Improves error handling for authentication in launchpad

Enhances the launchpad error display by detecting authentication errors and providing a clearer, actionable message with options to reconnect integrations directly from the UI. Aggregates multiple errors to surface the most relevant cause and streamlines error item creation for consistency.

Improves user experience by making it easier to resolve integration authentication issues.
(#4492, #4748)

Author: sergeibbb

src/plus/launchpad/launchpad.ts

@@ -41,6 +41,7 @@ import type { IntegrationIds } from '../../constants.integrations';
 import { GitCloudHostIntegrationId, GitSelfManagedHostIntegrationId } from '../../constants.integrations';
 import type { LaunchpadTelemetryContext, Source, Sources, TelemetryEvents } from '../../constants.telemetry';
 import type { Container } from '../../container';
+import { AuthenticationError } from '../../errors';
 import type { QuickPickItemOfT } from '../../quickpicks/items/common';
 import { createQuickPickItemOfT, createQuickPickSeparator } from '../../quickpicks/items/common';
 import type { DirectiveQuickPickItem } from '../../quickpicks/items/directive';
@@ -53,6 +54,7 @@ import { getScopedCounter } from '../../system/counter';
 import { fromNow } from '../../system/date';
 import { some } from '../../system/iterable';
 import { Logger } from '../../system/logger';
+import { AggregateError } from '../../system/promise';
 import { interpolate, pluralize } from '../../system/string';
 import { ProviderBuildStatusState, ProviderPullRequestReviewState } from '../integrations/providers/models';
 import type { LaunchpadCategorizedResult, LaunchpadItem } from './launchpadProvider';
@@ -571,7 +573,7 @@ export class LaunchpadCommand extends QuickCommand<State> {
 			return groupedAndSorted;
 		};
 
-		function getItemsAndQuickpickProps(isFiltering?: boolean) {
+		const getItemsAndQuickpickProps = (isFiltering?: boolean) => {
 			const result = context.inSearch ? context.searchResult : context.result;
 
 			if (result?.error != null && !result?.items?.length) {
@@ -625,18 +627,7 @@ export class LaunchpadCommand extends QuickCommand<State> {
 
 			// Add error information item if there's an error but items were still loaded
 			const errorItem: DirectiveQuickPickItem | undefined =
-				result?.error != null
-					? createDirectiveQuickPickItem(Directive.Noop, false, {
-							label: '$(warning) Unable to fully load items',
-							detail:
-								result.error.name === 'HttpError' &&
-								'status' in result.error &&
-								typeof result.error.status === 'number'
-									? `${result.error.status}: ${String(result.error)}`
-									: String(result.error),
-							buttons: [OpenLogsQuickInputButton],
-						})
-					: undefined;
+				result?.error != null ? this.createErrorQuickPickItem(result.error) : undefined;
 
 			const hasPicked = items.some(i => i.picked);
 			if (context.inSearch === 'mode') {
@@ -677,7 +668,7 @@ export class LaunchpadCommand extends QuickCommand<State> {
 							...getLaunchpadQuickPickItems(result.items, isFiltering),
 						],
 			};
-		}
+		};
 
 		const updateItems = async (
 			quickpick: QuickPick<
@@ -863,6 +854,11 @@ export class LaunchpadCommand extends QuickCommand<State> {
 					return;
 				}
 
+				if (button === ConnectIntegrationButton) {
+					await this.container.integrations.manageCloudIntegrations({ source: 'launchpad' });
+					return;
+				}
+
 				if (!item) return;
 
 				switch (button) {
@@ -1436,6 +1432,25 @@ export class LaunchpadCommand extends QuickCommand<State> {
 			this.source,
 		);
 	}
+
+	private createErrorQuickPickItem(error: Error): DirectiveQuickPickItem {
+		if (error instanceof AggregateError) {
+			const firstAuthError = error.errors.find(e => e instanceof AuthenticationError);
+			error = firstAuthError ?? error.errors[0] ?? error;
+		}
+
+		const isAuthError = error instanceof AuthenticationError;
+
+		return createDirectiveQuickPickItem(Directive.Noop, false, {
+			label: isAuthError ? '$(warning) Authentication Required' : '$(warning) Unable to fully load items',
+			detail: isAuthError
+				? `${String(error)} — Click to reconnect your integration`
+				: error.name === 'HttpError' && 'status' in error && typeof error.status === 'number'
+					? `${error.status}: ${String(error)}`
+					: String(error),
+			buttons: isAuthError ? [ConnectIntegrationButton, OpenLogsQuickInputButton] : [OpenLogsQuickInputButton],
+		});
+	}
 }
 
 function getLaunchpadItemInformationRows(