chore: ignore tmp_downloads directory to prevent large files

.gitignore

@@ -1,2 +1,21 @@
+# Python virtual environments
+/.venv/
+**/.venv/
+download-backend/.venv/
+
+# Python cache files
+__pycache__/
+**/__pycache__/
+*.py[cod]
+
+# Download artifacts
 download-backend/tmp_downloads/
+
+# Node/Next.js artifacts
+download-frontend/node_modules/
+download-frontend/.next/
+download-frontend/out/
+
+# OS miscellany
+.DS_Store
 download-backend/tmp_downloads/