test: adapt suites to the provider-hosted conversation shell

Test-side catch-up with the session-maybe conversation architecture: the
provide channel's descriptor shape and maybeProvideInfo in fakes, the shared
chat-store handle asserted on conversation.session (the session-maybe shell
carries no store), startSession fakes exposing the workspace list snapshot,
strict session slots declining (not throwing) without a session, AppFrame's
removed empty seat and loading gate, and the hero draft asserted on the
machine (the chat-store mirror binds with ConversationSession). Plus three
lint fixes (max-len split, boolean-compare, arrow-parens/unbound-method).

packages/client/ui-workspace/tests/apply.spec.ts

@@ -19,7 +19,10 @@ async function bench() {
   const insertSessionBefore = vi.fn(async () => ({}))
   const open = vi.fn()
   const clear = vi.fn()
-  ctx.provide('workspaces', { create, connectWorkspace, rename, insertSessionBefore } as never)
+  ctx.provide('workspaces', {
+    create, connectWorkspace, rename, insertSessionBefore,
+    list: { getSnapshot: () => ({ recentWorkspaceId: undefined }) },
+  } as never)
   ctx.provide('sessions', { open, clear } as never)
   return { ctx, slots: ctx.get('slots') as SlotsService, create, connectWorkspace, rename, insertSessionBefore, open, clear }
 }