Focus textarea when webview becomes visible; add getApiMetrics

src/providers/SidebarProvider.ts

@@ -41,6 +41,17 @@ export class SidebarProvider implements vscode.WebviewViewProvider {
 		// and executes code based on the message that is recieved
 		this.setWebviewMessageListener(webviewView.webview)
 
+		// Listen for when the panel becomes visible
+		// https://github.com/microsoft/vscode-discussions/discussions/840
+		webviewView.onDidChangeVisibility((e: any) => {
+			if (e.visible) {
+				// Your view is visible
+				this.postMessageToWebview({ type: "action", action: "didBecomeVisible"})
+			} else {
+				// Your view is hidden
+			}
+		})
+
 		// if the extension is starting a new session, clear previous task state
 		this.resetTask()
 	}

src/shared/ExtensionMessage.ts

@@ -4,7 +4,7 @@
 export interface ExtensionMessage {
     type: "action" | "state"
     text?: string
-    action?: "plusButtonTapped" | "settingsButtonTapped"
+    action?: "plusButtonTapped" | "settingsButtonTapped" | "didBecomeVisible"
     state?: { didOpenOnce: boolean, apiKey?: string, maxRequestsPerTask?: number, claudeMessages: ClaudeMessage[] }
 }