feat: add member removal functionality with confirmation and error handling

src/app/admin/pool-management/manage/page.tsx

@@ -73,6 +73,8 @@ function PoolManagePageInner() {
   const [hasSearched, setHasSearched] = React.useState(false)
   const [selectedCandidates, setSelectedCandidates] = React.useState<Set<string>>(new Set())
   const [savingMembers, setSavingMembers] = React.useState(false)
+  const [removingMemberId, setRemovingMemberId] = React.useState<string | null>(null)
+  const [removeError, setRemoveError] = React.useState<string>('')
 
   async function fetchMembers() {
     if (!token || !poolId || poolId === 'pool-unknown') return
@@ -211,6 +213,23 @@ function PoolManagePageInner() {
     }
   }
 
+  async function removeMember(userId: string) {
+    if (!token || !poolId || poolId === 'pool-unknown') return
+    const user = users.find(u => u.id === userId)
+    const label = user?.name || user?.email || 'this user'
+    if (!window.confirm(`Remove ${label} from this pool?`)) return
+    setRemoveError('')
+    setRemovingMemberId(userId)
+    try {
+      await AdminAPI.removePoolMembers(token, poolId, [userId])
+      await fetchMembers()
+    } catch (e: any) {
+      setRemoveError(e?.message || 'Failed to remove user from pool.')
+    } finally {
+      setRemovingMemberId(null)
+    }
+  }
+
   return (
     <PageTransitionEffect>
       <div className="min-h-screen flex flex-col bg-gradient-to-tr from-blue-50 via-white to-blue-100">
@@ -302,6 +321,11 @@ function PoolManagePageInner() {
                   Add User
                 </button>
               </div>
+              {removeError && (
+                <div className="mb-4 rounded-md border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-700">
+                  {removeError}
+                </div>
+              )}
               <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6">
                 {users.map(u => (
                   <article key={u.id} className="rounded-2xl bg-white border border-gray-100 shadow p-5 flex flex-col">
@@ -325,6 +349,15 @@ function PoolManagePageInner() {
                         {new Date(u.joinedAt).toLocaleDateString('de-DE', { year: 'numeric', month: 'short', day: '2-digit' })}
                       </span>
                     </div>
+                    <div className="mt-4 flex justify-end">
+                      <button
+                        onClick={() => removeMember(u.id)}
+                        disabled={removingMemberId === u.id}
+                        className="px-3 py-2 text-xs font-medium rounded-lg border border-red-200 bg-red-50 text-red-700 hover:bg-red-100 transition disabled:opacity-60 disabled:cursor-not-allowed"
+                      >
+                        {removingMemberId === u.id ? 'Removing…' : 'Remove'}
+                      </button>
+                    </div>
                   </article>
                 ))}
                 {membersLoading && (
@@ -392,7 +425,7 @@ function PoolManagePageInner() {
                     </button>
                     <button
                       type="button"
-                      onClick={() => { setQuery(''); setCandidates([]); setHasSearched(false); setError(''); }}
+                      onClick={() => { setQuery(''); setError(''); }}
                       className="rounded-md border border-gray-300 bg-white px-3 py-2 text-sm text-gray-700 hover:bg-gray-50 transition"
                     >
                       Clear

src/app/admin/pool-management/page.tsx

@@ -81,6 +81,8 @@ export default function PoolManagementPage() {
   }
 
   async function handleArchive(poolId: string) {
+    const confirmed = window.confirm('Archive this pool? Users will no longer be able to join or use it.')
+    if (!confirmed) return
     setArchiveError('')
     const res = await setPoolInactive(poolId)
     if (res.ok) {
@@ -91,6 +93,8 @@ export default function PoolManagementPage() {
   }
 
   async function handleSetActive(poolId: string) {
+    const confirmed = window.confirm('Unarchive this pool and make it active again?')
+    if (!confirmed) return
     setArchiveError('')
     const res = await setPoolActive(poolId)
     if (res.ok) {