docs(ramps): align sandbox-testing page with api-reference source of truth

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[pengying]

• docs(ramps): align sandbox-testing page with api-reference source of truth #358 👈 (View in Graphite)
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[greptile-apps]

Greptile Summary

This PR refactors sandbox-testing.mdx from a ~390-line step-by-step tutorial into a focused ~80-line reference page that describes only the sandbox-specific "magic values" (account number suffixes, test addresses) used to drive test outcomes. Full ramp flows are delegated to the existing conversion-flows article, and two new snippet components (SandboxQuotePatterns, SandboxKybVerification) are wired in.

Confidence Score: 5/5

Documentation-only change with no logic, all referenced snippets exist, and anchor links resolve correctly — safe to merge.

All five imported snippet files exist on disk, internal anchor targets match their heading text, and the code blocks carry the required language tag. No broken links, missing imports, or style-guide violations detected.

No files require special attention.

Important Files Changed

Filename	Overview
mintlify/ramps/platform-tools/sandbox-testing.mdx	Page trimmed from ~390 to ~80 lines; adds SandboxQuotePatterns and SandboxKybVerification snippet imports (both files confirmed to exist); internal anchor links and cross-references are correct.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[sandbox-testing.mdx] --> B[KYC/KYB verification\nSandboxKybVerification]
    A --> C[Adding external accounts\nSandboxExternalAccounts]
    C --> D[Beneficiary verification\nSandboxBeneficiaryVerification]
    A --> E[Transfer in\nSandboxTransferPatterns]
    E --> E1[transfer-in endpoint]
    E --> E2[sandbox fund endpoint]
    A --> F[Creating quotes\nSandboxQuotePatterns]
    F --> G[Executing a quote]
    G --> G1[Prefunded internal account]
    G --> G2[Real-time via sandbox send]
    A --> H[Transferring out\nsame magic suffix patterns]
    A -.->|delegates full flow| I[fiat-crypto-conversion.mdx]

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