fix: address review comments - use substring instead of deprecated substr, use Number() for type conversion

packages/types/src/code-snippet.ts

@@ -22,7 +22,7 @@ export interface CodeSnippet {
  * Creates a unique ID for a code snippet
  */
 export function createCodeSnippetId(): string {
-	return `snippet-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`
+	return `snippet-${Date.now()}-${Math.random().toString(36).substring(2, 11)}`
 }
 
 /**

src/core/webview/ClineProvider.ts

@@ -688,8 +688,8 @@ export class ClineProvider
 			const codeSnippet: CodeSnippet = {
 				id: createCodeSnippetId(),
 				filePath: params.filePath as string,
-				startLine: params.startLine as unknown as number,
-				endLine: params.endLine as unknown as number,
+				startLine: Number(params.startLine),
+				endLine: Number(params.endLine),
 				content: params.selectedText as string,
 				timestamp: Date.now(),
 			}