Added a feature to clean compleeted tasks either Never, 24 hours, 7 days or 30 days

main.ts

@@ -32,6 +32,14 @@ export default class TaskWeaverPlugin extends Plugin {
 		this.app.workspace.onLayoutReady(() => {
 			this.activateView();
 		});
+
+		// Clean up old completed tasks on startup
+		await this.cleanupCompletedTasks();
+
+		// Clean up old completed tasks every hour
+		this.registerInterval(
+			window.setInterval(() => this.cleanupCompletedTasks(), 60 * 60 * 1000)
+		);
 	}
 
 	async onunload(): Promise<void> {
@@ -180,4 +188,39 @@ export default class TaskWeaverPlugin extends Plugin {
 		}
 		return elapsed;
 	}
+
+	async cleanupCompletedTasks(): Promise<void> {
+		if (this.settings.completedTaskRetention === "never") {
+			return;
+		}
+
+		const now = Date.now();
+		let retentionMs: number;
+
+		switch (this.settings.completedTaskRetention) {
+			case "1day":
+				retentionMs = 24 * 60 * 60 * 1000;
+				break;
+			case "7days":
+				retentionMs = 7 * 24 * 60 * 60 * 1000;
+				break;
+			case "30days":
+				retentionMs = 30 * 24 * 60 * 60 * 1000;
+				break;
+			default:
+				return;
+		}
+
+		const initialCount = this.settings.tasks.length;
+		this.settings.tasks = this.settings.tasks.filter(task => {
+			if (!task.completed || !task.completedAt) {
+				return true;
+			}
+			return (now - task.completedAt) < retentionMs;
+		});
+
+		if (this.settings.tasks.length !== initialCount) {
+			await this.saveSettings();
+		}
+	}
 }