feat: add error_type to RehydrationPasswordFailed event (#37373)

## **Description**

Added `error_type` property to the `RehydrationPasswordFailed` analytics
event to distinguish between:
- `'incorrect_password'`: Wrong password entered
- `'unknown_error'`: Other errors

This provides better visibility into rehydration failure reasons

[![Open in GitHub
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## **Changelog**

CHANGELOG entry: null

## **Related issues**

Fixes: https://consensyssoftware.atlassian.net/browse/SL-240

## **Manual testing steps**

1. Set up a social login account during onboarding
2. Lock the wallet
3. Try to unlock with incorrect password
4. Verify `RehydrationPasswordFailed` event includes `error_type:
'incorrect_password'`

## **Screenshots/Recordings**

N/A - Analytics enhancement only

## **Pre-merge author checklist**

- [x] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask
Extension Coding
Standards](https://github.com/MetaMask/metamask-extension/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-extension/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [x] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [x] 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]
> Adds `error_type` ('incorrect_password' | 'unknown_error') to
`RehydrationPasswordFailed` during social rehydration in
`unlock-page.component.js`.
> 
> - **Analytics**
>   - In `ui/pages/unlock-page/unlock-page.component.js`:
> - Determine error type from `message` (including
`SeedlessOnboardingControllerErrorMessage.IncorrectPassword`).
> - Add `error_type` to `RehydrationPasswordFailed` event properties
during rehydration (`incorrect_password` or `unknown_error`).
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
93ffae6. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: huggingbot

ui/pages/unlock-page/unlock-page.component.js

@@ -249,6 +249,14 @@ class UnlockPage extends Component {
     let finalUnlockDelayPeriod = 0;
     let errorReason;
 
+    // Determine error type for rehydration tracking
+    const isIncorrectPasswordError =
+      message === 'Incorrect password' ||
+      message === SeedlessOnboardingControllerErrorMessage.IncorrectPassword;
+    const errorType = isIncorrectPasswordError
+      ? 'incorrect_password'
+      : 'unknown_error';
+
     // Track wallet rehydration failed for social import users (only during rehydration)
     if (isRehydrationFlow) {
       this.context.trackEvent({
@@ -257,6 +265,7 @@ class UnlockPage extends Component {
         properties: {
           account_type: 'social',
           failed_attempts: this.failed_attempts,
+          error_type: errorType,
         },
       });
     }