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/alembic/versions/0006_email_from_name.py

@@ -0,0 +1,23 @@
+"""add from_name to email settings
+
+Revision ID: 0006_email_from_name
+Revises: 0005_target_owners
+Create Date: 2026-02-12
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "0006_email_from_name"
+down_revision = "0005_target_owners"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("email_notification_settings", sa.Column("from_name", sa.String(length=255), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("email_notification_settings", "from_name")