++ fix: use months for assignment PDF link TTL instead of hours

database/migrations/2026_04_08_120000_add_assignment_link_ttl_hours_to_settings_table.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('settings', function (Blueprint $table) {
+            $table->unsignedInteger('assignment_link_ttl_hours')->default(24)->after('home_limit_list');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('settings', function (Blueprint $table) {
+            $table->dropColumn('assignment_link_ttl_hours');
+        });
+    }
+};

database/migrations/2026_04_08_120100_add_pdf_access_code_to_assegnazioni_table.php

@@ -0,0 +1,23 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('assegnazioni', function (Blueprint $table) {
+            $table->string('pdf_access_code', 32)->nullable()->unique()->after('campaign_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('assegnazioni', function (Blueprint $table) {
+            $table->dropUnique(['pdf_access_code']);
+            $table->dropColumn('pdf_access_code');
+        });
+    }
+};

database/migrations/2026_04_08_123500_convert_assignment_link_ttl_hours_to_months.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        DB::table('settings')
+            ->whereNotNull('assignment_link_ttl_hours')
+            ->update([
+                'assignment_link_ttl_hours' => DB::raw('GREATEST(1, CEIL(assignment_link_ttl_hours / 720))'),
+            ]);
+    }
+
+    public function down(): void
+    {
+        DB::table('settings')
+            ->whereNotNull('assignment_link_ttl_hours')
+            ->update([
+                'assignment_link_ttl_hours' => DB::raw('assignment_link_ttl_hours * 720'),
+            ]);
+    }
+};