mavweb: extend test coverage to credentials, signal, dash, history, revert handlers
- New credentials_test.go: 4 test functions covering credentialStore
(new, save, lookup, update, persistence across restarts).
- Extended handlers_test.go: fakeCore now supports WriteFact, Presence,
RecentFacts/Nudges/Notes, RevertFact. Added 7 new test functions:
TestNoCache, TestHandleSignal (5 subtestcases covering method guard,
nil core, unknown key, known key, write error), TestHandleDash (3),
TestHandleHistory (3), TestHandleRevert (6), and ListToolsError 502.
- Fixed history.html: Go html/template requires conditional class
rendered as separate <tr> branches, not inline attribute.
kami
185f4f578e