feat(admin): add system logs viewer, tabbed data management, fix AT20 sync

backend/src/routes/admin.routes.ts

@@ -15,12 +15,13 @@
 import { Router, Request, Response } from 'express';
 import { z } from 'zod';
 import axios from 'axios';
+import fs from 'fs';
+import path from 'path';
 import { authenticate } from '../middleware/auth.middleware';
 import { requirePermission } from '../middleware/rbac.middleware';
 import { auditExport } from '../middleware/audit.middleware';
 import auditService, { AuditAction, AuditResourceType, AuditFilters } from '../services/audit.service';
 import cleanupService from '../services/cleanup.service';
-import atemschutzService from '../services/atemschutz.service';
 import userService from '../services/user.service';
 import pool from '../config/database';
 import logger from '../utils/logger';
@@ -208,10 +209,6 @@ router.post(
     try {
       const response = await axios.post(`${FDISK_SYNC_URL}/trigger`, req.body, { timeout: 5000 });
       res.json({ success: true, data: response.data });
-      // Fire-and-forget: sync AT20 courses to atemschutz_traeger after FDISK data is written
-      atemschutzService.syncLehrgangFromKurse().catch(err =>
-        logger.error('AT20 Atemschutz-Sync fehlgeschlagen', { error: err })
-      );
     } catch (err: unknown) {
       if (axios.isAxiosError(err) && err.response?.status === 409) {
         res.status(409).json({ success: false, message: 'Sync already in progress' });
@@ -222,6 +219,47 @@ router.post(
   }
 );
 
+// ---------------------------------------------------------------------------
+// GET /api/admin/logs — read Winston application log files
+// ---------------------------------------------------------------------------
+
+const LOG_DIR = path.join(__dirname, '../../logs');
+
+router.get(
+  '/logs',
+  authenticate,
+  requirePermission('admin:view'),
+  async (req: Request, res: Response): Promise<void> => {
+    try {
+      const file = req.query.file === 'error' ? 'error.log' : 'combined.log';
+      const maxLines = Math.min(Math.max(Number(req.query.lines) || 500, 1), 2000);
+      const search = typeof req.query.search === 'string' ? req.query.search.toLowerCase() : '';
+
+      const filePath = path.join(LOG_DIR, file);
+
+      if (!fs.existsSync(filePath)) {
+        res.json({ success: true, data: { file, lines: [], total: 0 } });
+        return;
+      }
+
+      const content = fs.readFileSync(filePath, 'utf-8');
+      let allLines = content.split('\n').filter(l => l.trim().length > 0);
+
+      if (search) {
+        allLines = allLines.filter(l => l.toLowerCase().includes(search));
+      }
+
+      const total = allLines.length;
+      const lines = allLines.slice(-maxLines);
+
+      res.json({ success: true, data: { file, lines, total } });
+    } catch (error) {
+      logger.error('Failed to read log file', { error });
+      res.status(500).json({ success: false, message: 'Failed to read log file' });
+    }
+  }
+);
+
 // ---------------------------------------------------------------------------
 // Cleanup / Data Management endpoints
 // ---------------------------------------------------------------------------