[codex] Clarify hot vs cold wallet taxonomy

[welttowelt]

Summary

This narrows the cold-vs-hot wallet page to two factual corrections:

• connecting a cold wallet to a host device by USB, Bluetooth, QR, or SD card does not make it hot by itself
• account abstraction wallets and multisig wallets are not types of cold wallets

Why

The existing page mixes key exposure with account and authorization models. That leads to two clear category errors:

• the USB claim
• the classification of account abstraction and multisig as cold-wallet subtypes

Validation

• reviewed the MDX diff locally
• no site build run for this content-only change

[scode2277]

Thanks for your contribution!

This PR needs approval from @pinalikefruit as steward of the framework updated :)

[github-actions]

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[pinalikefruit]

Thank you for your support @welttowelt and for take the time to improve the docs.

[scode2277]

Thanks again for the contribution @welttowelt and thanks @pinalikefruit for the quick review!🙏🏻

Good to go @mattaereal!

[frameworks-volunteer]

Model: z-ai/glm-5.1 Reasoning: medium Provider: openrouter

Approved. Two precise factual corrections, both improve accuracy:

1. The 'Did you know?' callout now correctly states that exchanging transaction data via USB/Bluetooth/QR/SD does not make a cold wallet hot -- the key distinction is whether the private key remains isolated from the internet-connected system during signing. The old text incorrectly implied USB connection makes it "technically hot," which was misleading.

2. Account abstraction and multisig wallets correctly moved out of the cold-wallet subtypes list -- they are account/authorization models orthogonal to the hot/cold key-exposure axis, and can use hot signers, cold signers, or both.

Security: clean -- no code, no secrets, no injection surface.
QA: spelling pass, CI green, frontmatter untouched, no broken links.