Chrome Extension: Manifest V3 version with scroll fixes

[cclambie]

Chrome Extension Version (Manifest V3)

This PR creates a Chrome-compatible version of the Xero Cash Coding Filter extension using Manifest V3.

Changes Made

1. Manifest V3 Migration

• Updated manifest.json from Manifest V2 to V3
  • Changed manifest_version from 2 to 3
  • Moved URL permissions from permissions to host_permissions
  • This is required for modern Chrome extensions

2. Added Scroll Behavior Fixes

• New file: fix.css
  • Prevents page scroll when grid reaches boundaries
  • Improves grid scrolling with proper overflow handling
  • Sets max-height for better viewport management

3. Chrome-Specific Documentation

• INSTALL-CHROME.md: Complete installation guide for Chrome users
  • Load unpacked extension method
  • Package as .crx method
  • Troubleshooting tips
• README-CHROME-NOTES.md: Technical notes on Chrome compatibility
  • Migration details
  • Compatibility notes
  • Testing checklist

Compatibility

What Works the Same

✅ All filtering functionality
✅ Load all button
✅ Account "Has value" filter
✅ Clear button
✅ Progress indicators

What's Different

• Installation process (Chrome-specific)
• Manifest format (V3 vs V2)
• Permission declarations

Code Compatibility

The JavaScript code (content.js) is fully compatible with both Firefox and Chrome:

• No browser-specific APIs used
• Pure DOM manipulation
• Works identically on both platforms

Testing Recommendations

1. Load the extension in Chrome (Developer mode)
2. Navigate to https://go.xero.com/Bank/FastCoding.aspx
3. Verify all features work:
   • Filter row appears
   • Text filters work
   • Account checkbox works
   • Clear button works
   • Load all button works
   • Scrolling is smooth

Files Changed

• manifest.json - Converted to Manifest V3
• fix.css - NEW: Scroll behavior improvements
• INSTALL-CHROME.md - NEW: Chrome installation guide
• README-CHROME-NOTES.md - NEW: Technical documentation

Notes

This branch is based on initial-upload which contains all merged features including:

• Load all button functionality
• Account "Has value" filter
• Clear button
• MutationObserver for filter persistence

The Chrome version maintains feature parity with the Firefox version while using the modern Manifest V3 standard.