Seed from go-template-repo, renamed to simplexcalc

The template's files at a77fd30, without its history or LICENSE, after
script/rename simplexcalc.

Model: opus-5-5

internal/globals/globals.go

@@ -0,0 +1,43 @@
+// Package globals provides build-time variables injected via ldflags.
+package globals
+
+import (
+	"runtime"
+
+	"go.uber.org/fx"
+)
+
+// Build-time variables populated from main() and copied into the
+// Globals object. main() sets them from its own ldflags-injected
+// values; nothing else writes them.
+//
+//nolint:gochecknoglobals // Build-time variables set by main().
+var (
+	Appname   string
+	Version   string
+	Buildarch string
+)
+
+// Globals holds build-time metadata about the application.
+type Globals struct {
+	Appname   string
+	Version   string
+	Buildarch string
+}
+
+// New creates a Globals instance from the package-level build-time
+// variables.
+//
+//nolint:revive // lc parameter is required by fx even if unused.
+func New(lc fx.Lifecycle) (*Globals, error) {
+	arch := Buildarch
+	if arch == "" {
+		arch = runtime.GOARCH
+	}
+
+	return &Globals{
+		Appname:   Appname,
+		Buildarch: arch,
+		Version:   Version,
+	}, nil
+}