shim-server-parity.test.ts grew to 838 lines after the recent batch of
element tools added 7 fixture entries. Move the CASES table and the
build* imports to shim-server-parity-cases.ts (a sibling .ts, not
.test.ts so vitest doesn't pick it up as a separate suite); keep the
mocks, helpers, and describe blocks in the test file (now 139 lines).
Both files are well under the repo's 800-line ceiling. vitest's
vi.mock hoisting still works because the mock is registered at the
test file's module-resolution time, before the cases file's imports
resolve — confirmed by the 104 parity assertions still passing.
7ce2b1886e