feat(logging): implement centralized logging system and replace console errors with structured logs

feat(federation): add room sync and deletion notification endpoints for federated instances

fix(federation): handle room deletion and update settings during sync process

feat(federation): enhance FederatedRoomCard and FederatedRoomDetail components to display deleted rooms

i18n: add translations for room deletion messages in English and German

server/routes/admin.js

@@ -2,6 +2,7 @@ import { Router } from 'express';
 import bcrypt from 'bcryptjs';
 import { getDb } from '../config/database.js';
 import { authenticateToken, requireAdmin } from '../middleware/auth.js';
+import { log } from '../config/logger.js';
 
 const EMAIL_RE = /^[^\s@]{1,64}@[^\s@]{1,253}\.[^\s@]{2,}$/;
 
@@ -57,7 +58,7 @@ router.post('/users', authenticateToken, requireAdmin, async (req, res) => {
     const user = await db.get('SELECT id, name, display_name, email, role, created_at FROM users WHERE id = ?', [result.lastInsertRowid]);
     res.status(201).json({ user });
   } catch (err) {
-    console.error('Create user error:', err);
+    log.admin.error(`Create user error: ${err.message}`);
     res.status(500).json({ error: 'User could not be created' });
   }
 });
@@ -75,7 +76,7 @@ router.get('/users', authenticateToken, requireAdmin, async (req, res) => {
 
     res.json({ users });
   } catch (err) {
-    console.error('List users error:', err);
+    log.admin.error(`List users error: ${err.message}`);
     res.status(500).json({ error: 'Users could not be loaded' });
   }
 });
@@ -109,7 +110,7 @@ router.put('/users/:id/role', authenticateToken, requireAdmin, async (req, res)
 
     res.json({ user: updated });
   } catch (err) {
-    console.error('Update role error:', err);
+    log.admin.error(`Update role error: ${err.message}`);
     res.status(500).json({ error: 'Role could not be updated' });
   }
 });
@@ -139,7 +140,7 @@ router.delete('/users/:id', authenticateToken, requireAdmin, async (req, res) =>
     await db.run('DELETE FROM users WHERE id = ?', [req.params.id]);
     res.json({ message: 'User deleted' });
   } catch (err) {
-    console.error('Delete user error:', err);
+    log.admin.error(`Delete user error: ${err.message}`);
     res.status(500).json({ error: 'User could not be deleted' });
   }
 });
@@ -158,7 +159,7 @@ router.put('/users/:id/password', authenticateToken, requireAdmin, async (req, r
 
     res.json({ message: 'Password reset' });
   } catch (err) {
-    console.error('Reset password error:', err);
+    log.admin.error(`Reset password error: ${err.message}`);
     res.status(500).json({ error: 'Password could not be reset' });
   }
 });