fix: handle empty workspaceFolders array to prevent path type error

- Fix getWorkspacePath() in src/utils/path.ts to check array length before accessing
- Fix getCwd() in FileContextTracker to check array length before accessing
- Fix cwd assignment in claude-code/run.ts to check array length before accessing

This prevents 'path argument must be of type string. Received an instance of Array' error
when workspaceFolders is an empty array.

Fixes #7695

Author: roomote

src/core/context-tracking/FileContextTracker.ts

@@ -37,7 +37,9 @@ export class FileContextTracker {
 
 	// Gets the current working directory or returns undefined if it cannot be determined
 	private getCwd(): string | undefined {
-		const cwd = vscode.workspace.workspaceFolders?.map((folder) => folder.uri.fsPath).at(0)
+		// Ensure we handle empty arrays properly - check length before accessing
+		const workspaceFolders = vscode.workspace.workspaceFolders
+		const cwd = workspaceFolders && workspaceFolders.length > 0 ? workspaceFolders[0].uri.fsPath : undefined
 		if (!cwd) {
 			console.info("No workspace folder available - cannot determine current working directory")
 		}

src/integrations/claude-code/run.ts

@@ -7,7 +7,9 @@ import { CLAUDE_CODE_DEFAULT_MAX_OUTPUT_TOKENS } from "@roo-code/types"
 import * as os from "os"
 import { t } from "../../i18n"
 
-const cwd = vscode.workspace.workspaceFolders?.map((folder) => folder.uri.fsPath).at(0)
+// Ensure we handle empty arrays properly - check length before accessing
+const workspaceFolders = vscode.workspace.workspaceFolders
+const cwd = workspaceFolders && workspaceFolders.length > 0 ? workspaceFolders[0].uri.fsPath : undefined
 
 // Claude Code installation URL - can be easily updated if needed
 const CLAUDE_CODE_INSTALLATION_URL = "https://docs.anthropic.com/en/docs/claude-code/setup"

src/utils/path.ts

@@ -107,7 +107,9 @@ export const toRelativePath = (filePath: string, cwd: string) => {
 }
 
 export const getWorkspacePath = (defaultCwdPath = "") => {
-	const cwdPath = vscode.workspace.workspaceFolders?.map((folder) => folder.uri.fsPath).at(0) || defaultCwdPath
+	// Ensure we handle empty arrays properly - check length before mapping
+	const workspaceFolders = vscode.workspace.workspaceFolders
+	const cwdPath = workspaceFolders && workspaceFolders.length > 0 ? workspaceFolders[0].uri.fsPath : defaultCwdPath
 	const currentFileUri = vscode.window.activeTextEditor?.document.uri
 	if (currentFileUri) {
 		const workspaceFolder = vscode.workspace.getWorkspaceFolder(currentFileUri)