Collin c90a7a19a5 Add dialog accessibility semantics ...

Screen readers got no signal that a dialog opened — not one modal carried
role="dialog" — and several close buttons had no accessible name.

- The 6 static tool windows (Brain, Theme, Prompt, Rename session, Cookbook,
  Settings) now carry role="dialog" + an accessible name. They are dockable,
  tiling windows, so they are non-modal dialogs (intentionally no aria-modal).
- The four unlabelled close buttons (theme, prompt, cookbook, settings) get an
  aria-label so they no longer read as just "heavy multiplication x".
- styledConfirm / styledPrompt ARE blocking modals: they get role="dialog" +
  aria-modal="true" + aria-labelledby/aria-describedby, and now manage focus —
  restore focus to the triggering element on close and trap Tab within the
  dialog (they already moved focus in on open).

tests/test_dialog_aria.py pins the roles, labels, and focus management.

2026-06-02 12:41:25 +09:00

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