feat: add category management

associate with entries and text widgets

database/migrations/2026_01_08_214229_create_categories_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('categories', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('categories');
+    }
+};

database/migrations/2026_01_08_215025_add_category_id_to_text_widgets_table.php

@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('text_widgets', function (Blueprint $table) {
+            $table->foreignId('category_id')->nullable()->constrained('categories');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('text_widgets', function (Blueprint $table) {
+            $table->dropForeign(['category_id']);
+            $table->dropColumn('category_id');
+        });
+    }
+};

database/migrations/2026_01_08_215405_add_category_id_to_entries_table.php

@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('entries', function (Blueprint $table) {
+            $table->foreignId('category_id')->nullable()->constrained('categories');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('entries', function (Blueprint $table) {
+            $table->dropForeign(['category_id']);
+            $table->dropColumn('category_id');
+        });
+    }
+};