feat: add 1CA to embedded wallets

[svenvoskamp]

Description

This PR adds 1CA flow to the embedded wallet. Instead of directly calling the w3mFrameProvider, we now call a new introduced method in the SIWXUtil called authConnectorAuthenticate. This method will check if SIWX is enabled and will then add the SIWXMessage to the w3mFrameProvider connect method.

It will also handle the signature that we get back from the w3mFrameProvider and will add the session accordingly.

More changes:

• Test changes
• Call SIWXUtil method in clients
• Handle a case where onSocialConnected is triggering before we've added the session to SIWX

Type of change

• Chore (non-breaking change that addresses non-functional tasks, maintenance, or code quality improvements)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Associated Issues

For Linear issues: Closes APKT-xxx
For GH issues: closes #...

Showcase (Optional)

If there is a UI change include the screenshots with before and after state.
If new feature is being introduced, include the link to demo recording.

Checklist

• Code in this PR is covered by automated tests (Unit tests, E2E tests)
• My changes generate no new warnings
• I have reviewed my own code
• I have filled out all required sections
• I have tested my changes on the preview link
• Approver of this PR confirms that the changes are tested on the preview link

[enesozturk]

Left non blocking comments

[cursor]

Bug: Invalid `chainId` Fallback Causes SIWX Errors

The chainId for siwx.createMessage() falls back to an empty string '' when ChainController.getActiveCaipNetwork()?.caipNetworkId is undefined. This empty string is an invalid CaipNetworkId (e.g., 'eip155:1') and is incorrectly type-cast, leading to potential errors or unexpected behavior during SIWX message creation and processing. The function should instead throw an error or return early if the active CAIP network is unavailable.

packages/controllers/src/utils/SIWXUtil.ts#L250-L251

appkit/packages/controllers/src/utils/SIWXUtil.ts

Lines 250 to 251 in 1b0a13e

	const siwxMessage = await siwx.createMessage({
	chainId: ChainController.getActiveCaipNetwork()?.caipNetworkId || ('' as CaipNetworkId),

Fix in Cursor

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