feat(AI): add ai manager admin and create powerpoint with ai

database/migrations/2026_07_17_181548_create_ai_providers_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('ai_providers', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->string('driver')->default('openai');
+            $table->string('model');
+            $table->text('api_key');
+            $table->boolean('is_active')->default(true);
+            $table->boolean('is_default')->default(false);
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('ai_providers');
+    }
+};

database/migrations/2026_07_20_201905_add_base_url_to_ai_providers_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::table('ai_providers', function (Blueprint $table) {
+            $table->string('base_url')->nullable()->after('model');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('ai_providers', function (Blueprint $table) {
+            $table->dropColumn('base_url');
+        });
+    }
+};