chore: clean junk files and normalize .gitignore

Remove .DS_Store/Thumbs.db, ensure node_modules/.DS_Store/Thumbs.db in .gitignore.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: amilkh

.gitignore

@@ -2,3 +2,8 @@ apitoken.txt
 fetchInfo.sh
 setenv.sh
 .env
+
+# auto-added by meta-ops
+node_modules/
+.DS_Store
+Thumbs.db