see comments

lib/supabase/migrations/20260927100100_create_profile_on_signup_trigger.sql

@@ -14,4 +14,8 @@ begin
   );
   return new;
 end;
-$$;
+$$;
+
+create trigger on_auth_user_created
+  after insert on auth.users
+  for each row execute function public.handle_new_user();

modules/admin/actions/client.ts

@@ -1,5 +1,6 @@
 "use server";
 import { createAdminClient } from "@/lib/supabase/admin";
+import { verifySession } from "@/lib/supabase/dal";
 import { generatePassword } from "@/lib/generate-password";
 import * as z from "zod";
 
@@ -20,6 +21,11 @@ export async function createClient(
     formData: FormData
 ): Promise<CreateClientState> {
 
+    const session = await verifySession();
+    if (!session.isAdmin) {
+        return { error: "Keine Berechtigung." }
+    }
+
     const validatedFields = CreateClientSchema.safeParse({
         name: formData.get("name"),
         email: formData.get("email")

modules/admin/queries/clients.ts

@@ -9,7 +9,7 @@ export async function getClients() {
         .eq("role", "client")
         .order("name")
 
-    if (error) return []
+    if (error) throw new Error(`Failed to load clients: ${error.message}`)
 
     return data
 }

modules/admin/ui/components/copy-field.tsx

@@ -1,25 +1,31 @@
 "use client"
 
-import { useState } from "react";
+import { useRef, useState } from "react";
 import { CheckIcon, CopyIcon } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Field, FieldLabel } from "@/components/ui/field";
 
 export function CopyField({ label, value }: { label: string; value: string }) {
-    const [copied, setCopied] = useState(false);
+    const [status, setStatus] = useState<"idle" | "copied" | "error">("idle");
+    const inputRef = useRef<HTMLInputElement>(null);
 
     async function handleCopy() {
-        await navigator.clipboard.writeText(value);
+        try {
-        setCopied(true);
+            await navigator.clipboard.writeText(value);
-        setTimeout(() => setCopied(false), 1500);
+            setStatus("copied");
+        } catch {
+            inputRef.current?.select();
+            setStatus("error");
+        }
+        setTimeout(() => setStatus("idle"), 1500);
     }
 
     return (
         <Field>
             <FieldLabel>{label}</FieldLabel>
             <div className="flex items-center gap-2">
-                <Input value={value} readOnly className="focus-visible:ring-0" />
+                <Input ref={inputRef} value={value} readOnly className="focus-visible:ring-0" />
                 <Button
                     type="button"
                     variant="outline"
@@ -28,9 +34,18 @@ export function CopyField({ label, value }: { label: string; value: string }) {
                     onClick={handleCopy}
                     aria-label={`${label} kopieren`}
                 >
-                    {copied ? <CheckIcon className="text-signal-success" /> : <CopyIcon />}
+                    {status === "copied" ? (
+                        <CheckIcon className="text-signal-success" />
+                    ) : (
+                        <CopyIcon />
+                    )}
                 </Button>
             </div>
+            {status === "error" && (
+                <p className="text-small text-destructive">
+                    Kopieren fehlgeschlagen — Text wurde markiert, bitte manuell kopieren.
+                </p>
+            )}
         </Field>
     )
 }