feat: update login api

apps/user/views.py

@@ -1,10 +1,12 @@
 from rest_framework import viewsets, filters, status
-from rest_framework.decorators import action
-from rest_framework.permissions import IsAuthenticated
+from rest_framework.decorators import action, api_view, permission_classes
+from rest_framework.permissions import IsAuthenticated, AllowAny
 from rest_framework.response import Response
 from django_filters.rest_framework import DjangoFilterBackend
+from drf_spectacular.utils import extend_schema
 
 from config.exceptions import AppError
+from .auth import TRIAL_INSTITUTION_NAME
 from .models import User, Role, TeacherStudentRelation, Institution, Department
 from .serializers import (
     UserSerializer, UserCreateSerializer, UserUpdateSerializer,
@@ -196,3 +198,33 @@ class DepartmentViewSet(viewsets.ModelViewSet):
     filter_backends = [DjangoFilterBackend, filters.SearchFilter]
     filterset_fields = ['institution', 'category']
     search_fields = ['name']
+
+
+# ── 移动端机构列表（不分页，登录前可调用）─────────────────────────────────────
+
+@extend_schema(
+    summary='移动端机构列表（不分页）',
+    description='返回当前可选的全部机构，供移动端学生登录时选择所属机构。'
+                f'is_trial=true 标识预留试用机构（{TRIAL_INSTITUTION_NAME}）。',
+    responses={200: None},
+    tags=['机构'],
+)
+@api_view(['GET'])
+@permission_classes([AllowAny])
+def institution_list(request):
+    """移动端机构列表 — 全部机构、不分页"""
+    institutions = Institution.objects.all().order_by('name')
+    data = [
+        {
+            'id': inst.id,
+            'code': inst.code,
+            'name': inst.name,
+            'type': inst.type,
+            'level': inst.level,
+            'province': inst.province,
+            'city': inst.city,
+            'is_trial': inst.name == TRIAL_INSTITUTION_NAME,
+        }
+        for inst in institutions
+    ]
+    return Response(data)