better gitignore

src/main/fs-service.ts

@@ -1,4 +1,4 @@
-import { readdir, readFile, stat, writeFile } from 'node:fs/promises'
+import { readdir, readFile, rm, stat, writeFile } from 'node:fs/promises'
 import { join, relative, sep } from 'node:path'
 import { listFiles } from './search-service'
 
@@ -120,6 +120,13 @@ export async function writeProjectFile(root: string, rel: string, content: strin
   await writeFile(join(root, rel), content, 'utf8')
 }
 
+/** Delete a project file or folder (relative path). Stays inside the project root. */
+export async function deleteProjectFile(root: string, rel: string): Promise<void> {
+  const target = join(root, rel)
+  if (relative(root, target).startsWith('..')) return // guard against escaping the root
+  await rm(target, { recursive: true, force: true })
+}
+
 /**
  * In-memory content index of all (small, text) files — powers content viewing.
  * Primary: read the rg file list; fallback: walk. Capped for large repos.