🤖 docs: mark product as beta, Windows build as alpha (#904)

_Generated with `mux`_

- Updates README to reflect beta status (was preview)
- Marks Windows builds as alpha in install docs with issue reporting
callout

Author: ammar-agent

README.md

@@ -54,7 +54,7 @@ like [opportunistic compaction](https://mux.coder.com/context-management.html) a
 ## Install
 
 > [!WARNING]  
-> mux is in a Preview state. You will encounter bugs and performance issues.
+> mux is in Beta. You may encounter bugs and performance issues.
 > It's still possible to be highly productive. We are using it almost exclusively for our own development.
 
 Download pre-built binaries from [the releases page](https://github.com/coder/mux/releases) for

docs/install.md

@@ -8,7 +8,7 @@ Download pre-built binaries from [the releases page](https://github.com/coder/mu
 
 - **macOS**: Signed and notarized DMG (separate builds for Intel/Apple Silicon)
 - **Linux**: AppImage
-- **Windows**: Installer exe
+- **Windows** _(alpha)_: Installer exe
 
 ### Development Builds
 
@@ -47,13 +47,15 @@ The app is code-signed and notarized by Apple, so it will open without security
 2. Make it executable: `chmod +x Mux-*.AppImage`
 3. Run it: `./Mux-*.AppImage`
 
-**Windows:**
+**Windows** _(alpha)_:
 
 1. Download the installer exe from [releases](https://github.com/coder/mux/releases) (e.g., `mux-x.x.x-x64.exe`)
 2. Run the installer
 3. Follow the installation prompts
 4. Launch Mux from the Start menu or desktop shortcut
 
+> ⚠️ Windows support is currently in alpha. Please [report any issues](https://github.com/coder/mux/issues) you encounter.
+
 ### Testing Pre-Release Builds
 
 ⚠️ **Note**: Only builds from the `main` branch are signed and notarized. If you're testing a build from a pull request or other branch, you'll need to bypass macOS Gatekeeper: