[Feature] [Cover Letter] Enhance PDF generation, pagination, and rendering structure

[Gautam25Raj]

Description:

Summary

This PR enhances the cover letter rendering system by improving PDF layout generation, pagination handling, rendering structure, and styling consistency across PDF and HTML outputs.

The update introduces new flow item structures, refined rendering logic, and improved synchronization workflows for document state handling.

Features

PDF Generation Improvements

• Introduced new flow item types for improved PDF content structure
• Added chunking utilities for splitting large text blocks
• Implemented pagination helpers for better content distribution across pages
• Improved multi-page rendering consistency and layout handling

Rendering Enhancements

• Refactored rendering logic to support new flow item structures
• Improved rendering consistency across PDF and web outputs
• Enhanced handling for dynamic content rendering workflows

HTML & Styling Updates

• Updated HTML generation for new flow item structures
• Improved styling consistency between PDF and web rendering
• Enhanced bullet point rendering and spacing
• Refined overall document readability and visual structure

Improvements

Layout & Readability

• Improved PDF layout organization and spacing
• Enhanced typography and bullet point styling
• Improved rendering alignment and content flow handling

State Synchronization

• Added event dispatch support for document storage updates
• Improved synchronization between document-related components
• Enhanced shared document state consistency

Architecture & Maintainability

• Simplified rendering structure for future extensibility
• Improved rendering utility organization
• Enhanced maintainability of document generation workflows

Beta Status

✅ Stability Improvements

• PDF rendering flows are more stable and structured
• Improved consistency across HTML and PDF outputs
• Additional rendering and pagination refinements are still expected

Notes

• Beta-stage rendering enhancement release
• Focused on document rendering quality, pagination handling, and layout consistency
• Additional rendering optimizations 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.