#29663)

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## **Description**
This PR enables back the predict test that was skipped and adds mocking
for the CLOB auth endpoint.

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## **Changelog**

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CHANGELOG entry:

## **Related issues**

Fixes:
https://consensys.slack.com/archives/C02U025CVU4/p1777884336901849

## **Manual testing steps**
N/A

## **Screenshots/Recordings**

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### **Before**
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### **After**
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## **Pre-merge author checklist**

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- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [x] I've completed the PR template to the best of my ability
- [x] I've included tests if applicable
- [x] I've documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [x] I've applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

#### Performance checks (if applicable)

- [ ] I've tested on Android
  - Ideally on a mid-range device; emulator is acceptable
- [ ] I've tested with a power user scenario
- Use these [power-user
SRPs](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/edit-v2/401401446401?draftShareId=9d77e1e1-4bdc-4be1-9ebb-ccd916988d93)
to import wallets with many accounts and tokens
- [ ] I've instrumented key operations with Sentry traces for production
performance metrics
- See [`trace()`](/app/util/trace.ts) for usage and
[`addToken`](/app/components/Views/AddAsset/components/AddCustomToken/AddCustomToken.tsx#L274)
for an example

For performance guidelines and tooling, see the [Performance
Guide](https://consensyssoftware.atlassian.net/wiki/spaces/TL1/pages/400085549067/Performance+Guide+for+Engineers).

## **Pre-merge reviewer checklist**

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- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk because changes are limited to E2E mocking and a previously
skipped smoke test; main risk is increased test flakiness if the new
CLOB auth mocks don’t match real request shapes.
> 
> **Overview**
> Re-enables the Predictions smoke test for opening a position by
ensuring the Polymarket order-placement flow no longer attempts live
calls to `clob.polymarket.com`.
> 
> Adds `POLYMARKET_CLOB_AUTH_MOCKS` to mock both CLOB API-key creation
(forced `400`) and the derive-key fallback (`200`), and wires it into
`POLYMARKET_COMPLETE_MOCKS`. Also removes the explicit
`clob.polymarket.com` host entry from the E2E allowlist.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
28ea80b. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->