fix: skip unknown status and priority on edit

src/model/taskStatus.ts

@@ -15,6 +15,11 @@ export type TaskStatusMeta = {
 	defaultHidden: boolean;
 	/** Codicon id for tree; adapters wrap in ThemeIcon. */
 	icon: string;
+	/**
+	 * Fallback value assigned when the parsed status is invalid/missing.
+	 * Excluded from editing choices; hidden in tree when empty.
+	 */
+	fallback?: boolean;
 };
 
 /** Explicit display / column order (not Object.values). */
@@ -57,6 +62,7 @@ export const TASK_STATUS_META: Record<TaskStatus, TaskStatusMeta> = {
 		label: "Unknown",
 		defaultHidden: true,
 		icon: "question",
+		fallback: true,
 	},
 };