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

app/Models/TemplateKey.php

@@ -4,6 +4,7 @@ namespace App\Models;
 
 use App\Enums\TemplateKeyType;
 use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
@@ -27,6 +28,17 @@ class TemplateKey extends Model
         return $this->belongsTo(Template::class);
     }
 
+    /**
+     * Strip any literal curly braces the admin may have copied from the pptx placeholder
+     * (e.g. "{Main Title}" -> "Main Title"), since braces are added automatically at match time.
+     */
+    protected function key(): Attribute
+    {
+        return Attribute::make(
+            set: fn (string $value) => trim($value, "{} \t\n\r\0\x0B"),
+        );
+    }
+
     /**
      * @return array<string, string>
      */