ui: new api call design

- api functions exist under api.*
- they accept an abort signal and return a promise
- they can be swapped out at build time depending on the platform
  (e.g.,window.method on desktop, fetch on mobile)
- TanStack Query functions should only be used in components, and
  only when we need its features, favoring simpler api.* calls

pkgs/clan-app/ui/tsconfig.json

@@ -15,7 +15,8 @@
     "allowJs": true,
     "isolatedModules": true,
     "paths": {
-      "@/*": ["./*"]
+      "@/*": ["./*"],
+      "@api/clan/client": ["./src/api/clan/client-call"]
     }
   }
 }