Tip route `/tip` fails when accessed directly without required parameters

[NiKHiLkr23]

When users navigate directly to https://verify-bot.gib.work/tip without required query parameters, the page loads but shows errors related to missing receiver information and token requirements.

Current Behavior:

• Direct access to /tip loads the tip interface
• Shows "Required token not found in wallet" error
• Wallet connection works but functionality is broken without proper parameters
• No validation for required parameters (receiver_user_id, amount, etc.)

Expected Behavior:

• Should validate required parameters on page load
• Should show helpful error message if parameters are missing