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/server/tests/unit/lib/model-resolver.test.ts

@@ -42,7 +42,8 @@ describe('model-resolver.ts', () => {
     });
 
     it('should treat unknown models as falling back to default', () => {
-      const models = ['o1', 'o1-mini', 'o3', 'gpt-5.2', 'unknown-model'];
+      // Note: Don't include valid Cursor model IDs here (e.g., 'gpt-5.2' is in CURSOR_MODEL_MAP)
+      const models = ['o1', 'o1-mini', 'o3', 'unknown-model', 'fake-model-123'];
       models.forEach((model) => {
         const result = resolveModelString(model);
         // Should fall back to default since these aren't supported