feat: modernize Authentication Modal layout with password toggles and smooth animations #105

[prasiddhi-105]

📝 Description

This PR fully resolves issue #105 by overhauling the authenticating dialog interface framework, replacing standard platform browser rendering with a polished glassmorphic modal design.

Key implementations include:

• Smooth Animation Profiles: Integrated explicit CSS keyframe actions (fadeInModal and slideUpModal) creating unified motion tracking upon panel opening.
• Inline Toggle Interfaces: Built custom password input layers equipped with functional state icons (👁️ / 🙈) to let users effortlessly reveal or mask text fields.
• Network & Safety Safeguards: Bound input elements directly to async promise loading flags (⏳ Please wait...) to prevent double-form submission during active server processing cycles.

🔗 Related Issue

Closes #105

Screenshot or Screenrecording:

Screen.Recording.2026-07-18.220913.mp4

✅ Type of Change

• ✨ New feature (non-breaking change that adds functionality)
• 💅 UI/UX improvement

🧪 How Has This Been Tested?

• Verified full keyboard overlay closing escape clicks trigger cleanly without memory leaks.
• Validated proper user loading states and input disabling layers switch effectively over operational local endpoints.

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