v0.9.0: no-MAC device tracking, IP-change dashboard, extended search

database/migrations/2026_07_01_100003_add_scan_config_to_network_segments.php

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+<?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('network_segments', function (Blueprint $table) {
+            // Scan-Zyklus in Minuten: null = manuell, 5/15/30/60/360/1440
+            $table->unsignedInteger('scan_interval_minutes')->nullable()->after('active');
+            // Zeitpunkt des letzten automatischen Scans
+            $table->timestamp('last_scanned_at')->nullable()->after('scan_interval_minutes');
+            // Optionale nmap-Parameter, z.B. "-sn" oder "-sn -p 22,80,443"
+            $table->string('nmap_options')->default('-sn')->after('last_scanned_at');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('network_segments', function (Blueprint $table) {
+            $table->dropColumn(['scan_interval_minutes', 'last_scanned_at', 'nmap_options']);
+        });
+    }
+};

database/migrations/2026_07_02_100001_create_network_ip_notes_table.php

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+<?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::create('network_ip_notes', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('segment_id')->nullable()->index();
+            $table->string('ip_address', 45)->index();
+            $table->text('note')->nullable();
+            $table->unsignedBigInteger('created_by')->nullable();
+            $table->unsignedBigInteger('updated_by')->nullable();
+            $table->timestamps();
+
+            $table->unique(['segment_id', 'ip_address']);
+            $table->foreign('segment_id')->references('id')->on('network_segments')->onDelete('cascade');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('network_ip_notes');
+    }
+};

database/migrations/2026_07_02_200001_make_mac_address_nullable_in_network_devices.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        // MAC-Adresse nullable machen, damit nmap-Hosts ohne MAC als Gerät erfasst werden können.
+        // In MySQL/MariaDB erlaubt UNIQUE NULL mehrere NULL-Werte gleichzeitig.
+        DB::statement('ALTER TABLE network_devices MODIFY mac_address VARCHAR(255) NULL');
+    }
+
+    public function down(): void
+    {
+        // NULL-Einträge entfernen, bevor wir NOT NULL setzen
+        DB::statement("DELETE FROM network_devices WHERE mac_address IS NULL");
+        DB::statement('ALTER TABLE network_devices MODIFY mac_address VARCHAR(255) NOT NULL');
+    }
+};