docs: add Multiwallet Linking page to accounts & authentication section

[devin-ai-integration]

Description

Adds a new "Multiwallet Linking" documentation page under the Accounts & Authentication section in the AppKit Overview navigation. This page explains the feature, its use cases, benefits, and links to framework-specific hook docs for React, Next.js, and Vue.

Changes

• New page: appkit/features/multiwallet-linking.mdx with Use Cases, Why use it, and Get Started sections
• Navigation: Added appkit/features/multiwallet-linking to the "Accounts & Authentication" group in docs.json
• Spell check: Added "Multiwallet" and "multiwallet" to .cspell.json

Things to verify during review

• The anchor #useappkitconnections in each card link should be verified to exist on the target hook/composables pages. (Auto-review confirmed they exist on React hooks:691, Next.js hooks:627, Vue composables:374.)
• Hook names referenced in the copy: useAppKitConnection (singular) & useAppKitConnections (plural) — confirm casing and naming are correct.
• Original copy used British English "behaviour"; changed to American English "behavior" to match codebase conventions (smart-accounts-interaction.mdx uses "behavior"). Confirm this is acceptable.

Updates since last revision

• Switched card href values from absolute URLs (https://docs.reown.com/...) to relative paths (/appkit/react/core/hooks#useappkitconnections) to match conventions in other overview pages and work correctly in preview deployments.
• Changed "behaviour" → "behavior" (American English) for codebase consistency; removed "behaviour" from .cspell.json.

Tests

• - Ran the changes locally with Mintlify and confirmed that the changes appear as expected.
• - Ran a grammar check on the updated/created content using ChatGPT.

Direct links to the deployed changes in Mintlify.

• Multiwallet Linking page

Link to Devin session: https://app.devin.ai/sessions/090cbf19871e411a8a2a370964c4ea56

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[claude]

Claude finished @devin-ai-integration[bot]'s task in 4s —— View job

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Review

• Gather context and read changed files
• Check link anchors and target pages
• Verify URL patterns vs codebase conventions
• Tone of voice compliance check
• Data classification check

Found 2 issue(s)

Issue 1: Absolute URLs in Card hrefs should be relative paths

ID: multiwallet-linking-absolute-urls-a3f1
File: appkit/features/multiwallet-linking.mdx:32-41
Severity: MEDIUM
Category: code_quality

Context:

• Pattern: Card href values use full absolute URLs (https://docs.reown.com/appkit/react/core/hooks#useappkitconnections)
• Risk: Every other feature overview page in appkit/features/ uses relative paths (e.g. /appkit/react/core/hooks#useappkitconnections). Absolute URLs break in preview/staging deployments and create maintenance burden if the domain changes.
• Impact: Links will not resolve correctly in Mintlify preview deployments; redirects/domain changes require content edits.
• Trigger: Every page load in non-production environments.

Recommendation: Use relative paths consistent with swaps.mdx, multichain.mdx, onramp.mdx, etc.:

<Card icon="react" href="/appkit/react/core/hooks#useappkitconnections">
<Card icon="square-n" href="/appkit/next/core/hooks#useappkitconnections">
<Card icon="vuejs" href="/appkit/vue/core/composables#useappkitconnections">

Fix this →

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Issue 2: British English "behaviour" inconsistent with codebase standard

ID: multiwallet-linking-spelling-behaviour-c2e8
File: appkit/features/multiwallet-linking.mdx:24
Severity: LOW
Category: code_quality

Context:

• Pattern: "behaviour" (British English) used twice on line 24; smart-accounts-interaction.mdx uses American "behavior".
• Risk: Inconsistent spelling within the same content section; the word was added to .cspell.json to suppress the spell-check failure rather than aligning with the existing convention.
• Impact: Minor inconsistency; no functional impact.

Recommendation: Change to American English to match the existing codebase convention:

- **Deeper insights into user behavior**: with multiwallet linking, users don't need to make 2 profiles to use 2 wallets, removing fragmentation and giving you better insights into user behavior.

Also remove "behaviour" from .cspell.json words list.

Additional notes (non-blocking):

• #useappkitconnections anchors confirmed present in all three target pages (React hooks:691, Next.js hooks:627, Vue composables:374) ✅
• Hook names useAppKitConnection (singular) and useAppKitConnections (plural) are both correct ✅
• Tone of voice: content is appropriately informative and professional for developer documentation ✅
• Data classification: no sensitive data patterns detected in the changed files ✅
• The "Get Started" copy refers to "Hooks" generically but Vue uses composables — minor, but could say "hooks and composables" for accuracy