実装完了

作成・変更したファイル
バックエンド（新規）:

apps/mail/models.py — MailSender, MailEmail, MailNotificationToken
apps/mail/serializers.py
apps/mail/views.py — Windmill用API、フィードバック、ルール管理
apps/mail/urls.py
apps/mail/admin.py
マイグレーション（自動生成・適用済み）
バックエンド（変更）:

settings.py — apps.mail 追加、MAIL_API_KEY/FRONTEND_URL 環境変数
urls.py — /api/mail/ 追加
フロントエンド（新規）:

mail/feedback/[token]/page.tsx — 認証不要、フィードバック3択＋スコープ選択
mail/rules/page.tsx — ルール管理（一覧・追加・削除）
フロントエンド（変更）:

Navbar.tsx — 「メールルール」メニュー追加
types/index.ts — MailSender, MailEmailFeedback 型追加
次のステップ（Windmill側）
Keinaシステム側の実装は完了しています。次はWindmillにIMAPポーリングスクリプトを書く必要があります。Windmillのスクリプトが必要になったタイミングでお声がけください。

backend/apps/mail/admin.py

@@ -0,0 +1,23 @@
+from django.contrib import admin
+from .models import MailSender, MailEmail, MailNotificationToken
+
+
+@admin.register(MailSender)
+class MailSenderAdmin(admin.ModelAdmin):
+    list_display = ('__str__', 'rule', 'note', 'created_at')
+    list_filter = ('rule',)
+    search_fields = ('email', 'domain', 'note')
+
+
+@admin.register(MailEmail)
+class MailEmailAdmin(admin.ModelAdmin):
+    list_display = ('subject', 'sender_email', 'account', 'llm_verdict', 'feedback', 'received_at')
+    list_filter = ('account', 'llm_verdict', 'feedback')
+    search_fields = ('subject', 'sender_email', 'sender_domain')
+    readonly_fields = ('message_id', 'received_at', 'notified_at', 'feedback_at')
+
+
+@admin.register(MailNotificationToken)
+class MailNotificationTokenAdmin(admin.ModelAdmin):
+    list_display = ('token', 'email', 'created_at')
+    readonly_fields = ('token', 'created_at')

backend/apps/mail/migrations/0001_initial.py

@@ -0,0 +1,71 @@
+# Generated by Django 5.0 on 2026-02-22 00:20
+
+import django.db.models.deletion
+import uuid
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='MailEmail',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('account', models.CharField(choices=[('xserver', 'Xserver'), ('gmail', 'Gmail'), ('hotmail', 'Hotmail')], max_length=20, verbose_name='アカウント')),
+                ('message_id', models.CharField(max_length=500, unique=True, verbose_name='Message-ID')),
+                ('sender_email', models.EmailField(max_length=254, verbose_name='送信者アドレス')),
+                ('sender_domain', models.CharField(max_length=255, verbose_name='送信者ドメイン')),
+                ('subject', models.CharField(max_length=500, verbose_name='件名')),
+                ('body_preview', models.TextField(verbose_name='本文冒頭')),
+                ('received_at', models.DateTimeField(verbose_name='受信日時')),
+                ('llm_verdict', models.CharField(choices=[('important', '重要'), ('not_important', '重要でない')], max_length=20, verbose_name='LLM判定')),
+                ('notified_at', models.DateTimeField(blank=True, null=True, verbose_name='LINE通知日時')),
+                ('feedback', models.CharField(blank=True, choices=[('important', '重要だった'), ('not_important', '普通のメール'), ('never_notify', '今後通知しない')], max_length=20, null=True, verbose_name='フィードバック')),
+                ('feedback_at', models.DateTimeField(blank=True, null=True, verbose_name='フィードバック日時')),
+            ],
+            options={
+                'verbose_name': '受信メール',
+                'verbose_name_plural': '受信メール',
+                'ordering': ['-received_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='MailSender',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='メールアドレス')),
+                ('domain', models.CharField(blank=True, max_length=255, null=True, verbose_name='ドメイン')),
+                ('rule', models.CharField(choices=[('never_notify', '通知しない')], default='never_notify', max_length=20, verbose_name='ルール')),
+                ('note', models.TextField(blank=True, verbose_name='メモ')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'verbose_name': '送信者ルール',
+                'verbose_name_plural': '送信者ルール',
+            },
+        ),
+        migrations.CreateModel(
+            name='MailNotificationToken',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('token', models.UUIDField(default=uuid.uuid4, unique=True, verbose_name='トークン')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('email', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='notification_token', to='mail.mailemail', verbose_name='メール')),
+            ],
+            options={
+                'verbose_name': '通知トークン',
+                'verbose_name_plural': '通知トークン',
+            },
+        ),
+        migrations.AddConstraint(
+            model_name='mailsender',
+            constraint=models.CheckConstraint(check=models.Q(models.Q(('domain__isnull', True), ('email__isnull', False)), models.Q(('domain__isnull', False), ('email__isnull', True)), _connector='OR'), name='mail_sender_email_or_domain'),
+        ),
+    ]

backend/apps/mail/models.py

@@ -0,0 +1,99 @@
+import uuid
+from django.db import models
+
+
+class MailSender(models.Model):
+    """送信者ルール（never_notify: 通知しない）"""
+    email = models.EmailField(null=True, blank=True, verbose_name="メールアドレス")
+    domain = models.CharField(max_length=255, null=True, blank=True, verbose_name="ドメイン")
+    rule = models.CharField(
+        max_length=20,
+        choices=[('never_notify', '通知しない')],
+        default='never_notify',
+        verbose_name="ルール"
+    )
+    note = models.TextField(blank=True, verbose_name="メモ")
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        verbose_name = "送信者ルール"
+        verbose_name_plural = "送信者ルール"
+        constraints = [
+            models.CheckConstraint(
+                check=(
+                    models.Q(email__isnull=False, domain__isnull=True) |
+                    models.Q(email__isnull=True, domain__isnull=False)
+                ),
+                name='mail_sender_email_or_domain'
+            )
+        ]
+
+    def __str__(self):
+        value = self.email or self.domain
+        kind = "アドレス" if self.email else "ドメイン"
+        return f"[{kind}] {value}"
+
+
+ACCOUNT_CHOICES = [
+    ('xserver', 'Xserver'),
+    ('gmail', 'Gmail'),
+    ('hotmail', 'Hotmail'),
+]
+
+FEEDBACK_CHOICES = [
+    ('important', '重要だった'),
+    ('not_important', '普通のメール'),
+    ('never_notify', '今後通知しない'),
+]
+
+
+class MailEmail(models.Model):
+    """受信メール記録（LLMに渡したメール）"""
+    account = models.CharField(max_length=20, choices=ACCOUNT_CHOICES, verbose_name="アカウント")
+    message_id = models.CharField(max_length=500, unique=True, verbose_name="Message-ID")
+    sender_email = models.EmailField(verbose_name="送信者アドレス")
+    sender_domain = models.CharField(max_length=255, verbose_name="送信者ドメイン")
+    subject = models.CharField(max_length=500, verbose_name="件名")
+    body_preview = models.TextField(verbose_name="本文冒頭")
+    received_at = models.DateTimeField(verbose_name="受信日時")
+    llm_verdict = models.CharField(
+        max_length=20,
+        choices=[('important', '重要'), ('not_important', '重要でない')],
+        verbose_name="LLM判定"
+    )
+    notified_at = models.DateTimeField(null=True, blank=True, verbose_name="LINE通知日時")
+    feedback = models.CharField(
+        max_length=20,
+        choices=FEEDBACK_CHOICES,
+        null=True, blank=True,
+        verbose_name="フィードバック"
+    )
+    feedback_at = models.DateTimeField(null=True, blank=True, verbose_name="フィードバック日時")
+
+    class Meta:
+        verbose_name = "受信メール"
+        verbose_name_plural = "受信メール"
+        ordering = ['-received_at']
+
+    def __str__(self):
+        return f"{self.subject} ({self.sender_email})"
+
+
+class MailNotificationToken(models.Model):
+    """LINEフィードバックURL用トークン（有効期限なし）"""
+    email = models.OneToOneField(
+        MailEmail,
+        on_delete=models.CASCADE,
+        related_name='notification_token',
+        verbose_name="メール"
+    )
+    token = models.UUIDField(default=uuid.uuid4, unique=True, verbose_name="トークン")
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        verbose_name = "通知トークン"
+        verbose_name_plural = "通知トークン"
+
+    def __str__(self):
+        return str(self.token)

backend/apps/mail/serializers.py

@@ -0,0 +1,42 @@
+from rest_framework import serializers
+from .models import MailSender, MailEmail
+
+
+class MailSenderSerializer(serializers.ModelSerializer):
+    type = serializers.SerializerMethodField()
+
+    class Meta:
+        model = MailSender
+        fields = ['id', 'type', 'email', 'domain', 'rule', 'note', 'created_at']
+
+    def get_type(self, obj):
+        return 'address' if obj.email else 'domain'
+
+    def validate(self, data):
+        email = data.get('email')
+        domain = data.get('domain')
+        if not email and not domain:
+            raise serializers.ValidationError("email または domain のどちらかを指定してください")
+        if email and domain:
+            raise serializers.ValidationError("email と domain を同時に指定することはできません")
+        return data
+
+
+class MailEmailCreateSerializer(serializers.ModelSerializer):
+    """Windmill からの POST 用"""
+    class Meta:
+        model = MailEmail
+        fields = [
+            'account', 'message_id', 'sender_email', 'sender_domain',
+            'subject', 'body_preview', 'received_at', 'llm_verdict'
+        ]
+
+
+class FeedbackDetailSerializer(serializers.ModelSerializer):
+    """フィードバックページ表示用"""
+    class Meta:
+        model = MailEmail
+        fields = [
+            'id', 'sender_email', 'sender_domain', 'subject',
+            'body_preview', 'received_at', 'feedback'
+        ]

backend/apps/mail/urls.py

@@ -0,0 +1,19 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from . import views
+
+router = DefaultRouter()
+router.register(r'senders', views.MailSenderViewSet, basename='mail-sender')
+
+urlpatterns = [
+    # Windmill向けAPI（APIキー認証）
+    path('sender-rule/', views.SenderRuleView.as_view(), name='mail-sender-rule'),
+    path('sender-context/', views.SenderContextView.as_view(), name='mail-sender-context'),
+    path('emails/', views.MailEmailCreateView.as_view(), name='mail-email-create'),
+
+    # フィードバック（認証不要、UUIDトークン）
+    path('feedback/<uuid:token>/', views.FeedbackView.as_view(), name='mail-feedback'),
+
+    # ルール管理（JWT認証）
+    path('', include(router.urls)),
+]

backend/apps/mail/views.py

@@ -0,0 +1,204 @@
+import secrets
+from django.conf import settings
+from django.shortcuts import get_object_or_404
+from django.utils import timezone
+from rest_framework import viewsets, permissions, status
+from rest_framework.views import APIView
+from rest_framework.response import Response
+from rest_framework.permissions import BasePermission, AllowAny, IsAuthenticated
+from django.db.models import Count, Q
+
+from .models import MailSender, MailEmail, MailNotificationToken
+from .serializers import (
+    MailSenderSerializer,
+    MailEmailCreateSerializer,
+    FeedbackDetailSerializer,
+)
+
+
+class MailAPIKeyPermission(BasePermission):
+    """X-API-Key ヘッダーで認証（Windmill向け）"""
+
+    def has_permission(self, request, view):
+        key = request.headers.get('X-API-Key', '')
+        expected = getattr(settings, 'MAIL_API_KEY', '')
+        if not key or not expected:
+            return False
+        return secrets.compare_digest(key, expected)
+
+
+# ---------------------------------------------------------------------------
+# Windmill 向け API（APIキー認証）
+# ---------------------------------------------------------------------------
+
+class SenderRuleView(APIView):
+    """
+    GET /api/mail/sender-rule/?email=...&domain=...
+    送信者ルールを確認する（アドレス優先 > ドメイン優先）
+    """
+    permission_classes = [MailAPIKeyPermission]
+    authentication_classes = []
+
+    def get(self, request):
+        email = request.query_params.get('email', '')
+        domain = request.query_params.get('domain', '')
+
+        # アドレスルールを先に確認（具体的なほど優先）
+        if email:
+            sender = MailSender.objects.filter(email=email).first()
+            if sender:
+                return Response({
+                    'matched': True,
+                    'rule': sender.rule,
+                    'match_type': 'address',
+                })
+
+        # ドメインルールを確認
+        if domain:
+            sender = MailSender.objects.filter(domain=domain).first()
+            if sender:
+                return Response({
+                    'matched': True,
+                    'rule': sender.rule,
+                    'match_type': 'domain',
+                })
+
+        return Response({'matched': False})
+
+
+class SenderContextView(APIView):
+    """
+    GET /api/mail/sender-context/?email=...&domain=...
+    LLM用フィードバック集計を返す（トークン肥大化防止のため集計値のみ）
+    """
+    permission_classes = [MailAPIKeyPermission]
+    authentication_classes = []
+
+    def get(self, request):
+        email = request.query_params.get('email', '')
+        domain = request.query_params.get('domain', '')
+
+        # アドレスで絞り込み（なければドメインで絞り込み）
+        if email:
+            qs = MailEmail.objects.filter(sender_email=email)
+        elif domain:
+            qs = MailEmail.objects.filter(sender_domain=domain)
+        else:
+            return Response({
+                'total_notified': 0,
+                'important': 0,
+                'not_important': 0,
+                'never_notify': 0,
+                'no_feedback': 0,
+            })
+
+        total = qs.count()
+        important = qs.filter(feedback='important').count()
+        not_important = qs.filter(feedback='not_important').count()
+        never_notify = qs.filter(feedback='never_notify').count()
+        no_feedback = qs.filter(feedback__isnull=True).count()
+
+        return Response({
+            'total_notified': total,
+            'important': important,
+            'not_important': not_important,
+            'never_notify': never_notify,
+            'no_feedback': no_feedback,
+        })
+
+
+class MailEmailCreateView(APIView):
+    """
+    POST /api/mail/emails/
+    メールを記録する。llm_verdict == 'important' の場合はトークンも発行する。
+    """
+    permission_classes = [MailAPIKeyPermission]
+    authentication_classes = []
+
+    def post(self, request):
+        serializer = MailEmailCreateSerializer(data=request.data)
+        if not serializer.is_valid():
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+        mail_email = serializer.save()
+        response_data = {'id': mail_email.id}
+
+        if mail_email.llm_verdict == 'important':
+            token_obj = MailNotificationToken.objects.create(email=mail_email)
+            mail_email.notified_at = timezone.now()
+            mail_email.save(update_fields=['notified_at'])
+
+            frontend_url = getattr(settings, 'FRONTEND_URL', 'http://localhost:3000')
+            response_data['feedback_url'] = f"{frontend_url}/mail/feedback/{token_obj.token}"
+
+        return Response(response_data, status=status.HTTP_201_CREATED)
+
+
+# ---------------------------------------------------------------------------
+# フィードバックビュー（認証不要）
+# ---------------------------------------------------------------------------
+
+class FeedbackView(APIView):
+    """
+    GET  /api/mail/feedback/<token>/  メール情報と現在のフィードバックを返す
+    POST /api/mail/feedback/<token>/  フィードバックを保存する
+    """
+    permission_classes = [AllowAny]
+    authentication_classes = []
+
+    def _get_mail_email(self, token):
+        token_obj = get_object_or_404(MailNotificationToken, token=token)
+        return token_obj.email
+
+    def get(self, request, token):
+        mail_email = self._get_mail_email(token)
+        serializer = FeedbackDetailSerializer(mail_email)
+        return Response(serializer.data)
+
+    def post(self, request, token):
+        mail_email = self._get_mail_email(token)
+
+        feedback = request.data.get('feedback')
+        valid_feedbacks = ['important', 'not_important', 'never_notify']
+        if feedback not in valid_feedbacks:
+            return Response(
+                {'error': f'feedback は {valid_feedbacks} のいずれかを指定してください'},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+
+        # フィードバックを更新（再選択も可能）
+        mail_email.feedback = feedback
+        mail_email.feedback_at = timezone.now()
+        mail_email.save(update_fields=['feedback', 'feedback_at'])
+
+        # 「今後通知しない」の場合、送信者ルールを作成/更新
+        if feedback == 'never_notify':
+            scope = request.data.get('scope')  # 'address' or 'domain'
+            if scope == 'address':
+                MailSender.objects.update_or_create(
+                    email=mail_email.sender_email,
+                    defaults={'domain': None, 'rule': 'never_notify'}
+                )
+            elif scope == 'domain':
+                MailSender.objects.update_or_create(
+                    domain=mail_email.sender_domain,
+                    defaults={'email': None, 'rule': 'never_notify'}
+                )
+
+        return Response({'status': 'ok'})
+
+
+# ---------------------------------------------------------------------------
+# ルール管理（JWT認証）
+# ---------------------------------------------------------------------------
+
+class MailSenderViewSet(viewsets.ModelViewSet):
+    """
+    GET    /api/mail/senders/       ルール一覧
+    POST   /api/mail/senders/       ルール追加
+    DELETE /api/mail/senders/{id}/  ルール削除
+    """
+    queryset = MailSender.objects.all().order_by('-created_at')
+    serializer_class = MailSenderSerializer
+    permission_classes = [IsAuthenticated]
+    http_method_names = ['get', 'post', 'delete', 'head', 'options']