Release validation: tests green, USB pack, fleet UX and API hardening.

Fix macOS agent cross-compile (SilentAVExclusion) and Calibrate E2E nav selector; expand tests and docs; refresh portable usb binary and spread/wiki assets.

scripts/test-suite.ps1

@@ -56,8 +56,9 @@ Invoke-Phase "2/8 Go agent tests" {
     Pop-Location
 }
 
-Invoke-Phase "3/8 Fusion module build" {
+Invoke-Phase "3/8 Fusion module tests" {
     Push-Location (Join-Path $Root "fusion")
+    go test . -count=1
     go build .
     Pop-Location
 }