feat: Connect Guardian portal to real student mastery tracking

- Add GuardianController API endpoint to fetch student progress, readiness, and weakness gap logs.
- Add dynamic JS logic to GuardianPortal.php to replace static mockups.
- Connect Exam AI diagnostics (weaknesses, socratic checks) directly to the parent's dashboard view.

backend/public/index.php

@@ -90,6 +90,9 @@ $router->get('/api/auth/me',           [\App\Controllers\AuthController::class,
 $router->get('/api/student/profile/status', [\App\Controllers\AuthController::class, 'studentProfileStatus'], [\App\Middlewares\AuthMiddleware::class]);
 $router->post('/api/student/profile/setup',  [\App\Controllers\AuthController::class, 'studentProfileSetup'],  [\App\Middlewares\AuthMiddleware::class]);
 
+// Guardian Routes (Authenticated)
+$router->get('/api/guardian/dashboard', [\App\Controllers\GuardianController::class, 'getDashboard'], [\App\Middlewares\AuthMiddleware::class]);
+
 // Legacy / Direct Auth
 $router->post('/api/auth/register', [\App\Controllers\AuthController::class, 'register'], [\App\Middlewares\RateLimitMiddleware::class]);
 $router->post('/api/auth/login',    [\App\Controllers\AuthController::class, 'login'],    [\App\Middlewares\RateLimitMiddleware::class]);