Code health in `benilla-ui`, found while its comments were rewritten. No behaviour a player can see changes.
- **Unused globals and queues removed.**
- The Rust `ChatFrame_OpenChat` and `ChatFrame_SendTell` queued text that nothing drained. The stock `ChatFrame.lua` defines both globals and replaces them when it loads, as the reference's FrameXML does.
- `BenillaGetItemStats` had no Lua caller. Its test of the item cache's miss, ask and push now runs through `GetItemInfo`, which shares that path.
- `UiScript::queue_social_request` had no caller.
- **One true/nil helper.** Seven modules each carried their own copy of `binding_abi::flag`, the reference's `1`-or-nil boolean. They call it now.
- **Three tests test their claim.**
- `click_focuses_regardless_of_autofocus_…` built both boxes with autoFocus on. One is now off.
- `level_shift_saturates_at_zero` never saturated. Its child now drops past 0.
- The layout profiler's `plan` bucket was never set, so it always printed 0. It is gone.
- **Smaller fixes.** An empty `if buyback {}` branch is gone, and a doc comment no longer sits on a `use` line instead of on `install_justify`.
Checked with `cargo clippy -p benilla-ui --all-targets -D warnings` and `cargo test -p benilla-ui` (1513 passed) before the land gates.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
