Initial commit — DLS lab-app Flutter project

lib/core/router/router_provider.dart

@@ -0,0 +1,52 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:go_router/go_router.dart';
+import '../providers/auth_provider.dart';
+import 'app_router.dart';
+
+// Bridges Riverpod auth state changes to GoRouter's Listenable interface
+class _AuthRouterNotifier extends ChangeNotifier {
+  _AuthRouterNotifier(this._ref) {
+    _ref.listen<AuthState>(authProvider, (_, __) => notifyListeners());
+  }
+  final Ref _ref;
+}
+
+final routerProvider = Provider<GoRouter>((ref) {
+  final notifier = _AuthRouterNotifier(ref);
+
+  return GoRouter(
+    refreshListenable: notifier,
+    initialLocation: routeSignIn,
+    redirect: (context, state) {
+      final auth = ref.read(authProvider);
+
+      if (auth.isLoading) return null;
+
+      final loc = state.matchedLocation;
+      final onLoginOrRegister = loc == routeSignIn || loc == routeSignUp;
+      final onAuthPage = onLoginOrRegister || loc == routeOnboarding;
+
+      if (!auth.isAuthenticated) {
+        return onAuthPage ? null : routeSignIn;
+      }
+
+      // Authenticated but no tenant → onboarding
+      if (auth.activeTenant == null) {
+        return loc == routeOnboarding ? null : routeOnboarding;
+      }
+
+      final isLab = auth.activeTenant!.tenant.isLab;
+
+      if (onAuthPage) {
+        return isLab ? routeLabDashboard : routeClinicDashboard;
+      }
+
+      if (isLab && loc.startsWith('/clinic')) return routeLabDashboard;
+      if (!isLab && loc.startsWith('/lab')) return routeClinicDashboard;
+
+      return null;
+    },
+    routes: buildRoutes(),
+  );
+});