fix(updater): resolve PkgVersion duplicate declaration

Remove var PkgVersion from updater.go since go generate creates
const PkgVersion in version.go. Track version.go in git to ensure
builds work without running go generate first.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/updater/.gitignore

@@ -1,6 +1,5 @@
 # Go
 updater
-version.go
 *.exe
 *.exe~
 *.dll

internal/cmd/updater/updater.go

@@ -11,9 +11,6 @@ import (
 	"golang.org/x/mod/semver"
 )
 
-// PkgVersion is set via ldflags
-var PkgVersion = "dev"
-
 // Version holds the current version of the application.
 // It is set at build time via ldflags or fallback to the version in package.json.
 var Version = PkgVersion

internal/cmd/updater/version.go

@@ -0,0 +1,5 @@
+package updater
+
+// Generated by go:generate. DO NOT EDIT.
+
+const PkgVersion = "1.2.3"