* Widen the macOS title-bar drag strips so the window is easy to move
With titleBarStyle: "hidden" there is no native title bar, so the macOS window can only be
moved via the -webkit-app-region: drag strips above the room and left-panel headers. Those
strips were only ~13-24px tall and too thin to reliably grab, making the window awkward to
move.
Raise the drag strips above the room, left-panel and space headers to 32px (matching the
traffic-light offset already used elsewhere in the file) for a comfortable grab zone;
interactive controls keep -webkit-app-region: no-drag so they stay clickable. The injected CSS
is also extracted into a pure buildTitleBarCss() helper so the string contract can be
unit-tested.
* Address review: use author copyright, cover setupMacosTitleBar, drop dead selector
Use my own copyright on the new test file rather than New Vector's.
Add tests for setupMacosTitleBar() itself: the platform guard and the
enter-full-screen / leave-full-screen / did-finish-load lifecycle were
previously never executed, leaving the diff below the 80% coverage gate.
Drop the .mx_LeftPanel_newRoomList::before rule: #34040 removed that class
from the product, so the rule matched nothing and the border-right it carried
was silently lost from the left panel. Fold it back into .mx_LeftPanel::before,
with a regression test covering the separator.
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Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>
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