feat(admin): batch adjust user wallet balances

frontend/src/api/__tests__/users.spec.ts

@@ -17,7 +17,7 @@ vi.mock('@/utils/cache', () => ({
   cachedRequest: cachedRequestMock,
 }))
 
-import { usersApi } from '@/api/users'
+import { buildUserBatchBalanceAdjustmentPayload, usersApi } from '@/api/users'
 
 describe('usersApi admin list query', () => {
   beforeEach(() => {
@@ -104,3 +104,25 @@ describe('usersApi admin list query', () => {
     expect(getMock).toHaveBeenCalledWith('/api/admin/users/target-user/api-keys')
   })
 })
+
+describe('user batch wallet balance payload', () => {
+  it('builds an addition payload from a valid positive amount', () => {
+    expect(buildUserBatchBalanceAdjustmentPayload('add', '12.5')).toEqual({
+      operation: 'add',
+      amount: 12.5,
+    })
+  })
+
+  it('builds a deduction payload from a valid positive amount', () => {
+    expect(buildUserBatchBalanceAdjustmentPayload('deduct', 4)).toEqual({
+      operation: 'deduct',
+      amount: 4,
+    })
+  })
+
+  it('rejects zero, blank, and non-finite amounts', () => {
+    expect(buildUserBatchBalanceAdjustmentPayload('add', '0')).toBeNull()
+    expect(buildUserBatchBalanceAdjustmentPayload('deduct', '')).toBeNull()
+    expect(buildUserBatchBalanceAdjustmentPayload('deduct', '1e999')).toBeNull()
+  })
+})

frontend/src/api/users.ts

@@ -120,9 +120,28 @@ export interface UserBatchRolePayload {
   role: UserRole
 }
 
-export type UserBatchAction = 'enable' | 'disable' | 'update_access_control' | 'update_role'
+export type UserBatchBalanceOperation = 'add' | 'deduct'
 
-export type UserBatchActionPayload = UserBatchAccessControlPayload | UserBatchRolePayload
+export interface UserBatchBalanceAdjustmentPayload {
+  operation: UserBatchBalanceOperation
+  amount: number
+}
+
+export function buildUserBatchBalanceAdjustmentPayload(
+  operation: UserBatchBalanceOperation,
+  amountInput: string | number,
+): UserBatchBalanceAdjustmentPayload | null {
+  const amount = typeof amountInput === 'number' ? amountInput : Number(amountInput.trim())
+  if (!Number.isFinite(amount) || amount <= 0) return null
+  return { operation, amount }
+}
+
+export type UserBatchAction = 'enable' | 'disable' | 'update_access_control' | 'update_role' | 'adjust_wallet_balance'
+
+export type UserBatchActionPayload =
+  | UserBatchAccessControlPayload
+  | UserBatchRolePayload
+  | UserBatchBalanceAdjustmentPayload
 
 export interface UserBatchToggleActionRequest {
   selection: UserBatchSelection
@@ -142,10 +161,17 @@ export interface UserBatchRoleActionRequest {
   payload: UserBatchRolePayload
 }
 
+export interface UserBatchBalanceActionRequest {
+  selection: UserBatchSelection
+  action: 'adjust_wallet_balance'
+  payload: UserBatchBalanceAdjustmentPayload
+}
+
 export type UserBatchActionRequest =
   | UserBatchToggleActionRequest
   | UserBatchAccessControlActionRequest
   | UserBatchRoleActionRequest
+  | UserBatchBalanceActionRequest
 
 export interface UserBatchActionFailure {
   user_id: string