fix: include line totals in aggregatedCosts message

Align extension->webview message contract with extended AggregatedCosts/SubtaskDetail (added/removed + totals), fixing check-types and enabling line deltas in UI.

packages/types/src/vscode-extension-host.ts

@@ -188,11 +188,19 @@ export interface ExtensionMessage {
 		totalCost: number
 		ownCost: number
 		childrenCost: number
+		ownAdded?: number
+		ownRemoved?: number
+		childrenAdded?: number
+		childrenRemoved?: number
+		totalAdded?: number
+		totalRemoved?: number
 		childDetails?: {
 			id: string
 			name: string
 			tokens: number
 			cost: number
+			added: number
+			removed: number
 			status: "active" | "completed" | "delegated"
 			hasNestedChildren: boolean
 		}[]

src/core/webview/ClineProvider.ts

@@ -1711,9 +1711,7 @@ export class ClineProvider
 		return {
 			historyItem,
 			aggregatedCosts: {
-				totalCost: aggregatedCosts.totalCost,
-				ownCost: aggregatedCosts.ownCost,
-				childrenCost: aggregatedCosts.childrenCost,
+				...aggregatedCosts,
 				childDetails,
 			},
 		}