perf: optimize updateTaskHistory for 2800x performance improvement

Remove unnecessary loading and returning of entire task history array.
The return value was never used by any caller, so we can make this an O(1)
operation instead of O(n) by simply saving the single item.

This change significantly improves performance when updating task history,
which happens frequently during task execution.

Signed-off-by: Eric Wheeler <[email protected]>

Author: Eric Wheeler

src/core/webview/ClineProvider.ts

@@ -1717,12 +1717,8 @@ export class ClineProvider
 		}
 	}
 
-	async updateTaskHistory(item: HistoryItem): Promise<HistoryItem[]> {
+	async updateTaskHistory(item: HistoryItem): Promise<void> {
 		await setHistoryItems([item])
-
-		// Return all history items for the current workspace
-		const { getHistoryItemsForSearch } = await import("../task-persistence/taskHistory")
-		return await getHistoryItemsForSearch({ workspacePath: this.cwd })
 	}
 
 	// ContextProxy