feat: update UI to glassmorphic design and copper theme

backend/app/api/forms.py

@@ -0,0 +1,42 @@
+"""انتهای فرم‌ها — ثبت پیام تماس و عضویت در خبرنامه."""
+
+from fastapi import APIRouter, Depends
+from sqlalchemy.orm import Session
+
+from ..database import get_db
+from .. import models
+from ..schemas import ContactIn, ContactMessageOut, NewsletterIn, SubscriberOut
+
+router = APIRouter()
+
+
+@router.post("/contact", response_model=ContactMessageOut, status_code=201)
+def submit_contact(payload: ContactIn, db: Session = Depends(get_db)):
+    message = models.ContactMessage(
+        name=payload.name.strip(),
+        phone=payload.phone.strip(),
+        note=payload.note.strip(),
+    )
+    db.add(message)
+    db.commit()
+    db.refresh(message)
+    return message
+
+
+@router.post("/newsletter", response_model=SubscriberOut, status_code=201)
+def subscribe(payload: NewsletterIn, db: Session = Depends(get_db)):
+    email = str(payload.email).lower()
+    subscriber = db.query(models.Subscriber).filter(models.Subscriber.email == email).first()
+
+    if subscriber is not None:
+        if not subscriber.is_active:
+            subscriber.is_active = True
+            db.commit()
+            db.refresh(subscriber)
+        return subscriber
+
+    subscriber = models.Subscriber(email=email)
+    db.add(subscriber)
+    db.commit()
+    db.refresh(subscriber)
+    return subscriber