feat: add button and modal to display users (partners) of a company in companies management page

shop/app/admin/companies/page.tsx

@@ -1,7 +1,7 @@
 'use client'
 
 import { useState, useEffect } from 'react'
-import { Building2, Plus, Trash2, Loader2, Pencil, Mail, MapPin, Search } from 'lucide-react'
+import { Building2, Plus, Trash2, Loader2, Pencil, Mail, MapPin, Search, Users } from 'lucide-react'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
@@ -14,6 +14,7 @@ import {
   DialogTitle,
 } from '@/components/ui/dialog'
 import { getCompanies, createCompany, updateCompany, deleteCompany } from '@/lib/actions/companies'
+import { getUsersByCompany } from '@/lib/actions/users'
 
 export default function CompaniesPage() {
   const [companies, setCompanies] = useState<any[]>([])
@@ -32,6 +33,11 @@ export default function CompaniesPage() {
   const [deletingId, setDeletingId] = useState<string | null>(null)
   const [searchQuery, setSearchQuery] = useState('')
 
+  const [isUsersOpen, setIsUsersOpen] = useState(false)
+  const [selectedCompanyForUsers, setSelectedCompanyForUsers] = useState<any>(null)
+  const [companyUsers, setCompanyUsers] = useState<any[]>([])
+  const [loadingUsers, setLoadingUsers] = useState(false)
+
   const loadCompanies = async () => {
     setLoading(true)
     try {
@@ -85,6 +91,20 @@ export default function CompaniesPage() {
     }
   }
 
+  const handleShowUsers = async (company: any) => {
+    setSelectedCompanyForUsers(company)
+    setIsUsersOpen(true)
+    setLoadingUsers(true)
+    try {
+      const data = await getUsersByCompany(company.id)
+      setCompanyUsers(data)
+    } catch (err) {
+      console.error('Fehler beim Laden der Benutzer:', err)
+    } finally {
+      setLoadingUsers(false)
+    }
+  }
+
   const handleDelete = async (id: string, firmName: string) => {
     if (!confirm(`Firma "${firmName}" wirklich löschen? Alle zugewiesenen Partner werden getrennt.`)) return
     setDeletingId(id)
@@ -189,6 +209,15 @@ export default function CompaniesPage() {
                   </td>
                   <td className="py-4 text-right">
                     <div className="flex justify-end gap-2">
+                      <Button
+                        variant="ghost"
+                        size="icon"
+                        onClick={() => handleShowUsers(company)}
+                        className="h-8 w-8 text-indigo-500 hover:text-indigo-400 hover:bg-indigo-500/10"
+                        title="Benutzer anzeigen"
+                      >
+                        <Users className="h-4 w-4" />
+                      </Button>
                       <Button
                         variant="ghost"
                         size="icon"
@@ -312,6 +341,66 @@ export default function CompaniesPage() {
           </form>
         </DialogContent>
       </Dialog>
+
+      {/* Dialog: Benutzer der Firma anzeigen */}
+      <Dialog open={isUsersOpen} onOpenChange={(val) => {
+        setIsUsersOpen(val);
+        if (!val) {
+          setCompanyUsers([]);
+        }
+      }}>
+        <DialogContent className="bg-white dark:bg-slate-950 border-slate-200 dark:border-white/10 text-slate-900 dark:text-white shadow-2xl">
+          <DialogHeader>
+            <DialogTitle>
+              Benutzer von {selectedCompanyForUsers?.name}
+            </DialogTitle>
+            <DialogDescription className="text-slate-500 dark:text-slate-400">
+              Liste aller Benutzer, die dieser Firma zugewiesen sind.
+            </DialogDescription>
+          </DialogHeader>
+          <div className="py-4">
+            {loadingUsers ? (
+              <div className="flex justify-center items-center py-8">
+                <Loader2 className="w-6 h-6 text-indigo-500 animate-spin" />
+                <span className="ml-2 text-slate-400 text-sm">Lade Benutzer...</span>
+              </div>
+            ) : companyUsers.length === 0 ? (
+              <p className="text-center text-slate-500 text-sm py-8">
+                Keine Benutzer für diese Firma registriert.
+              </p>
+            ) : (
+              <div className="space-y-3 max-h-60 overflow-y-auto pr-1">
+                {companyUsers.map((user) => (
+                  <div key={user.id} className="flex justify-between items-center p-3 rounded-lg bg-slate-50 dark:bg-white/5 border border-slate-100 dark:border-white/5">
+                    <div>
+                      <p className="text-sm font-semibold text-slate-900 dark:text-white">
+                        {user.first_name || user.last_name ? `${user.first_name} ${user.last_name}` : 'Kein Name'}
+                      </p>
+                      <p className="text-xs text-slate-500 dark:text-slate-400">
+                        {user.email}
+                      </p>
+                    </div>
+                    <span className={`text-[10px] font-bold uppercase rounded-full px-2.5 py-0.5 border ${
+                      user.role === 'admin' 
+                        ? 'bg-purple-500/10 text-purple-400 border-purple-500/30' 
+                        : user.role === 'gesperrt'
+                        ? 'bg-red-500/10 text-red-400 border-red-500/30'
+                        : 'bg-blue-500/10 text-blue-400 border-blue-500/30'
+                    }`}>
+                      {user.role}
+                    </span>
+                  </div>
+                ))}
+              </div>
+            )}
+          </div>
+          <DialogFooter>
+            <Button onClick={() => { setIsUsersOpen(false); setCompanyUsers([]); }} className="bg-slate-800 hover:bg-slate-700 text-white font-semibold">
+              Schließen
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </div>
   )
 }