refactor: make prompt templates DB-only system prompts

Remove all hardcoded defaults from PromptTemplateService — the DB record
is now mandatory and render() throws if a key is missing. Admin UI
disables new/delete and makes the key field read-only so system prompts
cannot be renamed or removed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Infrastructure/AI/PromptTemplateService.php

@@ -8,68 +8,6 @@ use App\Domain\AI\Repository\PromptTemplateRepositoryInterface;
 
 final class PromptTemplateService
 {
-    /** @var array<string, string> */
-    private const array DEFAULTS = [
-        'specs_research' => <<<'PROMPT'
-You are a hardware specifications expert. Extract the technical specifications for the {{articleType}}: "{{subject}}".
-
-Web search results:
-{{searchResults}}
-
-Based on the search results above, list all technical specifications including:
-processor, RAM, storage variants, display size and resolution, GPU, battery capacity,
-ports, connectivity, weight, dimensions, OS, and any other relevant specs.
-Be specific and accurate. If a spec is not found in the search results, omit it rather than guessing.
-PROMPT,
-
-        'ebay_title' => <<<'PROMPT'
-Create a concise eBay listing title (max 80 characters) for this {{typeName}}.
-Device: {{deviceLabel}}
-Use the most important specifications. Include condition if not "new".
-Condition: {{condition}}
-{{specsSection}}
-Return ONLY the title text, no quotes, no explanation.
-PROMPT,
-
-        'ebay_description' => <<<'PROMPT'
-Create a professional eBay listing description in German for this {{typeName}}.
-Device: {{deviceLabel}}
-Include all available specifications in a clear, structured format.
-Mention the condition: {{condition}}.
-{{conditionNotes}}
-{{specsSection}}
-Use HTML formatting (ul, li, strong tags). Max 2000 characters.
-PROMPT,
-
-        'vision_analyze' => <<<'PROMPT'
-Look at this nameplate/label photo of IT hardware.
-Extract the manufacturer, any model identifier (name or number), and serial number visible on the label.
-If the label shows both a product name (e.g. "ThinkPad T490s") and a separate part/product code (e.g. "20NXS0BA00"), put the product name in MODEL_NAME and the code in MODEL_NUMBER.
-If only one model field is visible, put it in MODEL_NAME and leave MODEL_NUMBER completely empty.
-MODEL_NUMBER must never contain the serial number.
-Do not guess or add information not visible on the label.
-Respond in exactly this format:
-MANUFACTURER: Lenovo
-MODEL_NAME: ThinkBook 14 G6 IRL
-MODEL_NUMBER:
-SERIAL: PNV09SJZ
-Use empty string (nothing after the colon) when a field is not visible.
-PROMPT,
-
-        'json_coding' => <<<'PROMPT'
-Convert the following hardware specifications to a JSON object.
-The JSON must use these exact keys (UUIDs) and follow the indicated value formats:
-
-{{schema}}
-{{missingHint}}
-Specifications text:
-{{specsText}}
-
-Return ONLY valid JSON. No explanation. No markdown. No extra text.
-JSON:
-PROMPT,
-    ];
-
     public function __construct(
         private readonly PromptTemplateRepositoryInterface $repository,
     ) {
@@ -83,9 +21,11 @@ PROMPT,
     public function render(string $key, array $variables = []): string
     {
         $template = $this->repository->findByKey($key);
-        $body = $template?->getBody() ?? self::DEFAULTS[$key]
-            ?? throw new \InvalidArgumentException("Unknown prompt template key: {$key}");
+        if (null === $template) {
+            throw new \RuntimeException("System prompt '{$key}' not found in database.");
+        }
 
+        $body = $template->getBody();
         $search = array_map(static fn (string $k) => '{{'.$k.'}}', array_keys($variables));
 
         return str_replace($search, array_values($variables), $body);
@@ -106,10 +46,4 @@ PROMPT,
             'json_coding' => ['schema', 'missingHint', 'specsText'],
         ];
     }
-
-    /** @return string */
-    public static function defaultFor(string $key): string
-    {
-        return self::DEFAULTS[$key] ?? '';
-    }
 }

src/Infrastructure/Http/Controller/Admin/PromptTemplateCrudController.php

@@ -6,13 +6,15 @@ namespace App\Infrastructure\Http\Controller\Admin;
 
 use App\Domain\AI\PromptTemplate;
 use App\Infrastructure\AI\PromptTemplateService;
-use Symfony\Component\Translation\TranslatableMessage;
+use EasyCorp\Bundle\EasyAdminBundle\Config\Action;
+use EasyCorp\Bundle\EasyAdminBundle\Config\Actions;
 use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;
 use EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController;
 use EasyCorp\Bundle\EasyAdminBundle\Field\DateTimeField;
 use EasyCorp\Bundle\EasyAdminBundle\Field\IdField;
 use EasyCorp\Bundle\EasyAdminBundle\Field\TextareaField;
 use EasyCorp\Bundle\EasyAdminBundle\Field\TextField;
+use Symfony\Component\Translation\TranslatableMessage;
 
 /** @extends AbstractCrudController<PromptTemplate> */
 final class PromptTemplateCrudController extends AbstractCrudController
@@ -30,17 +32,17 @@ final class PromptTemplateCrudController extends AbstractCrudController
             ->setDefaultSort(['key' => 'ASC']);
     }
 
-    public function createEntity(string $entityFqcn): PromptTemplate
+    public function configureActions(Actions $actions): Actions
     {
-        return new PromptTemplate('', '');
+        return $actions->disable(Action::NEW, Action::DELETE);
     }
 
     public function configureFields(string $pageName): iterable
     {
         yield IdField::new('id')->hideOnForm()->hideOnIndex();
         yield TextField::new('key', new TranslatableMessage('field.prompt_key', [], 'admin'))
-            ->setHelp(new TranslatableMessage('field.prompt_key_help', [], 'admin'))
-            ->setColumns(4);
+            ->setColumns(4)
+            ->setFormTypeOption('disabled', true);
         yield TextareaField::new('body', new TranslatableMessage('field.prompt_body', [], 'admin'))
             ->setHelp($this->buildVariableHelp())
             ->setNumOfRows(18)
@@ -64,7 +66,6 @@ final class PromptTemplateCrudController extends AbstractCrudController
             $lines[] = "<li><strong>{$key}</strong>: {$varList}</li>";
         }
         $lines[] = '</ul>';
-        $lines[] = 'If no DB entry exists for a key, the built-in default is used automatically.';
 
         return implode('', $lines);
     }