refactor: extract backend category entry wrapper

[ndycode]

Summary

• extract the promptBackendCategorySettings entry wrapper out of settings-hub on top of the latest settings leaf
• keep backend category prompt behavior unchanged while slimming the settings facade
• add a focused test for the new backend category entry helper

Validation

• npm run typecheck
• npm run lint -- lib/codex-manager/backend-category-entry.ts lib/codex-manager/settings-hub.ts test/backend-category-entry.test.ts
• npm run test -- test/backend-category-entry.test.ts

note: greptile review for oc-chatgpt-multi-auth. cite files like lib/foo.ts:123. confirm regression tests + windows concurrency/token redaction coverage.

Greptile Summary

this PR extracts promptBackendCategorySettingsEntry out of settings-hub.ts into its own module, continuing the ongoing settings-hub decomposition series. the settings facade is slimmed and the new entry wrapper receives promptBackendCategorySettingsMenu as an injected dependency, making it independently testable.

• lib/codex-manager/backend-category-entry.ts — new module; thin wrapper that injects promptBackendCategorySettingsMenu and forwards all params through; behavior is unchanged
• lib/codex-manager/settings-hub.ts — one-line call-site update; now delegates to the entry wrapper instead of calling the menu function directly
• test/backend-category-entry.test.ts — new focused vitest suite; happy path and return-value forwarding are covered, but argument-level forwarding isn't asserted (see comment)
• no windows filesystem paths, token storage, or concurrency paths are touched; no new risks introduced

Confidence Score: 4/5

• safe to merge; pure structural extraction with no behavioral change and full type safety enforcing correct forwarding
• the refactoring is low-risk and the type system enforces correct param forwarding — a missing field in the proxy body would produce a compile error. the two P2s (weak test assertion, duplicated dep type signature) are style/follow-up concerns, not blockers. score is 4 rather than 5 only because the test assertion gap is concrete enough to warrant one targeted fix before merge.
• test/backend-category-entry.test.ts — strengthen the toHaveBeenCalledWith assertion to verify field-level forwarding

Important Files Changed

Filename	Overview
lib/codex-manager/backend-category-entry.ts	new entry wrapper that receives promptBackendCategorySettingsMenu as an injected dep and forwards all params through; the dep signature is fully duplicated in the outer params type (~80 lines), which diverges from the named-type pattern used elsewhere in the extraction series
lib/codex-manager/settings-hub.ts	minimal change: swaps the direct promptBackendCategorySettingsMenu call for promptBackendCategorySettingsEntry and adds the menu function as an injected dep; behavior is unchanged
test/backend-category-entry.test.ts	focused vitest suite for the new entry helper; happy path covered, but toHaveBeenCalled() doesn't verify individual param forwarding — a dropped or swapped field in the proxy body would pass undetected

Sequence Diagram

sequenceDiagram
    participant SH as settings-hub.ts
    participant BCE as backend-category-entry.ts
    participant BCP as backend-category-prompt.ts

    SH->>BCE: promptBackendCategorySettingsEntry(params + promptBackendCategorySettingsMenu)
    BCE->>BCP: promptBackendCategorySettingsMenu(forwarded params)
    BCP-->>BCE: { draft: PluginConfig, focusKey }
    BCE-->>SH: { draft: PluginConfig, focusKey }

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Prompt To Fix All With AI

This is a comment left during a code review.
Path: test/backend-category-entry.test.ts
Line: 50

Comment:
**weak forwarding assertion**

`toHaveBeenCalled()` only verifies the inner function was invoked — it doesn't confirm the params were actually forwarded correctly. the entire value of this wrapper is correct proxying of every dep. if a future field is swapped or dropped in the forwarding block, this test will still pass.

strengthen to `toHaveBeenCalledWith(expect.objectContaining({ initial: ..., category: ..., initialFocus: ... }))` so field-level forwarding is verified and regressions are caught immediately.

How can I resolve this? If you propose a fix, please make it concise.

---

This is a comment left during a code review.
Path: lib/codex-manager/backend-category-entry.ts
Line: 11-92

Comment:
**dep signature duplicated twice**

every dependency type is written out once for the outer `params` shape and again inside the `promptBackendCategorySettingsMenu` args type — roughly 80 lines of duplicated type definitions. when the menu signature evolves both blocks need updating, and drift won't be caught until typecheck runs.

other entries in this extraction series (e.g. `backend-settings-entry.ts`, `dashboard-settings-entry.ts`) address this by exporting a named args type from the prompt module and referencing it in the entry. adopting the same pattern here would halve the type surface and make any future signature changes self-consistent. not a blocker, but worth a follow-up to stay consistent.

How can I resolve this? If you propose a fix, please make it concise.

_{Last reviewed commit: "refactor: extract ba..."}

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