feat(sim-builder): тумблер «Конструктор симуляций» в админке (feature_sim_builder_enabled) — гейт авторинга + скрытие/редирект

backend/src/controllers/adminController.js

@@ -525,7 +525,7 @@ function getFeatures(_req, res) {
 function updateFeatures(req, res) {
   const allowed = ['crossword', 'hangman', 'pet', 'red_book', 'collection',
                    'flashcards', 'knowledge_map', 'board', 'biochem', 'live_quiz', 'classroom',
-                   'gamification', 'assistant'];
+                   'gamification', 'assistant', 'sim_builder'];
   const updates = req.body;
   const stmt = db.prepare("INSERT OR REPLACE INTO app_settings (key, value) VALUES (?, ?)");
   const getOld = db.prepare("SELECT value FROM app_settings WHERE key = ?");

backend/src/routes/customSims.js

@@ -6,29 +6,35 @@
 const express = require('express');
 const router  = express.Router();
 const { authMiddleware, requireRole } = require('../middleware/auth');
+const { requireFeature } = require('../middleware/features');
 const c = require('../controllers/customSimController');
 
 router.use(authMiddleware);
 
+// «Конструктор симуляций» можно отключить в админке (feature_sim_builder_enabled).
+// Чтение/проигрывание уже сохранённых симуляций остаётся доступным; гейтим только
+// авторинг — создание/правку/удаление/раздачу/клон/связи.
+const gate = requireFeature('sim_builder');
+
 router.get('/',    c.list);
 // @public-by-design: router-level authMiddleware (above) + ownership/published check in handler
 router.get('/:id', c.get);
 // @public-by-design: router-level authMiddleware (above) + ownership/published check in handler
 router.get('/:id/related', c.related);
 
-router.post('/', requireRole('teacher', 'admin'), c.create);
+router.post('/', gate, requireRole('teacher', 'admin'), c.create);
 // @public-by-design: router-level authMiddleware (above) + per-row ownership check in handler
-router.put('/:id',    requireRole('teacher', 'admin'), c.update);
+router.put('/:id',    gate, requireRole('teacher', 'admin'), c.update);
 // @public-by-design: router-level authMiddleware (above) + per-row ownership check in handler
-router.delete('/:id', requireRole('teacher', 'admin'), c.remove);
+router.delete('/:id', gate, requireRole('teacher', 'admin'), c.remove);
 
 // Фаза 6 — раздача классу / клон / курикулумные связи. Мутации — inline
 // requireRole(teacher,admin) + per-row ownership в хендлере.
-router.post('/:id/share',  requireRole('teacher', 'admin'), c.share);
-router.post('/:id/clone',  requireRole('teacher', 'admin'), c.clone);
+router.post('/:id/share',  gate, requireRole('teacher', 'admin'), c.share);
+router.post('/:id/clone',  gate, requireRole('teacher', 'admin'), c.clone);
 // @public-by-design: router-level authMiddleware (above) + per-row ownership check in handler
-router.post('/:id/links',          requireRole('teacher', 'admin'), c.addLink);
+router.post('/:id/links',          gate, requireRole('teacher', 'admin'), c.addLink);
 // @public-by-design: router-level authMiddleware (above) + per-row ownership check in handler
-router.delete('/:id/links/:linkId', requireRole('teacher', 'admin'), c.removeLink);
+router.delete('/:id/links/:linkId', gate, requireRole('teacher', 'admin'), c.removeLink);
 
 module.exports = router;