feat(fase3): add agent status update and list endpoints

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/api-gateway/app/routers/auth.py

@@ -17,6 +17,7 @@ from app.schemas.auth import (
     TokenResponse,
     UserResponse,
     CreateUserRequest,
+    UpdateStatusRequest,
 )
 
 router = APIRouter(prefix="/auth", tags=["auth"])
@@ -94,3 +95,51 @@ def register_first_admin(request: CreateUserRequest, db: Session = Depends(get_d
     db.refresh(user)
 
     return UserResponse.model_validate(user)
+
+
+@router.put("/me/status")
+def update_my_status(
+    request: UpdateStatusRequest,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    current_user.status = request.status
+    db.commit()
+    return {"success": True, "status": request.status.value}
+
+
+@router.get("/agents")
+def list_agents(
+    db: Session = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+):
+    """List all agents with their status and conversation counts"""
+    from app.models.whatsapp import Conversation, ConversationStatus
+
+    agents = db.query(User).filter(User.is_active == True).all()
+    result = []
+
+    for agent in agents:
+        active_count = (
+            db.query(Conversation)
+            .filter(
+                Conversation.assigned_to == agent.id,
+                Conversation.status.in_(
+                    [ConversationStatus.ACTIVE, ConversationStatus.WAITING]
+                ),
+            )
+            .count()
+        )
+
+        result.append(
+            {
+                "id": str(agent.id),
+                "name": agent.name,
+                "email": agent.email,
+                "role": agent.role.value,
+                "status": agent.status.value,
+                "active_conversations": active_count,
+            }
+        )
+
+    return result

services/api-gateway/app/schemas/auth.py

@@ -43,3 +43,7 @@ class CreateUserRequest(BaseModel):
     password: str
     name: str
     role: UserRole = UserRole.AGENT
+
+
+class UpdateStatusRequest(BaseModel):
+    status: UserStatus