manual audit

[Menelion]

• Start manual audit: remove dead code, extract ChangeSource, consolidate file size formatter
• Remove UI-displayed strings for localizability
• Continue manual audit, move a table from core to database
• Replace null comparison with pattern matching
• Fix bugs in storage; Add Code Style Corrector subagent for Claude Code
• [WIP] fix sync engine
• Finish auditing sync engine; Add local change notifications
• Correct style with Claude agent

[codecov]

Codecov Report

❌ Patch coverage is 67.91745% with 171 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.80%. Comparing base (968d964) to head (d27ebab).

Files with missing lines	Patch %	Lines
src/SharpSync/Storage/WebDavStorage.cs	26.61%	87 Missing and 4 partials ⚠️
src/SharpSync/Sync/SyncEngine.cs	82.83%	31 Missing and 9 partials ⚠️
src/SharpSync/Storage/SftpStorage.cs	50.00%	18 Missing and 2 partials ⚠️
src/SharpSync/Storage/S3Storage.cs	73.68%	7 Missing and 8 partials ⚠️
src/SharpSync/Storage/FtpStorage.cs	76.19%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #58      +/-   ##
==========================================
+ Coverage   76.12%   76.80%   +0.68%     
==========================================
  Files          42       44       +2     
  Lines        4850     4850              
  Branches      684      716      +32     
==========================================
+ Hits         3692     3725      +33     
+ Misses        911      873      -38     
- Partials      247      252       +5     

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