feat(telemetry): Integrate telemetry for expand-all, aggregate results

This commit implements AI usage telemetry for the `expand-all-tasks` command/tool and refactors its CLI output for clarity and consistency.

Key Changes:

1.  **Telemetry Integration for `expand-all-tasks` (Subtask 77.8):**\n    -   The `expandAllTasks` core logic (`scripts/modules/task-manager/expand-all-tasks.js`) now calls the `expandTask` function for each eligible task and collects the individual `telemetryData` returned.\n    -   A new helper function `_aggregateTelemetry` (in `utils.js`) is used to sum up token counts and costs from all individual expansions into a single `telemetryData` object for the entire `expand-all` operation.\n    -   The `expandAllTasksDirect` wrapper (`mcp-server/src/core/direct-functions/expand-all-tasks.js`) now receives and passes this aggregated `telemetryData` in the MCP response.\n    -   For CLI usage, `displayAiUsageSummary` is called once with the aggregated telemetry.

2.  **Improved CLI Output for `expand-all`:**\n    -   The `expandAllTasks` core function now handles displaying a final "Expansion Summary" box (showing Attempted, Expanded, Skipped, Failed counts) directly after the aggregated telemetry summary.\n    -   This consolidates all summary output within the core function for better flow and removes redundant logging from the command action in `scripts/modules/commands.js`.\n    -   The summary box border is green for success and red if any expansions failed.

3.  **Code Refinements:**\n    -   Ensured `chalk` and `boxen` are imported in `expand-all-tasks.js` for the new summary box.\n    -   Minor adjustments to logging messages for clarity.

scripts/modules/utils.js

@@ -508,6 +508,61 @@ function detectCamelCaseFlags(args) {
 	return camelCaseFlags;
 }
 
+/**
+ * Aggregates an array of telemetry objects into a single summary object.
+ * @param {Array<Object>} telemetryArray - Array of telemetryData objects.
+ * @param {string} overallCommandName - The name for the aggregated command.
+ * @returns {Object|null} Aggregated telemetry object or null if input is empty.
+ */
+function _aggregateTelemetry(telemetryArray, overallCommandName) {
+	if (!telemetryArray || telemetryArray.length === 0) {
+		return null;
+	}
+
+	const aggregated = {
+		timestamp: new Date().toISOString(), // Use current time for aggregation time
+		userId: telemetryArray[0].userId, // Assume userId is consistent
+		commandName: overallCommandName,
+		modelUsed: 'Multiple', // Default if models vary
+		providerName: 'Multiple', // Default if providers vary
+		inputTokens: 0,
+		outputTokens: 0,
+		totalTokens: 0,
+		totalCost: 0,
+		currency: telemetryArray[0].currency || 'USD' // Assume consistent currency or default
+	};
+
+	const uniqueModels = new Set();
+	const uniqueProviders = new Set();
+	const uniqueCurrencies = new Set();
+
+	telemetryArray.forEach((item) => {
+		aggregated.inputTokens += item.inputTokens || 0;
+		aggregated.outputTokens += item.outputTokens || 0;
+		aggregated.totalCost += item.totalCost || 0;
+		uniqueModels.add(item.modelUsed);
+		uniqueProviders.add(item.providerName);
+		uniqueCurrencies.add(item.currency || 'USD');
+	});
+
+	aggregated.totalTokens = aggregated.inputTokens + aggregated.outputTokens;
+	aggregated.totalCost = parseFloat(aggregated.totalCost.toFixed(6)); // Fix precision
+
+	if (uniqueModels.size === 1) {
+		aggregated.modelUsed = [...uniqueModels][0];
+	}
+	if (uniqueProviders.size === 1) {
+		aggregated.providerName = [...uniqueProviders][0];
+	}
+	if (uniqueCurrencies.size > 1) {
+		aggregated.currency = 'Multiple'; // Mark if currencies actually differ
+	} else if (uniqueCurrencies.size === 1) {
+		aggregated.currency = [...uniqueCurrencies][0];
+	}
+
+	return aggregated;
+}
+
 // Export all utility functions and configuration
 export {
 	LOG_LEVELS,
@@ -529,5 +584,6 @@ export {
 	isSilentMode,
 	resolveEnvVariable,
 	getTaskManager,
-	findProjectRoot
+	findProjectRoot,
+	_aggregateTelemetry
 };