feat(admin): centralize tool & module settings in Werkzeuge tab with per-tool permissions, DB-backed config, connection tests, and cog-button navigation

backend/src/app.ts

@@ -109,6 +109,7 @@ import fahrzeugTypRoutes       from './routes/fahrzeugTyp.routes';
 import ausruestungTypRoutes    from './routes/ausruestungTyp.routes';
 import buchhaltungRoutes        from './routes/buchhaltung.routes';
 import personalEquipmentRoutes  from './routes/personalEquipment.routes';
+import toolConfigRoutes         from './routes/toolConfig.routes';
 
 app.use('/api/auth',        authRoutes);
 app.use('/api/user',        userRoutes);
@@ -140,6 +141,7 @@ app.use('/api/fahrzeug-typen',    fahrzeugTypRoutes);
 app.use('/api/ausruestung-typen', ausruestungTypRoutes);
 app.use('/api/buchhaltung',      buchhaltungRoutes);
 app.use('/api/persoenliche-ausruestung', personalEquipmentRoutes);
+app.use('/api/admin/tools',            toolConfigRoutes);
 
 // Static file serving for uploads (authenticated)
 const uploadsDir = process.env.NODE_ENV === 'production' ? '/app/uploads' : path.resolve(__dirname, '../../uploads');