Add initial Todo items and CalDAV sync

database/migrations/2025_11_28_000000_create_todo_table.php

@@ -0,0 +1,32 @@
+<?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('todos', function (Blueprint $table) {
+            $table->string('id')->primary(); // ical UID
+            $table->string('etag')->nullable(); // ical etag
+            $table->string('title');
+            $table->text('description')->nullable();
+            $table->foreignId('type_id')->nullable()->constrained('todo_types')->nullOnDelete();
+            $table->string('url')->nullable();
+            $table->timestamp('due_date')->nullable();
+            $table->text('recurring')->nullable(); // RRULE
+            $table->tinyInteger('priority')->nullable();
+            $table->string('status')->nullable(); // e.g. IN-PROCESS, NEEDS-ACTION
+            $table->timestamp('created_at')->nullable(); // iCal CREATED
+            $table->timestamp('last_modified')->nullable(); // iCal LAST-MODIFIED
+            $table->string('parent')->nullable()->index(); // RELATED-TO (parent UID)
+            $table->string('object')->nullable(); // RELATED-TO (object reference)
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('todos');
+    }
+};

database/migrations/2025_11_28_000000_create_todo_types_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('todo_types', function (Blueprint $table) {
+            $table->id();
+            $table->string('name')->unique();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('todo_types');
+    }
+};