Initial commit: GoalsBreakDown web app

- Flask backend with TinyDB database
- Multi-user auth with bcrypt password hashing
- Goal CRUD with activation/deactivation and per-user limits
- Task CRUD with status tracking (todo/doing/pending/done)
- Focus rule: one doing task per goal
- Time picker-style scroll view with drag-and-drop reordering
- Admin panel for user management
- uv environment management

.gitignore

@@ -0,0 +1,28 @@
+# Database
+data/
+
+# Virtual environment
+.venv/
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+
+# uv
+uv.lock
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Environment variables
+.env
+.env.local