feat: add description field to boards and update related components for onboarding

backend/migrations/versions/c3b58a391f2e_add_boards_description.py

@@ -0,0 +1,37 @@
+"""Add description field to boards.
+
+Revision ID: c3b58a391f2e
+Revises: b308f2876359
+Create Date: 2026-02-11 00:00:00.000000
+
+"""
+
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "c3b58a391f2e"
+down_revision = "b308f2876359"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    """Add required board description column."""
+    op.add_column(
+        "boards",
+        sa.Column(
+            "description",
+            sa.String(),
+            nullable=False,
+            server_default="",
+        ),
+    )
+    op.alter_column("boards", "description", server_default=None)
+
+
+def downgrade() -> None:
+    """Remove board description column."""
+    op.drop_column("boards", "description")