feat: waiter domain + local IP tracking

- Site model: add waiter_domain and last_seen_local_ip columns
- HeartbeatRequest: accept optional local_ip field from local backend
- HeartbeatResponse: return waiter_domain to local backend
- heartbeat router: persist local_ip on each check-in
- SiteDetailPage: show Public IP / Local IP separately, add Waiter Domain
  card with inline edit modal

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cloud_backend/models/site.py

@@ -19,3 +19,5 @@ class Site(Base):
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     last_seen_at = Column(DateTime(timezone=True), nullable=True)
     last_seen_ip = Column(String, nullable=True)
+    last_seen_local_ip = Column(String, nullable=True)
+    waiter_domain = Column(String, nullable=True)

cloud_backend/routers/heartbeat.py

@@ -3,6 +3,7 @@ from fastapi import APIRouter, Depends, HTTPException, Header, Request, status
 from passlib.context import CryptContext
 from sqlalchemy.orm import Session
 
+from config import settings
 from database import get_db
 from models.site import Site
 from schemas.site import HeartbeatRequest, HeartbeatResponse
@@ -26,6 +27,8 @@ def heartbeat(
     now = datetime.now(timezone.utc)
     site.last_seen_at = now
     site.last_seen_ip = request.client.host if request.client else None
+    if body.local_ip:
+        site.last_seen_local_ip = body.local_ip
     db.commit()
 
     licensed = site.is_active and (site.license_expires_at.replace(tzinfo=timezone.utc) > now)
@@ -34,4 +37,6 @@ def heartbeat(
         locked=site.is_locked,
         lock_reason=site.lock_reason,
         expires_at=site.license_expires_at,
+        latest_version=settings.LATEST_VERSION,
+        waiter_domain=site.waiter_domain,
     )

cloud_backend/schemas/site.py

@@ -14,6 +14,7 @@ class SiteUpdate(BaseModel):
     owner_name: str | None = None
     contact_email: str | None = None
     license_expires_at: datetime | None = None
+    waiter_domain: str | None = None
 
 
 class SiteOut(BaseModel):
@@ -29,6 +30,8 @@ class SiteOut(BaseModel):
     created_at: datetime
     last_seen_at: datetime | None
     last_seen_ip: str | None
+    last_seen_local_ip: str | None
+    waiter_domain: str | None
 
     model_config = {"from_attributes": True}
 
@@ -44,6 +47,7 @@ class LockRequest(BaseModel):
 class HeartbeatRequest(BaseModel):
     version: str = "1.0.0"
     uptime_seconds: int = 0
+    local_ip: str | None = None
 
 
 class HeartbeatResponse(BaseModel):
@@ -51,3 +55,5 @@ class HeartbeatResponse(BaseModel):
     locked: bool
     lock_reason: str | None
     expires_at: datetime
+    latest_version: str | None = None
+    waiter_domain: str | None = None