Improve stability and error handling across auth, main, and accounts logic

[krlaskidata]

Summary

This PR improves stability, error handling, and overall robustness across multiple parts of the application, mainly focusing on authentication, window communication, and account handling.

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Key Changes

🔐 Authentication (auth-service.js)

• Enabled TLS verification (rejectUnauthorized: true) to improve security and prevent potential MITM risks
• Added missing console.warn fallback for unencrypted credential handling to improve visibility during debugging

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🧠 Core Logic (main.js)

• Introduced a centralized sendToWindow(channel, ...args) helper to reduce duplicated logic
• Added proper safety checks (mainWindow && !mainWindow.isDestroyed()) before sending events
  → prevents crashes when windows close during async operations
• Replaced empty .catch() blocks with proper logging (console.warn)
  → improves debugging and avoids silent failures
• Extracted reusable resolveAccountCookies(accountId) logic to eliminate duplication across:
  • resolveLiveAuthTokens
  • scanAllAccountRegions
  • copy-cloud-settings

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⚡ UI / Accounts (App.jsx)

• Optimized refreshAccountRanks:
  • Now filters only accounts with status === 'running'
  • Reduces unnecessary polling every 15 seconds
  • Improves performance for setups with multiple accounts

[krlaskidata]

Let me know what you think 🙂

I focused mainly on stability, removing duplication, and improving error visibility. I'm open to feedback or changes if something doesn't fit your expectations.
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