Polish store and v2rayA app for release

- Redesign store README as a minimal storefront

- Refine app README and remove technical clutter

- Update Sphera icon with refined vector styling

- Use original v2rayA app icon

- Use raw GitHub URL for v2rayA icon per Umbrel Community Store spec

- Add custom v2rayA image build for UmbrelOS nf_tables iptables

sphera-v2raya/README.md

@@ -0,0 +1,49 @@
+<p align="center">
+  <img src="icon.png" width="96" height="96" alt="v2rayA">
+</p>
+
+<h1 align="center">v2rayA</h1>
+
+<p align="center">
+  Web GUI for Project V — <em>V2Ray · Xray · Shadowsocks · Trojan</em>
+</p>
+
+<p align="center">
+  <a href="https://github.com/v2rayA/v2rayA/releases"><img src="https://img.shields.io/badge/version-v2.4.9-blue?style=for-the-badge" alt="Version"></a>
+  <a href="https://hub.docker.com/r/mzz2017/v2raya"><img src="https://img.shields.io/badge/docker-mzz2017/v2raya-2496ED?style=for-the-badge&logo=docker" alt="Docker"></a>
+</p>
+
+---
+
+## Features
+
+- **Transparent proxy** out of the box (host network mode)
+- **Web GUI** for servers, subscriptions and routing rules
+- **Multi-protocol**: VMess, VLESS, Shadowsocks, SSR, Trojan, Tuic, Juicity
+- **SOCKS5** (`10808`) and **HTTP** (`10809`) proxies exposed on the host
+
+---
+
+## First run
+
+1. Open v2rayA from Umbrel Home.
+2. Create an admin account on first login.
+3. Add servers via **Subscriptions** or **Servers → Import**.
+4. Select a server and click **Connect**.
+5. Enable **Transparent Proxy / System Proxy** if needed.
+
+---
+
+## Ports
+
+| Service | Port |
+|---|---|
+| Web GUI | `2017` |
+| SOCKS5 | `10808` |
+| HTTP | `10809` |
+
+---
+
+<p align="center">
+  Part of <a href="../"><b>Sphera Community App Store</b></a>
+</p>