feat: Add WSL support for Cursor CLI on Windows

- Add reusable WSL utilities in @automaker/platform (wsl.ts):
  - isWslAvailable() - Check if WSL is available on Windows
  - findCliInWsl() - Find CLI tools in WSL, tries multiple distributions
  - execInWsl() - Execute commands in WSL
  - createWslCommand() - Create spawn-compatible command/args for WSL
  - windowsToWslPath/wslToWindowsPath - Path conversion utilities
  - getWslDistributions() - List available WSL distributions

- Update CursorProvider to use WSL on Windows:
  - Detect cursor-agent in WSL distributions (prioritizes Ubuntu)
  - Use full path to wsl.exe for spawn() compatibility
  - Pass --cd flag for working directory inside WSL
  - Store and use WSL distribution for all commands
  - Show "(WSL:Ubuntu) /path" in installation status

- Add 'wsl' to InstallationStatus.method type

- Fix bugs:
  - Fix ternary in settings-view.tsx that always returned 'claude'
  - Fix findIndex -1 handling in WSL command construction
  - Remove 'gpt-5.2' from unknown models test (now valid Cursor model)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/components/views/settings-view.tsx

@@ -85,7 +85,7 @@ export function SettingsView() {
     switch (activeView) {
       case 'providers':
       case 'claude': // Backwards compatibility
-        return <ProviderTabs defaultTab={activeView === 'claude' ? 'claude' : 'claude'} />;
+        return <ProviderTabs defaultTab={activeView === 'claude' ? 'claude' : undefined} />;
       case 'ai-enhancement':
         return <AIEnhancementSection />;
       case 'appearance':