feat(postcard): profile country, country_from, per-user card number uniqueness, public page overhaul - Profile: add country field for default origin country - Postcard: add country_from field, auto-fill from profile.country on create - card_number uniqueness: change from global to per-user (profile_id + card_number) - Public pages: remove card_number display, only show cards with image_front - Public pages: show country as from→to format - Index page: no time display, add register button, fix lightbox with prev/next - Infinite scroll: add /api/public/cards endpoints and IntersectionObserver - Internal pages: update postcards list/detail for country_from display - i18n: add profiles.country_ph, pc_form.country_from, pc_detail.route

app/routers/api.py

@@ -81,13 +81,16 @@ def get_api_user_optional(
 
 class ProfileCreate(BaseModel):
     nickname: str
+    country: str | None = None
 
 class ProfileUpdate(BaseModel):
     nickname: str | None = None
+    country: str | None = None
 
 class ProfileOut(BaseModel):
     id: int
     nickname: str
+    country: str | None
     showcase_enabled: bool
     showcase_visible: str
     notes: str
@@ -101,6 +104,7 @@ class PostcardCreate(BaseModel):
     status: str
     recipient_name: str | None = None
     country: str | None = None
+    country_from: str | None = None
     send_time: str | None = None
     arrival_time: str | None = None
     sender_name: str | None = None
@@ -112,6 +116,7 @@ class PostcardUpdate(BaseModel):
     status: str | None = None
     recipient_name: str | None = None
     country: str | None = None
+    country_from: str | None = None
     send_time: str | None = None
     arrival_time: str | None = None
     sender_name: str | None = None
@@ -125,6 +130,7 @@ class PostcardOut(BaseModel):
     status: str
     recipient_name: str | None
     country: str | None
+    country_from: str | None
     send_time: datetime | None
     arrival_time: datetime | None
     sender_name: str | None
@@ -205,7 +211,8 @@ def create_profile(
     db: DbSession = Depends(get_db),
     ak: ApiKey = Depends(require_scopes(PERM_PROFILES_WRITE)),
 ):
-    p = Profile(nickname=body.nickname.strip(), user_id=ak.user_id)
+    c = body.country.strip().upper() if body.country else None
+    p = Profile(nickname=body.nickname.strip(), user_id=ak.user_id, country=c)
     db.add(p)
     db.commit()
     db.refresh(p)
@@ -231,6 +238,8 @@ def update_profile(
     p = _profile_or_404(ak.user, profile_id, db)
     if body.nickname is not None:
         p.nickname = body.nickname.strip()
+    if body.country is not None:
+        p.country = body.country.strip().upper() if body.country else None
     db.commit()
     db.refresh(p)
     return p
@@ -275,7 +284,10 @@ def create_postcard(
 ):
     _profile_or_404(ak.user, profile_id, db)
     cn = body.card_number.strip()
-    if db.query(Postcard).filter(Postcard.card_number == cn).first():
+    dup = db.query(Postcard).join(Profile).filter(
+        Postcard.card_number == cn, Profile.user_id == ak.user.id
+    ).first()
+    if dup:
         raise HTTPException(status_code=409, detail="Card number already exists")
     pc = Postcard(
         profile_id=profile_id,
@@ -283,6 +295,7 @@ def create_postcard(
         status=body.status,
         recipient_name=body.recipient_name,
         country=body.country.strip().upper() if body.country else None,
+        country_from=body.country_from.strip().upper() if body.country_from else None,
         send_time=_parse_date(body.send_time),
         arrival_time=_parse_date(body.arrival_time),
         sender_name=body.sender_name,
@@ -320,12 +333,17 @@ def update_postcard(
             setattr(pc, field, val.strip() if isinstance(val, str) else val)
     if body.card_number is not None:
         cn = body.card_number.strip()
-        dup = db.query(Postcard).filter(Postcard.card_number == cn, Postcard.id != postcard_id).first()
+        dup = db.query(Postcard).join(Profile).filter(
+            Postcard.card_number == cn, Postcard.id != postcard_id,
+            Profile.user_id == ak.user.id
+        ).first()
         if dup:
             raise HTTPException(status_code=409, detail="Card number already exists")
         pc.card_number = cn
     if body.country is not None:
         pc.country = body.country.strip().upper() if body.country else None
+    if body.country_from is not None:
+        pc.country_from = body.country_from.strip().upper() if body.country_from else None
     for field in ("send_time", "arrival_time", "receive_time"):
         val = getattr(body, field)
         if val is not None: