fix(wagmi): add resetSSRState method to prevent cross-request state leakage

[Khizr97]

Summary

• Added resetSSRState() method to WagmiAdapter to prevent cross-request state leakage in Next.js SSR
• In Next.js App Router with SSR, the WagmiAdapter is typically created as a module-level singleton
• This can cause one user's wallet connection state to leak into another user's server-rendered HTML
• The new method resets wagmi config state when no cookies are present

Fixes REOWN-4523

Changes

1. packages/adapters/wagmi/src/client.ts

   • Added resetSSRState() method that clears connections, sets current to null, and status to 'disconnected'

2. examples/next-wagmi-app-router/src/app/layout.tsx

   • Updated example to demonstrate proper SSR state reset usage

3. examples/next-wagmi-app-router/src/config/index.ts

   • Added ssr: true to WagmiAdapter configuration

4. packages/adapters/wagmi/src/tests/client.test.ts

   • Added unit tests for resetSSRState() method

Test plan

• Unit tests added and pass for resetSSRState method
• Build passes
• All existing tests pass

🤖 Generated with Claude Code

[linear]

REOWN-4523 [bug] [SSR] WagmiAdapter singleton causes cross-request state leakage in Next.js App Router

[changeset-bot]

⚠️ No Changeset found

Latest commit: 66562d1

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

Thank you for your contribution! We ask that you please read and sign our CTA Document before we can accept your contribution. You can sign the CTA simply by posting a Pull Request Comment with the following text:

---

I have read the CTA Document and I hereby sign the CTA

---

_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
appkit-demo	Ready	Preview, Comment	Mar 31, 2026 2:43pm
appkit-gallery	Ready	Preview, Comment	Mar 31, 2026 2:43pm
appkit-headless-sample-app	Ready	Preview, Comment	Mar 31, 2026 2:43pm
appkit-laboratory	Ready	Preview, Comment	Mar 31, 2026 2:43pm

9 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
appkit-basic-example	Ignored		Mar 31, 2026 2:43pm
appkit-basic-sign-client-example	Ignored		Mar 31, 2026 2:43pm
appkit-basic-up-example	Ignored		Mar 31, 2026 2:43pm
appkit-ethers5-bera	Ignored		Mar 31, 2026 2:43pm
appkit-nansen-demo	Ignored		Mar 31, 2026 2:43pm
appkit-wagmi-cdn-example	Ignored		Mar 31, 2026 2:43pm
ethereum-provider-wagmi-example	Ignored		Mar 31, 2026 2:43pm
next-wagmi-solana-bitcoin-example	Ignored		Mar 31, 2026 2:43pm
vue-wagmi-example	Ignored		Mar 31, 2026 2:43pm

[github-actions]

Visual Regression Test Results ✅ Passed

⚠️ 15 visual change(s) detected

Chromatic Build: https://www.chromatic.com/build?appId=6493191bf4b10fed8ca7353f&number=850
Storybook Preview: https://6493191bf4b10fed8ca7353f-esfaodegzw.chromatic.com/

👉 Please review the visual changes in Chromatic and accept or reject them.