Initial commit: Happy Up monorepo through Sprint 5.

Document-driven MVP with FastAPI backend, Vue H5, WeChat mini shell, product demo, and Docker dev stack.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -0,0 +1,35 @@
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+.venv/
+venv/
+.env
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+htmlcov/
+.coverage
+
+# Node (future frontend packages)
+node_modules/
+dist/
+.next/
+
+# IDE / OS
+.idea/
+.vscode/
+.DS_Store
+*.swp
+
+# Logs & local data
+*.log
+logs/
+tmp/
+data/
+
+# Sprint 4 local uploads
+apps/api/data/
+
+# Docker volumes
+.docker/