fix(test): restore jsdom Web Storage in UI vitest setups on Node 25+

[davion-knight]

Problem

Node 25 shipped a native globalThis.localStorage that evaluates to undefined unless --localstorage-file is passed (nodejs/node#60303, still open). Vitest's jsdom environment copies a window key onto the test global only when that key is in its static allowlist or not already present — localStorage/sessionStorage are in neither. So on Node ≤24 jsdom's real Storage is copied over, but on Node 25+ the key already exists (Node's broken accessor) and the copy is skipped, leaving undefined.

Result: all 6 storage-touching suites in loopover-ui and theme-toggle.test.tsx in loopover-miner-ui throw Cannot read properties of undefined (reading 'clear'). Reported upstream as vitest-dev/vitest#8757 and closed as "non-LTS is not supported", so there is no upstream fix to wait for. .nvmrc pins Node 22, so CI is unaffected today — this is a make-local-dev-work fix that becomes CI-breaking the moment .nvmrc moves past Node 24.

Fix

Restore jsdom's Storage from the raw JSDOM instance vitest exposes as globalThis.jsdom — no Node CLI flags (the flag workarounds are unrecognized by the pinned Node 22, so they would break CI). Uses Object.defineProperty rather than direct assignment, since the DOM lib types localStorage as read-only. A strict no-op on Node ≤24, where the key is absent and jsdom's Storage was already copied.

Verification

Node 22 is what .nvmrc pins and what I have locally, so the broken path can't reproduce here. Instead:

• All 7 affected suites pass unchanged on Node 22 (34 + 4 tests) — confirming the shim is a strict no-op on the pinned version.
• Simulated the exact Node 25 state (key present, value undefined, jsdom Storage on globalThis.jsdom) and ran the shipped loop against it: it restores working localStorage/sessionStorage (setItem/getItem/clear all functional) on the 25+ condition and leaves an already-copied Storage untouched on the ≤24 condition.
• ui:typecheck exits 0; ui:lint reports 0 errors; the two loopover-miner-ui typecheck errors are pre-existing (verified identical with these changes stashed).

Canary test

apps/loopover-ui/src/lib/jsdom-web-storage.test.ts asserts the jsdom environment exposes working localStorage/sessionStorage and that the bare global resolves to the same object as the window property. It passes trivially on Node 22; its job is to fail on one explicit assertion the moment .nvmrc moves past Node 24 with this shim removed, instead of every storage-touching suite failing opaquely.

apps/** is outside Codecov's scope, so no codecov/patch obligation. Test infrastructure only — no visual change.

Closes #7576

[superagent-security]

Superagent didn't find any vulnerabilities or security issues in this PR.

[JSONbored]

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apps/loopover-miner-ui/vitest.setup.ts