CmuxWebViewKeyEquivalentTests.swift grew to 15,907 lines with 100+ test classes.
Swift compiles per-file, so this single file serialized all type-checking onto one
compiler process, pushing CI past the 20-minute timeout after core-file changes.
Split into 10 domain-based files (1k-3k lines each) so Xcode can compile them in
parallel. Also bump timeout-minutes from 20 to 30 for headroom, stream xcodebuild
output via tee instead of capturing to a variable (makes CI logs debuggable), and
add 5 test files that were missing from the pbxproj Sources build phase.
Co-authored-by: Lawrence Chen <lawrencecchen@users.noreply.github.com>
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