Feat/frontend ux enhancement

[sweetsoul21]

Summary

Related Issue

Closes #367

Complexity

• Trivial
• Medium
• High

Type of Change

• Feature
• Fix
• Docs
• Perf
• Test

Screenshots

Test Coverage

• Unit tests added/updated (npm test)
• E2E tests added/updated (npm run test:e2e)
• Storybook stories added/updated for new/changed components
• Manual testing completed
• Coverage thresholds maintained (90% lines/functions, 80% branches)

Accessibility

Closes #368

• Keyboard tested: Yes
• Keyboard tested: No / Not applicable

Checklist

Closes #369

• Code follows project style guidelines (npm run lint)
• Self-review completed
• Comments added for complex logic
• Documentation updated (README, DESIGN.md, architecture docs) if needed
• No new console warnings or errors
• All tests passing locally

Description

This PR implements several UX and accessibility improvements across the frontend:
Closes #370

• Adds a confirmation dialog to the Vote section to prevent accidental submissions.
• Enhances the LP Dashboard with a new portfolio summary section displaying key metrics and trends.
• Updates the focus ring styling on all inputs (Text, Select, Textarea) to align with the Ghost Border design system.
• Adds recent actions history (max 10) and a clear history option to the Command Palette.

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