Feat: Kontaktformular im Impressum + /api/contact Endpoint ohne Auth (SW by-v986)

backend/routes/contact.py

@@ -0,0 +1,52 @@
+"""
+BAN YARO — Öffentliches Kontaktformular (kein Login erforderlich)
+Für Impressum-Kontaktpflicht nach § 5 DDG.
+"""
+
+from fastapi import APIRouter, Request
+from pydantic import BaseModel, EmailStr, Field
+from typing import Annotated
+
+from mailer import send_email, email_html
+from ratelimit import check as rl_check
+
+router = APIRouter()
+
+CONTACT_MAIL = "hallo@banyaro.app"
+
+
+class ContactIn(BaseModel):
+    name:    Annotated[str, Field(min_length=2, max_length=100)]
+    email:   EmailStr
+    subject: Annotated[str, Field(min_length=3, max_length=150)]
+    message: Annotated[str, Field(min_length=10, max_length=3000)]
+
+
+@router.post("")
+async def submit_contact(payload: ContactIn, request: Request):
+    rl_check(request, max_requests=3, window_seconds=3600, key=f"contact_{payload.email}")
+
+    body = f"""
+    <p style="margin:0 0 16px">Neue Kontaktanfrage über das Impressum-Formular:</p>
+    <table style="width:100%;border-collapse:collapse;font-size:13px;margin-bottom:20px">
+      <tr><td style="padding:6px 10px;background:#f5f0ea;font-weight:600;width:100px">Name</td>
+          <td style="padding:6px 10px;border-bottom:1px solid #eee">{payload.name}</td></tr>
+      <tr><td style="padding:6px 10px;background:#f5f0ea;font-weight:600">E-Mail</td>
+          <td style="padding:6px 10px;border-bottom:1px solid #eee">{payload.email}</td></tr>
+      <tr><td style="padding:6px 10px;background:#f5f0ea;font-weight:600">Betreff</td>
+          <td style="padding:6px 10px;border-bottom:1px solid #eee">{payload.subject}</td></tr>
+    </table>
+    <div style="background:#fdf6ef;border-left:4px solid #C4843A;padding:14px 16px;
+                border-radius:0 8px 8px 0;white-space:pre-wrap;font-size:14px;line-height:1.6">
+{payload.message}
+    </div>"""
+
+    plain = f"Kontakt von {payload.name} ({payload.email})\nBetreff: {payload.subject}\n\n{payload.message}"
+
+    await send_email(
+        CONTACT_MAIL,
+        f"Kontakt: {payload.subject} — {payload.name}",
+        email_html(body),
+        plain,
+    )
+    return {"ok": True}