Fix CI: Install Wails CLI on all platforms for release builds

[vuon9]

Summary

Fixes the release build failure where wails command was not found on Windows and macOS runners.

Problem

The release workflow was failing on Windows with:

wails: command not found

This happened because Wails CLI was only being installed for Ubuntu (Linux) builds, but the build step tried to use wails on all platforms (Windows, macOS, and Linux).

Solution

• Separated the Linux-specific dependencies installation from Wails CLI installation
• Added a new step Install Wails CLI that runs on all platforms
• Handles platform-specific binary naming:
  • Windows: wails3.exe → wails.exe
  • macOS/Linux: wails3 → wails
• Adds the Go bin directory to PATH for Windows and macOS

Changes

• Modified .github/workflows/release.yml:
  • Renamed "Install dependencies" to "Install Linux dependencies" (Ubuntu only)
  • Added "Install Wails CLI" step (all platforms)
  • Properly handles binary renaming and PATH setup per platform

Testing

This fix ensures the release workflow can build successfully on:

• ✅ Ubuntu (Linux)
• ✅ Windows
• ✅ macOS

Fixes the release build failure for v0.9.1 and future releases.