Fix fidget plugin flashing and improve message formatting

[fcoury]

Summary

• Implemented a plugin overlay system to eliminate visual flashing in the fidget plugin
• Improved message formatting to match fidget.nvim's clean style
• Added spinner animation that appears on the right side of active tasks

Problem

The fidget plugin was experiencing severe visual flashing issues where LSP progress messages would flicker constantly during rust-analyzer operations. Messages were also poorly formatted with redundant information.

Solution

1. Created a Plugin Overlay System

   • New PluginOverlay structure with separate render buffers
   • Dirty region tracking to avoid unnecessary redraws
   • Support for different alignment options (top, bottom, avoid_cursor)
   • Messages now appear in bottom-right corner like fidget.nvim

2. New Plugin API

   • red.createOverlay(id, config) - Create positioned overlays
   • red.updateOverlay(id, lines) - Update overlay content
   • red.removeOverlay(id) - Remove overlays

3. Improved Message Formatting

   • Cleaner title extraction (e.g., "rustAnalyzer/Indexing" → "Indexing")
   • Better progress display (e.g., "Indexing: 17/21 (unicode_width)")
   • Animated spinner on the right side of active tasks
   • Checkmark icon for completed tasks

Test plan

• Build the project with cargo build
• Test with a Rust project to trigger rust-analyzer progress messages
• Verify no visual flashing occurs
• Confirm messages appear in bottom-right with proper formatting
• Check that spinner animates on active tasks
• Ensure completed tasks show checkmark

🤖 Generated with Claude Code

[Copilot]

Pull Request Overview

This pull request fixes the fidget plugin’s visual flashing issues and improves message formatting by introducing a plugin overlay system and integrating a refined timer management mechanism. Key changes include:

• A new overlay API with create, update, and remove operations for flicker‐free overlay rendering
• A reworked timer system that replaces the old timeout tracking with a polling-based callback mechanism and adds timer statistics
• Updates to the fidget plugin and editor integration to use the new overlay and timer APIs

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/plugin/timer_stats.rs	Adds timer usage tracking with creation and clearing statistics
src/plugin/runtime.rs	Reworks timeout handling with a polling mechanism and adds overlay ops
src/plugin/runtime.js	Updates JS timer functions and overlay API integration
src/plugin/overlay.rs	Implements overlay rendering and positioning logic
src/plugin/mod.rs	Exports new overlay and timer modules
src/editor/rendering.rs / src/editor.rs	Incorporates overlay updates and timer callback processing into the editor
plugins/fidget.js	Enhances the fidget plugin with clean message formatting and spinner animation
examples/timer-test.js	Provides tests validating timer callback functionality
docs/TIMER_IMPROVEMENTS.md	Documents updated timer and overlay implementations
.hookman/hooks/pre-push.toml & ci.yml	Minor CI and pre-push hook updates

Comments suppressed due to low confidence (1)

src/plugin/runtime.js:187

• [nitpick] Consider adding additional error handling or a retry mechanism in the animation loop to avoid the spinner animation stopping unexpectedly if red.setTimeout fails. This can help maintain a smoother user interface experience.

animationTimer = await red.setTimeout(() => animate(), 100);