feat(cli): add version diagnostics and build-aware start

tools/tht/internal/version/info_test.go

@@ -0,0 +1,17 @@
+package version
+
+import (
+	"runtime"
+	"testing"
+)
+
+// Catches a source build that reports no usable identity or the wrong host platform.
+func TestCurrentReportsUsableSourceBuildIdentity(t *testing.T) {
+	info := Current()
+	if info.Version == "" || info.Commit == "" || info.BuildTime == "" {
+		t.Fatalf("Current() = %#v, want non-empty build identity", info)
+	}
+	if info.OS != runtime.GOOS || info.Arch != runtime.GOARCH {
+		t.Fatalf("Current() platform = %s/%s, want %s/%s", info.OS, info.Arch, runtime.GOOS, runtime.GOARCH)
+	}
+}