Update Next.js to 16.0.7

[Copilot]

• Update Next.js from 15.4.2-canary.35 to the latest stable version (16.0.7)
• Update @next/env to match the new Next.js version (16.0.7)
• Run pnpm install to install updated dependencies and update lockfile
• Run typecheck to ensure no TypeScript errors
• Fix biome lint error (sort imports in account/page.tsx)
• Run security check - no vulnerabilities found
• Run code review - no issues found

Original prompt

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This section details on the original issue you should resolve

<issue_title>nextjsを最新版にアップデート</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes nextjsを最新版にアップデート #7

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[howyi]

biomeのlintがエラーとなっているので追加で修正して

[howyi]

biome lintでエラー

[Copilot]

biome lintでエラー

Fixed in f9dacad. Ran biome check --write --unsafe to sort the imports in account/page.tsx.

biomeのlintがエラーとなっているので追加で修正して

Fixed in f9dacad. The import order in app/(protected)/account/page.tsx has been sorted using pnpm lintf.