diff --git a/.agents/skills/second-brain/skill.md b/.agents/skills/second-brain/skill.md
new file mode 100644
index 0000000..1fc0914
--- /dev/null
+++ b/.agents/skills/second-brain/skill.md
@@ -0,0 +1,11 @@
+---
+name: second-brain
+description: Verwaltet und aktualisiert die projektspezifische Wissensdatenbank (Second Brain Wiki) im Ordner `.brain/`.
+---
+Du bist der Wissens-Architekt des Projekts. Deine Aufgabe ist es, eine strukturierte Markdown-Wissensdatenbank im Ordner `.brain/` im Projekt-Root zu führen.
+
+**Deine Kernaufgaben bei Aktivierung:**
+1. Falls der Ordner `.brain/` oder die `index.md` nicht existieren, lege sie sofort strukturiert an.
+2. Wenn du Code-Änderungen vornimmst, neue Features baust oder Fehler behebst, aktualisiere die betroffene Dokumentation im `.brain/`-Ordner autonom.
+3. Dokumentiere hierbei: Technische Entscheidungen (Architecture Decision Records - ADRs), geänderte Tabellen-Strukturen, Edge-Cases in der Business-Logik und API-Schnittstellen.
+4. Halte alle Einträge extrem präzise, modular und frei von Redundanzen.
diff --git a/funktionen.md b/.agentsspec
similarity index 100%
rename from funktionen.md
rename to .agentsspec
diff --git a/shop/app/my-orders/page.tsx b/shop/app/my-orders/page.tsx
index ffa7154..38292af 100644
--- a/shop/app/my-orders/page.tsx
+++ b/shop/app/my-orders/page.tsx
@@ -10,12 +10,14 @@ import type { Order } from '@/lib/types'
 const statusLabel: Record<string, string> = {
   pending: 'Eingegangen',
   active: 'In Bearbeitung',
+  completed: 'Abgeschlossen',
   cancelled: 'Storniert',
 }
 
 const statusClass: Record<string, string> = {
   pending: 'bg-amber-500/20 text-amber-400 border-amber-500/30',
   active: 'bg-green-500/20 text-green-400 border-green-500/30',
+  completed: 'bg-blue-500/20 text-blue-400 border-blue-500/30',
   cancelled: 'bg-red-500/20 text-red-400 border-red-500/30',
 }
 
diff --git a/shop/lib/actions/end-customers.ts b/shop/lib/actions/end-customers.ts
index e52ce57..5b10828 100644
--- a/shop/lib/actions/end-customers.ts
+++ b/shop/lib/actions/end-customers.ts
@@ -167,17 +167,17 @@ export async function anonymizeEndCustomer(id: string): Promise<void> {
     .from('end_customers')
     .update({
       company_name: '[GELÖSCHT]',
-      vat_id: null,
+      vat_id: '[GELÖSCHT]',
       first_name: '[GELÖSCHT]',
       last_name: '[GELÖSCHT]',
       street: '[GELÖSCHT]',
-      zip: null,
-      city: null,
-      email: null,
-      bank_iban: null,
-      bank_bic: null,
-      bank_name: null,
-      bank_owner: null,
+      zip: '[GELÖSCHT]',
+      city: '[GELÖSCHT]',
+      email: '[GELÖSCHT]',
+      bank_iban: '[GELÖSCHT]',
+      bank_bic: '[GELÖSCHT]',
+      bank_name: '[GELÖSCHT]',
+      bank_owner: '[GELÖSCHT]',
       is_anonymized: true,
     })
     .eq('id', id)
diff --git a/shop/lib/actions/orders.ts b/shop/lib/actions/orders.ts
index e5c9850..48fc5ac 100644
--- a/shop/lib/actions/orders.ts
+++ b/shop/lib/actions/orders.ts
@@ -1,6 +1,7 @@
 'use server'
 
 import { createClient } from '@/lib/supabase/server'
+import { createHash } from 'crypto'
 import { createAdminClient } from '@/lib/supabase/admin'
 import { revalidatePath } from 'next/cache'
 import { sendMail } from '@/utils/mail'
@@ -25,18 +26,12 @@ function generateOrderNumber(): string {
 }
 
 /**
- * Erstellt einen einfachen deterministischen Hash aus dem Bestell-Snapshot.
+ * Erstellt einen SHA-256 Hash aus dem Bestell-Snapshot.
  * Wird für den Idempotenz-Guard verwendet (verhindert Doppelbestellungen).
  */
 function hashOrderSnapshot(snapshot: object): string {
   const str = JSON.stringify(snapshot)
-  let hash = 0
-  for (let i = 0; i < str.length; i++) {
-    const char = str.charCodeAt(i)
-    hash = ((hash << 5) - hash) + char
-    hash = hash & hash // 32-bit integer
-  }
-  return Math.abs(hash).toString(36)
+  return createHash('sha256').update(str).digest('hex')
 }
 
 // ─── submitOrder ──────────────────────────────────────────────────────────────
@@ -155,16 +150,16 @@ export async function submitOrder(params: {
   const customerSnapshot = buildCustomerSnapshot(customerProfile, endCustomer ?? null)
   const orderSnapshot = buildOrderSnapshot(selections, dbProducts, dbCategories, billingInterval, moduleQuantities, lastLicenseDate)
 
-  // 2. Idempotenz-Guard: Prüfen ob identische Bestellung in den letzten 30s existiert
+  // 2. Idempotenz-Guard: Prüfen ob identische Bestellung in den letzten 5 Minuten existiert
   const orderHash = hashOrderSnapshot(orderSnapshot)
-  const thirtySecondsAgo = new Date(Date.now() - 30_000).toISOString()
+  const fiveMinutesAgo = new Date(Date.now() - 5 * 60_000).toISOString()
 
   const { data: existingOrder } = await supabase
     .from('orders')
     .select('*')
     .eq('user_id', user.id)
     .eq('order_hash', orderHash)
-    .gte('created_at', thirtySecondsAgo)
+    .gte('created_at', fiveMinutesAgo)
     .maybeSingle()
 
   if (existingOrder) {
diff --git a/shop/lib/supabase/admin.ts b/shop/lib/supabase/admin.ts
index b6915f2..734d5ce 100644
--- a/shop/lib/supabase/admin.ts
+++ b/shop/lib/supabase/admin.ts
@@ -1,11 +1,15 @@
 import { createClient } from '@supabase/supabase-js'
 
 export function createAdminClient() {
-  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY || 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6InNlcnZpY2Vfcm9sZSIsImV4cCI6MTk4MzgxMjk5Nn0.EGIM96RAZx35lJzdJsyH-qQwv8Hdp7fsn3W0YpN81IU'
   const supabaseUrl = process.env.SUPABASE_URL || process.env.NEXT_PUBLIC_SUPABASE_URL;
-  
+  const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
+
+  if (!supabaseUrl || !serviceRoleKey) {
+    throw new Error('SUPABASE_URL and SUPABASE_SERVICE_ROLE_KEY must be set in environment variables.');
+  }
+
   return createClient(
-    supabaseUrl!,
+    supabaseUrl,
     serviceRoleKey,
     {
       auth: {
@@ -15,3 +19,4 @@ export function createAdminClient() {
     }
   )
 }
+
diff --git a/shop/supabase/migrations/20260706220000_fix_critical_rls_policies.sql b/shop/supabase/migrations/20260706220000_fix_critical_rls_policies.sql
new file mode 100644
index 0000000..215837a
--- /dev/null
+++ b/shop/supabase/migrations/20260706220000_fix_critical_rls_policies.sql
@@ -0,0 +1,104 @@
+-- Migration: Fix critical RLS security issues
+-- 1. Restrict products/modules/categories CRUD to admin role only
+-- 2. Restrict settings table to admin role only
+-- 3. Remove USING(true) wildcard policies on companies/partners
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 1. Products: Replace overly permissive CRUD policies with admin-only
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Allow authenticated insert on products" ON public.products;
+DROP POLICY IF EXISTS "Allow authenticated update on products" ON public.products;
+DROP POLICY IF EXISTS "Allow authenticated delete on products" ON public.products;
+
+CREATE POLICY "Admin insert products" ON public.products FOR INSERT
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin update products" ON public.products FOR UPDATE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin delete products" ON public.products FOR DELETE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 2. Product Modules: Same fix
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Allow authenticated insert on product_modules" ON public.product_modules;
+DROP POLICY IF EXISTS "Allow authenticated update on product_modules" ON public.product_modules;
+DROP POLICY IF EXISTS "Allow authenticated delete on product_modules" ON public.product_modules;
+
+CREATE POLICY "Admin insert product_modules" ON public.product_modules FOR INSERT
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin update product_modules" ON public.product_modules FOR UPDATE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin delete product_modules" ON public.product_modules FOR DELETE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 3. Categories: Same fix
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Allow authenticated insert on categories" ON public.categories;
+DROP POLICY IF EXISTS "Allow authenticated update on categories" ON public.categories;
+DROP POLICY IF EXISTS "Allow authenticated delete on categories" ON public.categories;
+
+CREATE POLICY "Admin insert categories" ON public.categories FOR INSERT
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin update categories" ON public.categories FOR UPDATE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin delete categories" ON public.categories FOR DELETE
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 4. Settings: Restrict to admin-only (contains SMTP credentials!)
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Allow authenticated read on settings" ON public.settings;
+DROP POLICY IF EXISTS "Allow authenticated write on settings" ON public.settings;
+
+CREATE POLICY "Admin read settings" ON public.settings FOR SELECT
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+CREATE POLICY "Admin write settings" ON public.settings FOR ALL
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin')
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 5. Companies: Remove USING(true) wildcard, service_role bypasses RLS anyway
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Service role kann alles Unternehmen" ON public.companies;
+DROP POLICY IF EXISTS "Service role kann alles Partner" ON public.partners;
+
+-- Admin-only write access for companies
+CREATE POLICY "Admin manage companies" ON public.companies FOR ALL
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin')
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- Admin-only write access for partners
+CREATE POLICY "Admin manage partners" ON public.partners FOR ALL
+  USING ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin')
+  WITH CHECK ((SELECT role FROM public.users WHERE id = auth.uid()) = 'admin');
+
+-- ═══════════════════════════════════════════════════════════════════════════════
+-- 6. Orders: Add INSERT policy with company_id check
+-- ═══════════════════════════════════════════════════════════════════════════════
+
+DROP POLICY IF EXISTS "Users can create their own orders" ON public.orders;
+
+CREATE POLICY "Users can create their own orders" ON public.orders FOR INSERT
+  WITH CHECK (
+    auth.uid() = user_id
+    AND (
+      (SELECT role FROM public.users WHERE id = auth.uid()) = 'admin'
+      OR (SELECT company_id FROM public.users WHERE id = auth.uid()) IS NOT NULL
+    )
+  );
+
+-- Reload Schema Cache
+NOTIFY pgrst, 'reload schema';