chore: snapshot workflow migration progress

.gitignore

@@ -1,28 +1,32 @@
-node_modules/
 .env
 .env.local
 .DS_Store
 *.log
-# core dump files (not directories named 'core')
+.gstack/
+
+# Local scratch area managed by scripts/repo_hygiene.sh
+tmp/
+
+# Core dumps managed by scripts/repo_hygiene.sh
 /core
 /blender-renderer/core
+backend/core
 
-# Python cache
+# Python cache / environments managed by scripts/repo_hygiene.sh
 __pycache__/
 *.py[cod]
 *.pyo
-
-# Node / Vite build output
-dist/
-node_modules/
-
-# Celery beat schedule
+.venv/
+backend/.venv/
+.pytest_cache/
+.coverage
 celerybeat-schedule
 celerybeat.pid
 
-# Test cache
-.pytest_cache/
-.coverage
+# Frontend dependencies and build output
+node_modules/
+dist/
+frontend/dist/
 
 # IDE
 .vscode/
@@ -37,9 +41,7 @@ celerybeat.pid
 *.step
 *.stl
 *.xls
-+.xslx
 *.csv
 *.xlsx
 
 *.blend1
-backend/core