fix(a11y): add ARIA attributes to core UI components

AnimatedModal: ariaLabelledBy prop, EntityCombobox: combobox/listbox
pattern, FilterBar: role="search", SortableColumnHeader: aria-sort,
global-error: html lang attr, eslint label rule depth config.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tooling/eslint/src/nextjs.js

@@ -30,7 +30,10 @@ export default [
       "jsx-a11y/html-has-lang": "warn",
       "jsx-a11y/img-redundant-alt": "warn",
       "jsx-a11y/interactive-supports-focus": "warn",
-      "jsx-a11y/label-has-associated-control": "warn",
+      "jsx-a11y/label-has-associated-control": ["warn", {
+        assert: "either",
+        depth: 3,
+      }],
       "jsx-a11y/no-access-key": "warn",
       "jsx-a11y/no-autofocus": "warn",
       "jsx-a11y/no-distracting-elements": "warn",