chore(release): prepare v0.13.0-beta (#489)

- Bump version 0.12.0-beta -> 0.13.0-beta (src/vocalinux/version.py)
- README: refresh "What's New" for v0.13.0-beta and bump comparison table
- docs/UPDATE.md: add v0.13.0-beta section and bump checkout example
- SECURITY.md: mark 0.13.x supported, 0.12.x unsupported
- docs/RELEASE_PROCESS.md: add v0.13.0-beta to version history
- web: bump package.json / package-lock.json / page.tsx schema + badge
- web changelog: add v0.13.0-beta entry and refresh dateModified

docs/UPDATE.md

@@ -2,6 +2,42 @@
 
 This guide explains how to update Vocalinux to the latest version.
 
+## What's New in v0.13.0-beta
+
+### 🚀 Highlights
+
+| Feature | Description |
+|---------|-------------|
+| **🎙️ Guided Whisper Models** | Pick a whisper.cpp size and specialization (English-only, quantized, Turbo) with in-app guidance |
+| **🔌 Hotplug Keyboard Support** | Shortcuts keep working on keyboards connected after startup |
+| **✍️ Dictation Spacing** | Spacing preserved between speech segments separated by a pause in the same session |
+| **🖥️ Wayland Reliability** | Fixes silent text drops on wlroots/COSMIC compositors and garbled non-US-layout output |
+
+### ✨ New Features
+
+- **Guided whisper.cpp model variants** — The Settings dialog now splits whisper.cpp selection into **Model Size** and **Specialization**, exposing English-only, quantized (Q5/Q8), Large v3 Turbo, and legacy large models with language-aware recommendations and hover guidance. Exact model IDs (e.g. `medium.en-q5_0`, `large-v3-turbo`) can also be passed to `--model` (#465)
+
+### 🐛 Bug Fixes
+
+- **Dictation**: Preserve spacing between speech segments separated by a pause (#464)
+- **Shortcuts**: Rescan for hotplugged keyboards so shortcuts work on devices connected after startup (#467)
+- **KDE Plasma Wayland**: Detect KDE Plasma Wayland sessions and guide you to enable IBus Wayland when `wtype` injection fails (#466)
+- **Wayland**: Fix garbled output on non-US keyboard layouts and a clipboard-copy hang; ydotool now pastes through the clipboard (#480)
+- **Wayland/IBus**: Use wtype/ydotool instead of IBus on compositors that don't bridge IBus to native apps like COSMIC, Sway, and Hyprland (#486)
+- **Wayland/IBus**: Require a real IM engine on Wayland so a bare `xkb` layout no longer causes silent text drops on GNOME/Mutter and similar (#478)
+- **Wayland**: Preserve the keyboard layout on Wayland by not running `setxkbmap` (was flipping XWayland apps to `us`) (#474)
+- **UI**: Cap the settings dialog height on high-resolution displays (#465)
+
+### 🔧 Improvements
+
+- **Performance**: Faster ydotool text injection via an explicit `--key-delay` (#488)
+- **Website**: New documentation pages for Remote API, Silero VAD, advanced whisper.cpp settings, and desktop reliability (#470)
+- **CI**: Automatic pull-request labeling by changed files (#473)
+
+See the [full changelog](https://github.com/jatinkrmalik/vocalinux/releases/tag/v0.13.0-beta).
+
+---
+
 ## What's New in v0.12.0-beta
 
 ### 🚀 Highlights
@@ -202,7 +238,7 @@ The installer will:
 ```bash
 cd vocalinux
 git fetch origin
-git checkout v0.12.0-beta
+git checkout v0.13.0-beta
 ./install.sh
 ```