Merges 71 commits from main. Headline content: the Tests/Manual
integration test suite revived and reorganized after long disuse
(renames, new applications, updated cibs), restoring a large
integration validation surface. Functional fixes include replacing
unload-based termination with pagehide (back/forward cache
compatibility) and hardening CPTextField's input-element handling.
Conflict resolutions (local versions retained):
- AppKit/CPTextField.j: main's input-element logic carried, with this
branch's preprocessor-removal sweep re-applied on top. Main's
conditionals are re-expressed as runtime CPDOMAvailable guards; the
_inputElement method-definition gate is retained.
- AppKit/Platform/CPPlatform.j: the DOM platform implementation stays
inlined under the PLATFORM(DOM) gate. The split layout breaks the
legacy build: the include fragment is compiled standalone by the
source walk and cannot resolve its superclass. Main's pagehide
termination fix is ported into the inlined section; the restored
AppKit/Platform/DOM/CPPlatform.j fragment is deleted.
Verified: legacy build green through Foundation, AppKit and Tools;
Tests/Manual suite passing.
David Richardson
eda11e38ba