fix: accept runtime archive root entry

src/main/nativeRuntime.test.ts

@@ -29,7 +29,7 @@ describe('Aurora Native runtime manifest', () => {
       })
     ).toThrow(/checksum/))
   it('rejects archive entries that escape the installation directory', () => {
-    expect(() => validateArchiveEntries('./runtime.json\n./bin/php\n')).not.toThrow()
+    expect(() => validateArchiveEntries('./\n./runtime.json\n./bin/php\n')).not.toThrow()
     expect(() => validateArchiveEntries('./runtime.json\n../outside\n')).toThrow(
       /Unsafe runtime archive entry/
     )

src/main/nativeRuntime.ts

@@ -117,8 +117,9 @@ export function validateArchiveEntries(output: string): void {
   if (!entries.length || entries.length > 50000)
     throw new Error('Runtime archive has an invalid file count.')
   for (const entry of entries) {
+    if (entry === '.' || entry === './') continue
     const normalized = entry.replace(/^\.\//, '')
-    if (!normalized || isAbsolute(normalized) || normalized.split('/').includes('..'))
+    if (!normalized || isAbsolute(normalized) || normalized.split(/[\\/]/).includes('..'))
       throw new Error(`Unsafe runtime archive entry: ${entry}`)
   }
 }