docs(readme): add image

Amolith created

Change summary

.readme-assets/2025-11-08.png         | 0 
.readme-assets/2025-11-08.png.license | 3 +++
README.md                             | 4 ++++
3 files changed, 7 insertions(+)

Detailed changes

README.md 🔗

@@ -15,6 +15,10 @@ Collaborative lists with real‑time voting and ranking. Create a room, share th
 [![Code: AGPL-3.0-or-later](https://img.shields.io/badge/Code-AGPL--3.0--or--later-blue)](LICENSES/AGPL-3.0-or-later.txt)
 [![Docs/assets: CC0-1.0](https://img.shields.io/badge/Docs%2Fassets-CC0--1.0-lightgrey)](LICENSES/CC0-1.0.txt)
 
+<p align="center">
+  <img src=".readme-assets/2025-11-08.png" alt="Sift screenshot: collaborative list with real-time votes" />
+</p>
+
 ## Why Sift?
 
 - Real‑time collaboration: everyone sees changes instantly