fix(db-tools): resolve REINDEX transaction error by executing directly via pg client, and dynamically support all database tables in integrity dashboard

shop/lib/actions/admin.ts

@@ -2,6 +2,7 @@
 
 import { createClient } from '@/lib/supabase/server'
 import { verifyAdmin } from '@/lib/actions/auth'
+import { Client } from 'pg'
 
 export async function getDatabaseIntegrity() {
   try {
@@ -36,12 +37,20 @@ export async function repairDatabaseSchema() {
 export async function optimizeDatabaseIndices() {
   try {
     await verifyAdmin()
-    const supabase = await createClient()
-    const { data, error } = await supabase.rpc('optimize_database_indices')
-    if (error) {
-      return { success: false, error: error.message }
-    }
-    return { success: true, data }
+    
+    // REINDEX cannot be run inside a transaction block (such as inside a PL/pgSQL function).
+    // Therefore, we connect directly using pg client and execute raw query.
+    const connectionString = process.env.DATABASE_URL || 'postgresql://postgres:postgres@localhost:54322/postgres';
+    const client = new Client({
+      connectionString,
+      connectionTimeoutMillis: 10000,
+    });
+    
+    await client.connect();
+    await client.query('REINDEX SCHEMA public;');
+    await client.end();
+    
+    return { success: true }
   } catch (err: any) {
     console.error("Error in optimizeDatabaseIndices:", err)
     return { success: false, error: err.message || "Unerwarteter Fehler bei der Indexoptimierung." }