Fix broken custom networks link in installation docs

[devin-ai-integration]

Fix broken custom networks link in installation docs

Summary

Fixed broken relative links to custom networks documentation in installation pages across all frameworks. The issue was in snippet files that are imported into installation documentation - they used relative paths (../../core/custom-networks) that worked from their original location but broke when imported into the installation context.

Files changed:

• snippets/appkit/react/wagmi/about/implementation.mdx
• snippets/appkit/vue/wagmi/about/implementation.mdx
• snippets/appkit/next/wagmi/about/implementation.mdx
• snippets/appkit/javascript/wagmi/about/implementation.mdx

Change: Updated relative path from ../../core/custom-networks to custom-networks in all affected snippet files.

Review & Testing Checklist for Human

• Test custom networks link on ALL framework installation pages (React, Vue, Next.js, JavaScript) - I only tested React locally
• Verify links work in production deployment - relative path behavior might differ between dev and prod
• Check for other similar broken relative links - search for other ../../ patterns that might have same issue
• Confirm custom networks page loads correctly from all installation page contexts

---

Diagram

graph TD
    A[appkit/react/core/installation.mdx]:::context
    B[appkit/vue/core/installation.mdx]:::context
    C[appkit/next/core/installation.mdx]:::context
    D[appkit/javascript/core/installation.mdx]:::context
    
    E[snippets/appkit/react/wagmi/about/implementation.mdx]:::major-edit
    F[snippets/appkit/vue/wagmi/about/implementation.mdx]:::major-edit
    G[snippets/appkit/next/wagmi/about/implementation.mdx]:::major-edit
    H[snippets/appkit/javascript/wagmi/about/implementation.mdx]:::major-edit
    
    I[appkit/react/core/custom-networks.mdx]:::context
    J[appkit/vue/core/custom-networks.mdx]:::context
    K[appkit/next/core/custom-networks.mdx]:::context
    L[appkit/javascript/core/custom-networks.mdx]:::context
    
    A --> E
    B --> F
    C --> G
    D --> H
    
    E -.->|custom-networks| I
    F -.->|custom-networks| J
    G -.->|custom-networks| K
    H -.->|custom-networks| L
    
    subgraph Legend
        L1[Major Edit]:::major-edit
        L2[Minor Edit]:::minor-edit
        L3[Context/No Edit]:::context
    end
    
    classDef major-edit fill:#90EE90
    classDef minor-edit fill:#87CEEB
    classDef context fill:#FFFFFF

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Notes

• Root cause: Snippet files assumed they were being viewed from /snippets/ directory, but when imported into installation docs (in /appkit/*/core/), the relative path ../../core/custom-networks no longer resolved correctly
• Testing: Verified fix works locally on React installation page - link successfully navigates to custom networks documentation
• Risk: Same snippets are reused across multiple frameworks, so comprehensive testing across all installation pages is critical

---

Link to Devin run: https://app.devin.ai/sessions/a7a7545db53d430d83d37dbbe9a6ea79

Requested by: enes@reown.com (enes@reown.com)

[devin-ai-integration]

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[bkrem]

rebase this PR (so we get a mintlify deployment)