feat(worktree): normalize branch ref names when creating worktrees (#38)

Ensure that branch names containing forward or back slashes are properly normalized
by replacing them with hyphens. This prevents issues with invalid folder paths
when creating worktrees. Also improve error handling for null git folder selection.

Author: jackiotyu

src/core/command/addWorktreeCmd.ts

@@ -1,6 +1,6 @@
 import * as vscode from 'vscode';
 import { pickGitFolder } from '@/core/ui/pickGitFolder';
-import type { IWorktreeLess } from '@/types';
+import type { IWorktreeLess, IBranchForWorktree } from '@/types';
 import { Alert } from '@/core/ui/message';
 import { pickBranch } from '@/core/quickPick/pickBranch';
 import { createWorktreeFromInfo } from '@/core/command/createWorktreeFromInfo';
@@ -20,19 +20,22 @@ const pickBranchItem = async (dir: string, mainFolder: string) => {
     return branchItem;
 };
 
+const normalizeRefName = (branchItem: IBranchForWorktree) => (branchItem.branch || branchItem.hash || '').replace(/[\\/]/g, '-');
+
 export const addWorktreeCmd = async (item?: IWorktreeLess) => {
     let gitFolder =
         item?.fsPath || (await pickGitFolder(vscode.l10n.t('Select Git repository to create worktree from')));
-    if (gitFolder === null)
+    if (gitFolder === null) {
         Alert.showErrorMessage(vscode.l10n.t('Please open at least one Git repository in workspace'));
+    }
     if (!gitFolder) return false;
     const mainFolder = await getMainFolder(gitFolder);
     if (!mainFolder) return false;
 
     // Select ref
     let branchItem = await pickBranchItem(gitFolder, mainFolder);
     if (!branchItem) return false;
-    let refName = branchItem.branch || branchItem.hash;
+    let refName = normalizeRefName(branchItem);
 
     // Select folder
     let folderPath = await inputWorktreeDir({
@@ -46,7 +49,7 @@ export const addWorktreeCmd = async (item?: IWorktreeLess) => {
         // If no folder is selected, return to selecting ref
         branchItem = await pickBranchItem(gitFolder, mainFolder);
         if (!branchItem) return false;
-        refName = branchItem.branch || branchItem.hash;
+        refName = normalizeRefName(branchItem);
         folderPath = await inputWorktreeDir({
             baseDir: mainFolder,
             baseWorktreeDir: folderPath,