Fix color regressions, add priority color (#37417)

- fix markup attention block regressions on 2 colors
- added new color "priority" color for important severity in markup
- all message-box style, and error form elements use monochrome text
- tweaked and improved action logs colors

Co-authored-by: Claude (Opus 4.7) <noreply@anthropic.com>

routers/web/devtest/mock_actions.go

@@ -39,6 +39,10 @@ func generateMockStepsLog(logCur actions.LogCursor, opts generateMockStepsLogOpt
 		"##[group]test group for: step={step}, cursor={cursor}",
 		"in group msg for: step={step}, cursor={cursor}",
 		"##[endgroup]",
+		"::error::mock error for: step={step}, cursor={cursor}",
+		"::warning::mock warning for: step={step}, cursor={cursor}",
+		"::notice::mock notice for: step={step}, cursor={cursor}",
+		"::debug::mock debug for: step={step}, cursor={cursor}",
 	)
 	// usually the cursor is the "file offset", but here we abuse it as "line number" to make the mock easier, intentionally
 	cur := logCur.Cursor