feat: add interactive inbox view

internal/core/nodes/repository.go

@@ -169,6 +169,23 @@ func (r *Repository) ListRoots(includeDeleted bool) ([]Node, error) {
 	return scanNodes(rows)
 }
 
+// ListInboxRoots returns active root nodes that are not assigned to a specific section.
+func (r *Repository) ListInboxRoots(includeDeleted bool) ([]Node, error) {
+	q := `SELECT ` + nodeColumns + ` FROM nodes
+		WHERE parent_id IS NULL AND COALESCE(section, '') IN ('', 'inbox')`
+	if !includeDeleted {
+		q += " AND deleted_at IS NULL"
+	}
+	q += " ORDER BY updated_at DESC, sort_order, title"
+
+	rows, err := r.db.Query(q)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanNodes(rows)
+}
+
 // CountChildren returns the number of non-deleted children for a parent,
 // optionally filtered by one or more types.
 func (r *Repository) CountChildren(parentID string, types ...string) (int, error) {