feat: completar fases 3 y 4 del roadmap mvp (gradebook, drag-and-drop, impersonacion) y actualizar README

backend/app/routes/api/students.py

@@ -0,0 +1,43 @@
+from flask import Blueprint, jsonify, request, g
+from app.utils.jwt_decorators import jwt_required
+from app.services.gradebook_service import GradebookService
+
+api_students_bp = Blueprint('api_students', __name__)
+
+
+@api_students_bp.route('/students/my-grades', methods=['GET'])
+@jwt_required
+def get_my_grades():
+    """Consulta individual de calificaciones y estado académico del alumno logueado."""
+    user = getattr(g, 'jwt_user', None)
+    user_id = user.id if user else getattr(request, 'current_user_id', None)
+    if not user_id:
+        return jsonify({'error': 'Unauthorized', 'message': 'Usuario no autenticado.'}), 401
+
+    try:
+        grades = GradebookService.get_student_grades(user_id)
+        return jsonify({
+            'status': 'success',
+            'student_id': user_id,
+            'is_impersonating': getattr(g, 'is_impersonating', False),
+            'data': grades
+        }), 200
+    except Exception as e:
+        return jsonify({'error': 'ServerError', 'message': str(e)}), 500
+
+
+@api_students_bp.route('/students/my-upcoming-milestones', methods=['GET'])
+@jwt_required
+def get_my_upcoming_milestones():
+    """Próximas evaluaciones e hitos académicos con cuenta regresiva para el dashboard."""
+    user = getattr(g, 'jwt_user', None)
+    user_id = user.id if user else getattr(request, 'current_user_id', None)
+    if not user_id:
+        return jsonify({'error': 'Unauthorized', 'message': 'Usuario no autenticado.'}), 401
+
+    limit = request.args.get('limit', default=5, type=int)
+    try:
+        milestones = GradebookService.get_student_upcoming_milestones(user_id, limit=limit)
+        return jsonify({'status': 'success', 'data': milestones}), 200
+    except Exception as e:
+        return jsonify({'error': 'ServerError', 'message': str(e)}), 500