perf: optimize picker performance with event queue and preview debouncing

[lambdalisue]

Summary

• Optimized event queue consumption with early return pattern and for loops
• Added byte length caching for input component prefix/suffix
• Implemented debounce for preview updates to reduce unnecessary renders
• Optimized processor pipeline to avoid redundant reprocessing

Changes

1. Event Queue Optimization: Replaced while loops with for loops and added early return when queue is empty
2. Byte Length Caching: Cached byte length calculations for input component to avoid repeated computations
3. Preview Debouncing: Added configurable debounce delay (default 150ms) for preview updates to prevent excessive rendering
4. Processor Pipeline: Eliminated redundant processing in the pipeline

Performance Impact

These changes significantly improve the responsiveness of the fall picker, especially when:

• Rapidly navigating through items
• Working with large datasets
• Using resource-intensive previewers

🤖 Generated with Claude Code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.14%. Comparing base (e435174) to head (3bb15e4).
Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #38      +/-   ##
==========================================
+ Coverage   81.77%   82.14%   +0.37%     
==========================================
  Files          26       27       +1     
  Lines        1761     1798      +37     
  Branches      176      185       +9     
==========================================
+ Hits         1440     1477      +37     
  Misses        318      318              
  Partials        3        3              

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