Improve performance and bundle size

[replakcan]

Description

Review and improve frontend performance and bundle size.

Scope

• Review dependencies
• Remove unnecessary packages
• Optimize images/assets
• Review bundle output if available
• Improve loading behavior where simple

Out of Scope

• Full performance monitoring platform
• Server-side optimization
• Major architectural rewrite

Acceptance Criteria

• Unused dependencies are removed if found
• Large unnecessary assets are optimized or removed
• Images are reasonably optimized
• Build output is reviewed
• npm run build succeeds
• Static export compatibility is preserved

Technical Notes

• Avoid adding heavy dependencies for small UI needs.

Related

• Related to: Configure static export for AWS S3 deployment