Customize desktop status bar / 自定义桌面底部信息栏

[SivanCola]

Summary

• Add a desktop status bar style setting for text or icon labels.
• Add a collapsible status bar item editor with visibility toggles, arrow ordering, drag reordering, and insertion-line feedback.
• Add a per-turn cost status item and clarify the cumulative item as session cost.

Verification

• pnpm --dir desktop/frontend check:css
• pnpm --dir desktop/frontend typecheck
• go test -count=1 ./internal/config
• go test -count=1 . from desktop
• Browser verification: status bar shows 本次费用 and 会话费用, and the configurable item list renders correctly.

[esengine]

Thanks — the implementation looks great and I'm happy to merge this. The status-bar item config is clean, the frontend STATUS_BAR_ITEM_IDS match the backend knownDesktopStatusBarItems set exactly (with mirror normalizers on both sides, so a stale config degrades gracefully), and splitting per-turn turn_cost from the cumulative session cost is a nice touch.

It just needs a rebase onto current main-v2. #4071 and #4151 landed after you opened this and moved the shared frontend files (App.tsx, bridge.ts, types.ts, useController.ts, locales/*, app_test.go), so GitHub now shows conflicts — the same quick rebase you did on #4151. The conflicts should be additive (both sides just appended new locale keys / bridge methods / types). Once CI is green again I'll merge.

Thanks for the steady stream of solid PRs.

[esengine]

I rebased this onto current main-v2 in #4188 so it can land — #4071 / #4151 / #4176 had moved the shared frontend files after you opened this, and the conflicts were blocking the merge. #4188 is entirely your work carried across with the conflicts resolved, and it credits you. I'll merge it once CI is green and close this in favour of it. Thanks again for the steady stream of solid PRs!