Fix phone verification to return 501 error in production

[Copilot]

📌 PR Title

fix: return 501 error for phone verification in production

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📝 Description

Addresses feedback from PR #61. Phone verification was silently succeeding in production without sending SMS, creating a confusing UX where users never receive verification codes.

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✅ Changes

🔐 Authentication System

• register/route.ts: Return 501 (Not Implemented) error when phone verification requested in production
• resend-verification/route.ts: Same fix for resend flow

if (process.env.NODE_ENV === 'development') {
    console.log(`📱 PHONE VERIFICATION TOKEN for ${phone}:`, token);
} else {
    return NextResponse.json(
        { error: "Phone verification is not yet implemented" },
        { status: 501 }
    );
}

---

🔍 How to Test

1. Set NODE_ENV=production
2. Attempt registration with phone number
3. Verify 501 response instead of silent success

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⚡ Additional Notes

• Development mode unchanged: token logged to console for testing
• Production now explicitly fails rather than misleading users

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Project	Deployment	Preview	Comments	Updated (UTC)
smart-todo	Ready	Preview	Comment	Nov 27, 2025 8:16pm
smart-todo-wum3	Error			Nov 27, 2025 8:16pm

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

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• checkpoint.prisma.io
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