# 📌 Changelog — LeetCode Problem Hider & Filter Panel (v1.3)

## 🚀 Performance Improvements
- Optimized row scanning to reduce unnecessary DOM operations
- Reduced repeated selector queries for better runtime speed
- Improved MutationObserver efficiency to only process added nodes
- Minimized redundant class toggling to prevent layout reflows
- Smarter progress update logic with reduced UI redraws

## 📊 Progress Circle Fixes
- Fixed progress circle calculation to correctly reflect `solved / total`
- Improved stroke rendering using consistent circumference math
- Ensured circle starts at top using proper rotation transform
- Fixed incorrect or drifting progress visualization issues

## 🧠 Stability Improvements
- Added safer initialization checks to prevent duplicate execution
- Improved sidebar detection for dynamic LeetCode SPA rendering
- Prevented race conditions when UI loads before DOM elements exist
- More reliable MutationObserver initialization flow

## 🎛 UI Enhancements
- Increased progress circle size for better visibility
- Improved spacing and layout consistency in sidebar panel
- Cleaner button rendering logic with fewer DOM writes
- Better visual feedback for active filter states

## 🔒 Behavior Fixes
- Prevents disabling all difficulty filters at once
- Ensures filter state is always recoverable
- Improved handling of missing or partially loaded LeetCode UI elements

## ⚡ Overall
- Faster startup on page load
- More stable across LeetCode SPA navigation
- Lower CPU usage during problem list updates
- More accurate progress tracking display

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## 📝 Notes
This update focuses on:
- Performance optimization
- UI stability improvements
- Fixing progress visualization accuracy
- Making the script more reliable on dynamic page loads

Update the circle to match the completed Problems and to be a bit larger.

📌 Changelog — LeetCode Problem Hider & Filter Panel

🚀 Version 1.3

This update is mostly about fixing edge cases and making the script behave more reliably on LeetCode’s constantly changing UI. No new features were added — just polishing, stability improvements, and bug fixes.

🧠 Settings handling

• Improved how settings are loaded from localStorage
• Script now safely falls back to defaults if stored data is missing or broken
• Prevents crashes caused by invalid JSON or partially saved settings
• Ensures updates between versions don’t wipe or break user preferences

🎨 Style loading

• CSS is now injected directly into document.head
• More consistent styling on first load
• Fixes rare cases where styles didn’t apply when the page loaded slowly or partially

⚡ Sidebar reliability

• Improved detection of the sidebar container (#sidebarWidthContainer)
• Script retries more reliably until the sidebar is available
• Panel now appears more consistently on refresh and SPA navigation

🔁 Filtering improvements

• Better handling of dynamically loaded rows (infinite scroll / SPA updates)
• MutationObserver logic is more stable and less likely to miss new content
• Filters now apply more consistently when LeetCode updates the DOM in chunks

📊 Progress card fixes

• More reliable parsing of progress text (solved / total)
• Handles cases where the progress element hasn’t loaded yet
• Prevents broken states like NaN or empty values
• Progress circle animation is smoother and less likely to flicker

🧹 Cleanup

• Removed some redundant DOM checks
• Simplified initialization flow slightly
• Improved readability and consistency of row scanning logic

🐛 Bug fixes

• Fixed sidebar occasionally not appearing on fast navigation
• Fixed some cases where newly loaded problems weren’t being filtered
• Fixed progress card flickering on initial load
• Fixed inconsistent difficulty detection in rare layouts

📌 Notes

• No external APIs are used
• Everything runs locally in the browser
• Works entirely by reading and modifying the existing LeetCode page

v1.2
Expanded internationalization support (added 30+ language translations for metadata)
Improved localization consistency across @name and @description
Standardized wording across all supported languages
Minor correction of several translations for accuracy and readability

Changed License From All Rights Reserved to GPL v3