Add CSP guidance to MetaMask Connect troubleshooting

[shahbaz17]

Description

• Add a Content Security Policy section to the MetaMask Connect troubleshooting page explaining required directives (wss://mm-sdk-relay.api.cx.metamask.io in connect-src, img-src data:, etc.), example policies, symptoms, and compatibility notes for older packages. Also document provider.request preserving wallet JSON-RPC error.data since @metamask/connect-evm 2.1.0 (and err.rpcData on multichain), note that closing the modal rejects with EIP-1193 4001 since @metamask/connect-multichain 1.2.0, and update Flask/QR-flow troubleshooting and recommended upgrades.
• Standardizes formatting across Markdown, TypeScript, JSX, and HTML files to match repo linting and readability rules. It updates several doc tables and code snippets for consistency, tweaks product dropdown event handlers to use double-quoted attribute strings, and removes stale lockfile libc entries generated by dependency resolution.

Issue(s) fixed

Fixes #

Preview

Checklist

• If this PR updates or adds documentation content that changes or adds technical meaning, it has received an approval from an engineer or DevRel from the relevant team.
• If this PR updates or adds documentation content, it has received an approval from a technical writer.

External contributor checklist

• I've read the contribution guidelines.
• I've created a new issue (or assigned myself to an existing issue) describing what this PR addresses.

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Note

Low Risk
Changes are documentation and cosmetic formatting; no runtime application logic beyond HTML attribute quoting in the nav dropdown.

Overview
MetaMask Connect troubleshooting gets a dedicated Content Security Policy section: required connect-src / img-src (and optional analytics, RPC, modal styling), example header and meta policies, a symptom-to-directive table, and notes for older packages that needed extra connect-src for QR fox icons. The QR-code CSP subsection is shortened to point at that guide, and the diagnostic checklist now calls out relay + data: CSP.

The same page documents error.data / err.rpcData on failed wallet calls (EVM 2.1.0+), modal close as EIP-1193 4001 (multichain 1.2.0+), and a new MetaMask Flask entry (Flask RDNS detection and recommended package upgrades). Front matter keywords were updated for CSP and Flask.

Elsewhere the PR is mostly formatting: editorial spacing in AGENTS.md, table/type layout in Smart Accounts Kit reference (including versioned copies), column alignment in the SDK migration option table, Prettier-style tweaks in Card.tsx, Snaps types, quickstart/tutorial imports, and product nav onfocus/onmouseover handlers (double-quoted attributes). package-lock.json drops stale libc fields on optional @parcel/watcher Linux packages.

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Project	Deployment	Actions	Updated (UTC)
metamask-docs	Ready	Preview	Aug 13, 2026 11:47am

[AyushBherwani1998]

LGTM, i assume other changes are prettier changes.

[shahbaz17]

LGTM, i assume other changes are prettier changes.

Yes, the npm run format