Chose Option A from the follow-up brief: useImpersonationStore
already holds an `ImpersonationState` ref hydrated from
sessionStorage at store-init and exposes the active impersonation
target user as a public `targetUserId` computed. The store is the
canonical source; sessionStorage is just its persistence sidecar.
Adds a fifth callback `getImpersonationTargetUserId: () => string
| null` to AxiosBindingsDeps and replaces the
sessionStorage.getItem('crewli_impersonation') + JSON.parse block
in the request interceptor with a single `deps.getImpersonationTargetUserId()`
call. The bindings plugin wires it to
`useImpersonationStore().targetUserId`.
After this commit lib/axios.ts has zero references to
sessionStorage and zero magic strings about impersonation
persistence — the only persistence-mechanism knowledge left is in
useImpersonationStore (where it belongs) and in
plugins/3.axios-bindings.ts (allowed to know about stores). The
HTTP module is now unambiguously pure infrastructure.
Behavior preserved 1:1: the store hydrates from sessionStorage
synchronously inside the defineStore factory, so the very first
HTTP request after page load sees the same target user id as
before.
Co-Authored-By: Claude <noreply@anthropic.com>