docs(readme): drop OneBrain Studio references (doesn't exist yet); fix webui badge (display_name=tag busts shields' stale-404 cache) (#18)

Author: kengio

README.md

@@ -21,7 +21,7 @@
   <a href="https://github.com/onebrain-ai/onebrain-webui/stargazers"><img alt="GitHub stars" src="https://img.shields.io/github/stars/onebrain-ai/onebrain-webui?style=for-the-badge&color=00f3ff&logo=github"></a>
 </p>
 <p align="center">
-  <a href="https://github.com/onebrain-ai/onebrain-webui/releases/latest"><img alt="webui release" src="https://img.shields.io/github/v/release/onebrain-ai/onebrain-webui?style=for-the-badge&logo=github&color=ff2d92&label=webui"></a>
+  <a href="https://github.com/onebrain-ai/onebrain-webui/releases/latest"><img alt="webui release" src="https://img.shields.io/github/v/release/onebrain-ai/onebrain-webui?display_name=tag&style=for-the-badge&logo=github&color=ff2d92&label=webui"></a>
   <a href="https://github.com/onebrain-ai/onebrain-cli/releases/latest"><img alt="onebrain daemon" src="https://img.shields.io/github/v/release/onebrain-ai/onebrain-cli?include_prereleases&style=for-the-badge&logo=rust&color=cb3837&label=onebrain%20daemon"></a>
   <a href="https://preactjs.com"><img alt="Built with Preact + Vite" src="https://img.shields.io/badge/Preact%20%2B%20Vite-bc13fe?style=for-the-badge&logo=preact&logoColor=white"></a>
   <a href="LICENSE-MIT"><img alt="License: MIT OR Apache-2.0" src="https://img.shields.io/badge/license-MIT%20OR%20Apache--2.0-7c3aed?style=for-the-badge"></a>
@@ -39,8 +39,6 @@ It **replaces and enhances Obsidian**: you don't need Obsidian installed to
 use OneBrain at full function. Everything the vault workflow needs lives
 here — reading and editing notes, wikilinks, an in-app webview for external
 links, PDF/Office/diagram previews, and the agent itself.
-[OneBrain Studio](https://github.com/onebrain-ai) (Tauri) wraps this same
-build as a native desktop app for extra performance.
 
 Built with **Preact + @preact/signals + Vite + TypeScript**. Talks to the
 **`onebrain` daemon** (`onebrain serve`) over a small JSON
@@ -59,7 +57,6 @@ daemon.
 - One **Panel contract** (`PanelDef.build(container, ctx)`) — panels authored once against a single surface-agnostic contract
 - Per-session **token** auth (daemon-injected `window.__ONEBRAIN_TOKEN__`, or `?token=` in dev)
 
-Next: [OneBrain Studio](https://github.com/onebrain-ai) (Tauri) for native performance.
 
 ## Develop