Lt Html Tests Versioning

Overview

Keep test HTML versions in sync with edits by updating TEST_VERSION on every change to test content or behavior.

Guidelines

• Locate const TEST_VERSION = "x.y.z"; in the test HTML. If missing, add it next to other top-level constants, matching template.html.
• Increment the version any time the test file changes (word lists, gap-fill variants, translations, UI, or logic).
• Use semantic versioning; default to a patch bump (x.y.z -> x.y.(z+1)) unless the user requests a specific version.
• For larger changes: bump minor for new words/test types, bump major for structural or UX changes.