chore(lint): disable prefer-importing-vitest-globals

vitest plugin ships both prefer-importing-vitest-globals (wants explicit
imports) and no-importing-vitest-globals (wants globals) enabled by
default, so oxlint --fix flips test files between the two warnings on
every run. vitest.config sets globals: true and every test file in
VueApp/src uses the globals form, so disable the prefer- rule to match
the established convention.

Author: rlorenzo

.oxlintrc.json

@@ -129,6 +129,7 @@
                 ],
                 "vitest/prefer-called-times": "off", // Conflicts with prefer-called-once; toHaveBeenCalledOnce() is more readable
                 "vitest/prefer-import-in-mock": "off", // import() form in vi.mock causes TS errors with partial class mocks
+                "vitest/prefer-importing-vitest-globals": "off", // Directly conflicts with no-importing-vitest-globals; vitest.config sets globals:true and no test file imports
                 "vitest/prefer-strict-boolean-matchers": "off", // Conflicts with prefer-to-be-truthy; we use .toBeTruthy()/.toBeFalsy()
                 "vitest/require-test-timeout": "off" // Disabled intentionally; test files are not required to declare per-test timeouts
             }