[Refactor] Add slug-based document sharing and improve workspace sync handling

[Gautam25Raj]

Summary

This PR refactors the document sharing and workspace synchronization architecture by introducing stable slug-based sharing URLs, improving sync scoping behavior, and consolidating resume workspace storage handling.

The update also improves async feedback handling, document save reliability, and loading/error states across sharing workflows.

Refactor

Document Sharing System

• Moved public share URLs to:
  • /share/:username/:slug
• Added stable share slug behavior unless explicitly updated
• Prevented slug collisions across renamed documents
• Improved share link consistency and routing structure

Workspace & Sync Improvements

• Scoped:
  • Sync outbox
  • Telemetry
  • Active document IDs
  • by document type
• Preserved debounced resume save behavior and flush handling
• Enhanced document sync service to support RESUME document type
• Consolidated resume-related local storage handling into the document workspace service

Cleanup & Architecture

• Removed deprecated:
  • Resume local storage service
  • Resume sync service
• Simplified shared document persistence architecture
• Improved maintainability across workspace-related systems

Improvements

Error & Loading Handling

• Improved loading and error handling in share link services
• Surfaced localStorage save failures instead of incorrectly reporting success
• Enhanced async operation feedback consistency

Resume Data Handling

• Updated resume schema to support optional title fields
• Improved resume title formatting utilities
• Enhanced title handling consistency across document flows

UI & Feedback

• Added loadingText prop to Button component
• Improved user feedback during async operations
• Enhanced loading state clarity across actions

Beta Status

✅ Stability Improvements

• Workspace synchronization and sharing flows are more stable
• Improved document persistence reliability
• Additional sync and sharing refinements are still expected

Notes

• Beta-stage refactor release
• Focused on document sharing reliability, sync architecture, and workspace consistency
• Additional stabilization and workflow improvements expected in future beta releases

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🧪 Tests (adding or updating tests)

Checklist

• I have read the CONTRIBUTING.md document.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.