feat: Enhance Support Reply Service with tone instructions and article details

- Added tone instruction retrieval to SupportReplyService.
- Improved user feedback when no relevant article is found.
- Included article URL and tone instruction in LLM prompt.
- Updated response format to include source information.
- Enhanced article management UI with search functionality and editing capabilities.
- Introduced a new API endpoint for nearest articles based on vector search.
- Added confidence badge component to display article confidence levels.
- Implemented tests for article searching, editing, and nearest article API.
- Removed obsolete .htaccess file.

app/Services/KnowledgeGapService.php

@@ -8,6 +8,8 @@ use Illuminate\Support\Str;
 
 class KnowledgeGapService
 {
+    public const CONFIDENCE_THRESHOLD = 0.45;
+
     public function __construct(
         private readonly LlmClientInterface $llmClient,
         private readonly AppSettingsService $settings,
@@ -16,7 +18,7 @@ class KnowledgeGapService
     public function shouldCreateDraft(Ticket $ticket, array $result): bool
     {
         $confidence = (float) ($result['confidence'] ?? 0);
-        if ($confidence < 0.45) {
+        if ($confidence < self::CONFIDENCE_THRESHOLD) {
             return true;
         }
 
@@ -41,6 +43,7 @@ class KnowledgeGapService
         $prompt = $basePrompt."\n\n".
             "Klantvraag:\n{$question}\n\n".
             "Originele taal: {$language}. Schrijf titel en inhoud in deze taal.\n\n".
+            'Aanspreekvorm: '.$this->settings->toneInstruction()."\n\n".
             "Huidige kandidaten (mogelijk onvoldoende):\n{$topCandidates}\n\n".
             'Content moet praktisch zijn met duidelijke stappen.';