Rebuild AgentCompany-New renderer to match design spec

- Port design tokens, sidebar, topbar, and icons to inline SVG set
- Rewrite each page (Home/Team/Work/Chat/Files/Approvals/Social/Settings)
  to drive real snapshot data and match the bento, kanban, three-pane chat,
  file tree + pinned cards, approval queue, social schedule + calendar,
  and settings sub-nav layouts
- Split Chat and Settings into per-concern subcomponents so every file
  stays under 500 lines
- Add schema v4 for pinned files and scheduled posts plus IPC + service
  wiring; cover new behavior in unit tests
- Update onboarding labels and Hire form to remove ambiguity for the
  expanded e2e suite (all settings tabs + 8 routes at 1280 and 980)

AgentCompany-New/src/shared/ipc.ts

@@ -16,7 +16,10 @@ export const IPC_CHANNELS = {
   resolveAgentSkills: "agentcompany:resolve-agent-skills",
   createSocialAccount: "agentcompany:create-social-account",
   launchSocialLogin: "agentcompany:launch-social-login",
+  createScheduledPost: "agentcompany:create-scheduled-post",
+  setScheduledPostState: "agentcompany:set-scheduled-post-state",
   importFile: "agentcompany:import-file",
+  setFilePinned: "agentcompany:set-file-pinned",
   createMigrationReport: "agentcompany:create-migration-report",
   rendererEvent: "agentcompany:renderer-event",
   windowMinimize: "agentcompany:window-minimize",