Add notification when branch is auto-deleted after merge (#8377)

* Initial plan

* Initial plan: Add notification for branch auto-deletion after merge

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Add notification when branch is auto-deleted after merge

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Improve notification to handle both local and remote branch deletion

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Fix notification to only mention branch switch when branch was active

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Remove localized fallback for branch name in notification

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Simplify notification logic by removing isBranchActive check

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

* Copilot PR feedback

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

src/@types/vscode.proposed.chatSessionsProvider.d.ts

@@ -49,26 +49,6 @@ declare module 'vscode' {
 		 */
 		readonly onDidCommitChatSessionItem: Event<{ original: ChatSessionItem /** untitled */; modified: ChatSessionItem /** newly created */ }>;
 
-		/**
-		 * DEPRECATED: Will be removed!
-		 * Creates a new chat session.
-		 *
-		 * @param options Options for the new session including an optional initial prompt and history
-		 * @param token A cancellation token
-		 * @returns Metadata for the chat session
-		 */
-		provideNewChatSessionItem?(options: {
-			/**
-			 * The chat request that initiated the session creation
-			 */
-			readonly request: ChatRequest;
-
-			/**
-			 * Additional metadata to use for session creation
-			 */
-			metadata?: any;
-		}, token: CancellationToken): ProviderResult<ChatSessionItem>;
-
 		// #endregion
 	}
 
@@ -241,6 +221,14 @@ declare module 'vscode' {
 		 */
 		readonly onDidChangeChatSessionOptions?: Event<ChatSessionOptionChangeEvent>;
 
+		/**
+		 * Event that the provider can fire to signal that the available provider options have changed.
+		 *
+		 * When fired, the editor will re-query {@link ChatSessionContentProvider.provideChatSessionProviderOptions}
+		 * and update the UI to reflect the new option groups.
+		 */
+		readonly onDidChangeChatSessionProviderOptions?: Event<void>;
+
 		/**
 		 * Provides the chat session content for a given uri.
 		 *

src/github/pullRequestReviewCommon.ts

@@ -462,6 +462,30 @@ export namespace PullRequestReviewCommon {
 		}
 
 		// Execute all deletions in parallel
-		await performBranchDeletion(folderRepositoryManager, item, defaultBranch, branchInfo!, selectedActions);
+		const deletedBranchTypes = await performBranchDeletion(folderRepositoryManager, item, defaultBranch, branchInfo!, selectedActions);
+
+		// Show notification to the user about what was deleted
+		if (deletedBranchTypes.length > 0) {
+			const wasLocalDeleted = deletedBranchTypes.includes('local');
+			const wasRemoteDeleted = deletedBranchTypes.includes('remoteHead') || deletedBranchTypes.includes('remote');
+			const branchName = branchInfo?.branch || item.head?.ref;
+
+			// Only show notification if we have a branch name
+			if (branchName) {
+				if (wasLocalDeleted && wasRemoteDeleted) {
+					vscode.window.showInformationMessage(
+						vscode.l10n.t('Deleted local and remote branches for {0}.', branchName)
+					);
+				} else if (wasLocalDeleted) {
+					vscode.window.showInformationMessage(
+						vscode.l10n.t('Deleted local branch {0}.', branchName)
+					);
+				} else {
+					vscode.window.showInformationMessage(
+						vscode.l10n.t('Deleted remote branch {0}.', branchName)
+					);
+				}
+			}
+		}
 	}
 }