Rewrite as uv-based Flask web app with Dockerfile

- Flask dashboard with Plotly charts (stores, monthly, hourly, weekday, heatmap)
- Spotify Wrapped-style summary with year dropdown and inflation toggle
- CSV upload flow (ephemeral, no storage)
- Homepage with upload and saved data options
- Import script for loading CSVs into SQLite
- Dockerized with gunicorn for production

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

pyproject.toml

@@ -0,0 +1,15 @@
+[project]
+name = "weakness"
+version = "0.1.0"
+description = "DoorDash spending dashboard"
+requires-python = ">=3.14"
+dependencies = [
+    "flask>=3.1.3",
+    "plotly>=6.6.0",
+    "numpy>=2.0",
+    "gunicorn>=25.1.0",
+]
+
+[project.scripts]
+weakness = "app:app.run"
+import-csv = "import_csv:main"