chore(lint): apply eslint auto-fixes across the .tsx backlog

Mechanical --fix output over the newly linted .tsx files (indent,
arrow-parens, comma-dangle, member-delimiter-style, unnecessary type
assertions), plus the three generic-arrow test hooks converted to
function declarations up front: the comma-dangle fixer strips the
<T,> disambiguation comma and turns them into parse errors otherwise.

packages/client/web/src/app.tsx

@@ -26,7 +26,7 @@ export interface AssemblyDeps {
  */
 export function buildRenderApp(deps: AssemblyDeps): () => ReactNode {
   const { ctx } = deps
-  const sessions = ctx.get('sessions') as SessionsService | undefined
+  const sessions = ctx.get('sessions')
   if (sessions === undefined) throw new Error('shell assembly: sessions service unavailable')
   const useSessions = bindSnapshotSelector(sessions.list)
   const SessionDocumentTitle = (): ReactNode => {