Use borrowing wording in TBV testnet docs

[web3jenks]

Summary

• Reframe user-facing TBV testnet docs from lending terminology to borrowing terminology
• Rename the testnet walkthrough sidebar label to "Use TBV Testnet For Borrowing"
• Refer to the public app as the TBV Testnet app instead of the Aave v4 Lending Dashboard
• Keep existing /use-for-lending/ routes and image paths unchanged for compatibility

Validation

• npm run build passed locally
• Existing warnings observed: remote doc 404 for Babylon release/v3.x, deprecated Docusaurus markdown config, stale Browserslist data, and existing ignored redirect entries

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[github-actions]

🔐 Commit Signature Verification

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Commit	Author	Signature	Key Type	Key Check
42bc9cb2766d	Jenks	✅	sk-ssh-ed25519	✅

Summary

• Commits verified: 1
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---

Required key type: sk-ssh-ed25519 (FIDO2 hardware key)

Last verified: 2026-06-02 13:36 UTC

[greptile-apps]

Greptile Summary

This PR rewords the TBV testnet docs around borrowing terminology. The main changes are:

• Renames user-facing references from the Aave lending dashboard to the TBV Testnet app.
• Updates several vault and repayment pages to describe borrowing positions instead of lending positions.
• Changes the generated category metadata for the testnet walkthrough section.
• Keeps existing /use-for-lending/ routes and image paths unchanged.

Confidence Score: 4/5

This is close, but the sidebar rename should be fixed before merging.

• The docs wording changes are mostly consistent.
• The active manual sidebar still shows the old lending label.
• No security concerns were found in the changed docs.

sidebars-default.js should be updated to match the new borrowing sidebar label.

Important Files Changed

Filename	Overview
docs/trustless-bitcoin-vault/use-for-lending/category.json	Updates generated category wording, but the active manual sidebar still has the old label.

_{Reviews (1): Last reviewed commit: "docs(tbv): use borrowing wording for tes..." | Re-trigger Greptile}

[kkkk666]

looks good~