_enabled
  channels.js: updateChannel сохраняет auto_draft_enabled/count/time

src/routes/drafts.js

@@ -0,0 +1,101 @@
+/**
+ * drafts.js — API для черновиков постов.
+ *
+ * POST /api/channels/:channelId/drafts/generate?count=3  — batch генерация
+ * GET  /api/drafts                                        — все черновики юзера
+ * GET  /api/drafts/:channelId/channel                     — черновики канала
+ * PATCH /api/drafts/:id                                   — редактировать текст
+ * POST  /api/drafts/:id/approve                           — одобрить → scheduled_post
+ * POST  /api/drafts/:id/reject                            — отклонить
+ * DELETE /api/drafts/:id                                  — удалить
+ */
+const express = require('express');
+const router  = express.Router();
+const { query }  = require('../config/db');
+const channelsSvc = require('../services/channels');
+const draftSvc   = require('../services/draftService');
+
+function uid(req) { return req.headers['x-user-id'] ? parseInt(req.headers['x-user-id']) : null; }
+
+// POST /api/channels/:channelId/drafts/generate
+router.post('/channels/:channelId/drafts/generate', async (req, res) => {
+  const userId = uid(req);
+  if (!userId) return res.status(401).json({ error: 'x-user-id required' });
+
+  const count = Math.min(parseInt(req.query.count || req.body.count || 3), 10);
+  const withImage = req.body.withImage !== false;
+
+  try {
+    const channel = await channelsSvc.getFullChannel(req.params.channelId);
+    if (!channel) return res.status(404).json({ error: 'Channel not found' });
+
+    // Запускаем асинхронно — отвечаем сразу
+    res.json({ ok: true, message: `Генерирую ${count} черновиков...`, count });
+
+    draftSvc.generateBatch(channel, { count, userId, withImage })
+      .then(r => console.log(`[drafts] batch done ch=${channel.id}: ${r.generated} ok, ${r.errors.length} err`))
+      .catch(e => console.error(`[drafts] batch error: ${e.message}`));
+  } catch (err) {
+    if (!res.headersSent) res.status(500).json({ error: err.message });
+  }
+});
+
+// GET /api/drafts — все черновики текущего пользователя
+router.get('/drafts', async (req, res) => {
+  const userId = uid(req);
+  if (!userId) return res.status(401).json({ error: 'x-user-id required' });
+  const { status = 'pending', limit = 30, offset = 0 } = req.query;
+  try {
+    const result = await draftSvc.listDrafts({ userId, status, limit: parseInt(limit), offset: parseInt(offset) });
+    res.json(result);
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+// GET /api/drafts/:channelId/channel — черновики конкретного канала
+router.get('/drafts/:channelId/channel', async (req, res) => {
+  const userId = uid(req);
+  if (!userId) return res.status(401).json({ error: 'x-user-id required' });
+  const { status = 'pending', limit = 30, offset = 0 } = req.query;
+  try {
+    const result = await draftSvc.listDrafts({ channelId: req.params.channelId, status, limit: parseInt(limit), offset: parseInt(offset) });
+    res.json(result);
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+// PATCH /api/drafts/:id — редактировать
+router.patch('/drafts/:id', async (req, res) => {
+  try {
+    await draftSvc.updateDraft(req.params.id, req.body);
+    res.json({ ok: true });
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+// POST /api/drafts/:id/approve
+router.post('/drafts/:id/approve', async (req, res) => {
+  const userId = uid(req);
+  try {
+    const result = await draftSvc.approveDraft(req.params.id, {
+      scheduledAt: req.body.scheduled_at,
+      userId,
+    });
+    res.json({ ok: true, ...result });
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+// POST /api/drafts/:id/reject
+router.post('/drafts/:id/reject', async (req, res) => {
+  try {
+    await draftSvc.rejectDraft(req.params.id);
+    res.json({ ok: true });
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+// DELETE /api/drafts/:id
+router.delete('/drafts/:id', async (req, res) => {
+  try {
+    await query('DELETE FROM post_drafts WHERE id=$1', [req.params.id]);
+    res.json({ ok: true });
+  } catch (err) { res.status(500).json({ error: err.message }); }
+});
+
+module.exports = router;