refactor: remove unused OAuthConsentDecision type (#13277)

The `OAuthConsentDecision` type alias had no references anywhere — the
function `submitOAuthConsentDecision` is not annotated with it, and
nothing imports it. Removed.

The other type/enum candidates fallow flagged were verified as NOT dead
and left untouched:
- `NodeBadgeMode.None/ShowAll/HideBuiltIn` — consumed via
`Object.values` across `coreSettings`, `apiSchema` (zod enum), and the
badge composables.
- `src/types/index.ts` barrel and litegraph types — public/extension
surface.
- `generatedManagerTypes` `paths`/`webhooks`/`$defs`/`operations` —
openapi-codegen output, not hand-editable.

Gates: typecheck, knip pass (type-only change).

Stacked PR. Base: `drjkl/cleanup-dead-exports`.

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: Amp <amp@ampcode.com>

Author: 3 people

src/platform/cloud/oauth/oauthApi.ts

@@ -51,10 +51,6 @@ export type OAuthConsentDecisionParams = {
   expectedRedirectUri?: string
 }
 
-export type OAuthConsentDecision = (
-  params: OAuthConsentDecisionParams
-) => Promise<void>
-
 // Schemes that execute in our origin if navigated. Never navigable,
 // regardless of what the backend returns. Everything else is governed
 // by binding to the challenge's registered redirect_uri — no per-client