fix: Word and colour Windows workloads correctly across the UI

CLAUDE.md

@@ -383,9 +383,11 @@ one wire shape, worded per platform in the UI, which is the only layer that
 knows the host's OS. The platform split lives entirely in the agent, as build
 tags (`systemd_linux.go` / `services_windows.go` and the matching `control_`
 and `logs_` pairs); the control plane is OS-blind and needed no changes.
-Windows collection runs PowerShell through `agent/internal/winexec`, and every
-script emits JSON that a build-tag-free parser reads, so the parsers are tested
-on Linux — the agent module has no Windows CI.
+Windows collection runs PowerShell through `agent/internal/winexec`. Every
+script that reports data emits JSON that a build-tag-free parser reads, so
+those parsers are tested on Linux — the agent module has no Windows CI. The
+control verbs and `serviceDisplayName` emit no JSON and have no parser; they
+are exercised only by running the agent on Windows.
 
 **Not gated by licence**: this reads as core fleet management, so v1 ships
 everywhere with no `HasFeature` check. If that changes the check belongs at