Replace EmailStr with custom email validation to avoid dependency issues

app/schemas/user.py

@@ -1,20 +1,32 @@
 from typing import Optional
-
+import re
-from pydantic import BaseModel, EmailStr
+from pydantic import BaseModel, field_validator
 
 from app.models.user import UserRole
 
+# Remove EmailStr import and use custom validation instead
+
 
 # Shared properties
 class UserBase(BaseModel):
-    email: Optional[EmailStr] = None
+    email: Optional[str] = None
     is_active: Optional[bool] = True
     role: Optional[UserRole] = None
     
+    @field_validator('email')
+    @classmethod
+    def validate_email(cls, v):
+        if v is None:
+            return v
+        pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+        if not re.match(pattern, v):
+            raise ValueError('Invalid email format')
+        return v
+
 
 # Properties to receive via API on creation
 class UserCreate(UserBase):
-    email: EmailStr
+    email: str
     password: str
     role: UserRole = UserRole.USER