feat(03-03): replace display strings in page files A-D with VOCAB constants

- AgentDetail: hire verb uses VOCAB.hire
- ApprovalDetail: Board identity uses VOCAB.board
- CliAuth: appName and board uses VOCAB; client fallback uses 'nexus cli'
- Companies: button labels use VOCAB.company
- CompanyExport: CEO role label, README text, export header use VOCAB
- CompanySettings: breadcrumb, Staffing section, approval labels, OpenClaw template use VOCAB
- CompanySkills: paperclip skill source label uses VOCAB.appName
- Dashboard: welcome and select messages use VOCAB.appName and VOCAB.company
- Approvals: VOCAB imported (no string changes needed)

ui/src/pages/Approvals.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useState } from "react";
+import { VOCAB } from "@paperclipai/branding";
 import { useNavigate, useLocation } from "@/lib/router";
 import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
 import { approvalsApi } from "../api/approvals";