fix: address PR review feedback

- ClaudeSymlinkManager.uninstall() now returns count for accurate reporting
- install-command.ts uses return value instead of always incrementing
- claude-dir-installer.ts uses getCcsHome() directly instead of string manipulation
- Add TODO comments to tests explaining --install is a no-op

tests/native/windows/uninstall.ps1

@@ -191,6 +191,8 @@ Test-Case "Empty uninstall: Reports 0 items removed" "Zero removed count" {
 # ============================================================================
 
 # Install first so we can test uninstall
+# NOTE: --install is currently a no-op (under development), but we call it
+# to test the install/uninstall cycle works without errors
 Write-Host ""
 Write-ColorOutput "Setting up for install/uninstall cycle test..." "Yellow"
 $originalHome = $env:HOME