Method handleFileChanged

src/utils/TaskManager.ts:166–202

* Handle file change - emit events for listeners

(file: TFile, cache: unknown)

	 * Handle file change - emit events for listeners
	 */
	private async handleFileChanged(file: TFile, cache: unknown): Promise<void> {
		let updatedTask: TaskInfo | null = null;
		let filterIndexChanged = false;

		if (cache && typeof cache === "object" && "frontmatter" in cache) {
			const frontmatter = (cache as { frontmatter?: unknown }).frontmatter;
			if (frontmatter && this.isTaskFile(frontmatter)) {
				const metadataTaskInfo = this.extractTaskInfoFromNative(file.path, frontmatter);
				const pendingTaskInfo = this.getPendingTaskInfo(file.path);
				if (
					pendingTaskInfo &&
					this.shouldUsePendingTaskInfo(pendingTaskInfo, metadataTaskInfo)
				) {
					updatedTask = pendingTaskInfo;
				} else {
					this.pendingTaskInfoByPath.delete(file.path);
					updatedTask = metadataTaskInfo;
				}
			} else {
				this.pendingTaskInfoByPath.delete(file.path);
			}
		}
		filterIndexChanged = this.updateFilterIndexesForFile(file.path, cache);

		// Emit both the generic file event and the task-specific event so rendered task cards
		// refresh when users edit task frontmatter directly in Obsidian.
		this.trigger("file-updated", { path: file.path, file, updatedTask, filterIndexChanged });
		if (updatedTask) {
			this.trigger(EVENT_TASK_UPDATED, {
				path: file.path,
				task: updatedTask,
				taskInfo: updatedTask,
				updatedTask,
			});
		}
		this.trigger("data-changed");
	}

	/**
	 * Handle file deletion