chore(web): address Copilot review on #2127

- Move REPLAYABLE_PROTOCOL_METHODS / isReplayableProtocolMethod out of
  components/groups/protocolUtils.ts into utils/replayableProtocolMethods.ts.
  It is a pure predicate over a string set, so by the project's own lib-vs-utils
  rule it never belonged under components/ — and keeping it there was what made
  lib/protocolReplay.ts import 'up' into the component graph. Both consumers now
  import from utils/; the predicate keeps its own test.

- Give replayProtocolRequest an exported ReplayClient = Pick<InspectorClient, ...>
  naming the nine methods it calls, so a caller (and the test) can satisfy the
  real contract instead of casting a stub into a whole client.

- Rebuild the protocolReplay fixtures as plain typed MessageEntry values. The
  double cast had been hiding a real defect: MessageEntry.timestamp is a Date
  and the fixture passed a number, so the assertion confirmed a shape
  messagesToLogEntries cannot produce.

- Replace the window casts in authToken.test.ts with Reflect.set /
  Reflect.deleteProperty. No 'as unknown as' remains in either test.

- Drop the stale 'floats top-right' sentence on ReAuthBannerBar, which moved
  verbatim and arrived contradicting the paragraph below it.

Declined: re-homing ReAuthBannerBar's transform/zIndex as a theme variant.
'styles' is the Styles API rather than an inline style, Mantine exposes neither
property as a prop, and a styling change is out of scope for a phase whose
safety argument is that nothing was edited.

Signed-off-by: cliffhall <cliff@futurescale.com>

clients/web/src/components/groups/ProtocolEntry/ProtocolEntry.tsx

@@ -30,8 +30,8 @@ import {
   extractMethod,
   extractResultType,
   extractSubscriptionId,
-  isReplayableProtocolMethod,
 } from "../protocolUtils.js";
+import { isReplayableProtocolMethod } from "../../../utils/replayableProtocolMethods";
 
 export interface ProtocolEntryProps {
   entry: MessageEntry;