Add support for "from_name" field in email notifications

Introduced a new optional "from_name" attribute to email settings, allowing customization of the sender's display name in outgoing emails. Updated backend models, APIs, and front-end components to include and handle this field properly. This enhances email clarity and personalization for users.

backend/app/schemas/admin_settings.py

@@ -8,6 +8,7 @@ class EmailSettingsOut(BaseModel):
     smtp_host: str | None
     smtp_port: int
     smtp_username: str | None
+    from_name: str | None
     from_email: EmailStr | None
     use_starttls: bool
     use_ssl: bool
@@ -23,6 +24,7 @@ class EmailSettingsUpdate(BaseModel):
     smtp_username: str | None = None
     smtp_password: str | None = None
     clear_smtp_password: bool = False
+    from_name: str | None = None
     from_email: EmailStr | None = None
     use_starttls: bool = True
     use_ssl: bool = False