ref(frontend/admin): fix location of spending page (#9991)

### Changes 🏗️
Moves the route path for spending
drops min

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### Checklist 📋

#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
  <!-- Put your test plan here: -->
  - [x] test locally

---------

Co-authored-by: Bently <Github@bentlybro.com>

autogpt_platform/frontend/src/components/admin/spending/add-money-button.tsx

@@ -14,7 +14,7 @@ import { Label } from "@/components/ui/label";
 import { Textarea } from "@/components/ui/textarea";
 import { Input } from "@/components/ui/input";
 import { useRouter } from "next/navigation";
-import { addDollars } from "@/app/admin/spending/actions";
+import { addDollars } from "@/app/(platform)/admin/spending/actions";
 import useCredits from "@/hooks/useCredits";
 
 export function AdminAddMoneyButton({
@@ -99,7 +99,6 @@ export function AdminAddMoneyButton({
                     id="dollarAmount"
                     type="number"
                     step="0.01"
-                    min="0"
                     className="rounded-l-none"
                     value={dollarAmount}
                     onChange={(e) => setDollarAmount(e.target.value)}

autogpt_platform/frontend/src/components/admin/spending/admin-grant-history-data-table.tsx

@@ -9,7 +9,7 @@ import {
 
 import { PaginationControls } from "../../ui/pagination-controls";
 import { SearchAndFilterAdminSpending } from "./search-filter-form";
-import { getUsersTransactionHistory } from "@/app/admin/spending/actions";
+import { getUsersTransactionHistory } from "@/app/(platform)/admin/spending/actions";
 import { AdminAddMoneyButton } from "./add-money-button";
 import { CreditTransactionType } from "@/lib/autogpt-server-api";