fix: to streamlit compatible pip style entry

Author: EugeneSim

README.md

@@ -55,7 +55,7 @@ Then: `make test` · `hdb-download -o data/raw/hdb_resale_2017_onwards.csv` (or
 ## Live demo (two URLs)
 
 - **GitHub Pages** (static report only): enable [`.github/workflows/publish-quarto.yml`](.github/workflows/publish-quarto.yml) and set **Settings → Pages** to **GitHub Actions**. URL shape: `https://<user>.github.io/<repo>/`.
-- **Streamlit Community Cloud** (interactive app): main file `streamlit_app.py`; use [`packages.txt`](packages.txt) or `pip install -e .`. Set secrets in the Cloud UI (e.g. `DATA_GOV_SG_API_KEY`) as in [`.streamlit/secrets.toml.example`](.streamlit/secrets.toml.example). List the Cloud app URL in this README next to the Pages URL.
+- **Streamlit Community Cloud** (interactive app): main file `streamlit_app.py`; Python dependencies are in [`requirements.txt`](requirements.txt) (`-e .`) and project metadata in [`pyproject.toml`](pyproject.toml). Set secrets in the Cloud UI (e.g. `DATA_GOV_SG_API_KEY`) as in [`.streamlit/secrets.toml.example`](.streamlit/secrets.toml.example). List the Cloud app URL in this README next to the Pages URL.
 
 ### Publish checklist (GitHub Pages + Streamlit Cloud)
 

packages.txt

@@ -1,14 +1,3 @@
-# Streamlit Community Cloud: pin to pyproject or `pip install -e .`
-# https://docs.streamlit.io/streamlit-community-cloud/deploy-your-app
-pandas>=2.2,<3
-numpy>=1.26,<3
-plotly>=5.24,<6
-streamlit>=1.40,<2
-streamlit-folium>=0.24,<1
-folium>=0.18,<1
-scipy>=1.14,<2
-statsmodels>=0.14,<1
-pyarrow>=18,<20
-requests>=2.32,<3
-networkx>=3.2,<4
-scikit-learn>=1.5,<2
+# Apt packages for Streamlit Community Cloud.
+# Keep this file for system dependencies only.
+# Python dependencies belong in requirements.txt / pyproject.toml.

requirements.txt

@@ -0,0 +1 @@
+-e .