[mark-sil]

Start here: Src/LexText/Lexicon/FLExBridgeListener.cs -- the whole change is two deleted platform branches.

Removes the two branches in FLExBridgeListener that only ran on Mono or Unix:

• OnFLExLiftBridge (the Send/Receive toolbar button and Ctrl+R) queued the bridge launch on the Mediator's IdleQueue under Mono, to work around a Mono bug where the toolbar button held mouse capture while FLEx Bridge blocked the UI thread. Windows already called RunFLExLiftBridge directly; that call is now the only path.
• OnDisplayCheckForFlexBridgeUpdates hid the Send/Receive > Check for FLEx Bridge Updates... item on Unix. The Windows path (enabled when FLEx Bridge is installed) is now the only path.

The unused SIL.PlatformUtilities using goes with them.

What breaks? Nothing on Windows: each handler keeps exactly the branch Windows always took. The point is one fewer Mediator call (an IdleQueue use) for the Pub/Sub migration to account for. A scan of every other Platform.IsMono / IsUnix check under Src found no other Mono branch holding a Mediator call or a deferral.

Verification

• .\build.ps1 -CommentHygiene -TokenHygiene: passed, 0 warnings.
• .\test.ps1 -CommentHygiene -TokenHygiene -TestProject LexEdDllTests: 47/47 passed.
• No manual test: the removed code never ran on Windows.

Next: approve.

🤖 Generated with Claude Code

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This change is 

[github-actions]

NUnit Tests

    1 files  ±0      1 suites  ±0   14m 5s ⏱️ + 2m 40s
6 868 tests ±0  6 783 ✅ ±0  85 💤 ±0  0 ❌ ±0 
6 877 runs  ±0  6 792 ✅ ±0  85 💤 ±0  0 ❌ ±0 

Results for commit 42140f0. ± Comparison against base commit cf3191a.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.10%. Comparing base (a31e54a) to head (42140f0).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Src/LexText/Lexicon/FLExBridgeListener.cs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1211   +/-   ##
=======================================
  Coverage   40.09%   40.10%           
=======================================
  Files        1544     1544           
  Lines      355320   355309   -11     
  Branches    41359    41357    -2     
=======================================
+ Hits       142456   142481   +25     
+ Misses     183559   183528   -31     
+ Partials    29305    29300    -5     

Files with missing lines	Coverage Δ
Src/LexText/Lexicon/FLExBridgeListener.cs	4.56% <0.00%> (+0.08%)	⬆️

... and 7 files with indirect coverage changes

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[thejambi]

@thejambi reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on mark-sil).