feat: 删除 知识库-终端 关联, 简化 prompt 配置

app/Services/KnowledgeContextService.php

@@ -2,8 +2,8 @@
 
 namespace App\Services;
 
-use App\Models\Terminal;
 use App\Models\Document;
+use App\Models\KnowledgeBase;
 use Illuminate\Support\Facades\Log;
 
 class KnowledgeContextService
@@ -12,15 +12,14 @@ class KnowledgeContextService
     private const TOP_K = 5;
 
     /**
-     * 搜索终端关联知识库中的文档
+     * 搜索所有知识库中的文档
      *
-     * @param Terminal $terminal
      * @param string $query
      * @return array{context: string, sources: array}
      */
-    public function search(Terminal $terminal, string $query): array
+    public function search(string $query): array
     {
-        $knowledgeBaseIds = $terminal->knowledgeBases->pluck('id')->toArray();
+        $knowledgeBaseIds = KnowledgeBase::where('status', 'active')->pluck('id')->toArray();
 
         if (empty($knowledgeBaseIds)) {
             return [
@@ -30,11 +29,18 @@ class KnowledgeContextService
         }
 
         try {
-            // 使用 Scout/Meilisearch 原生过滤（与 DocumentSearchService 一致）
-            $documents = Document::search($query)
-                ->whereIn('knowledge_base_id', $knowledgeBaseIds)
-                ->take(self::TOP_K)
-                ->get();
+            // 使用 Scout/Meilisearch 搜索并获取排名分数
+            $rawResults = Document::search($query, function ($meilisearch, $query, $options) use ($knowledgeBaseIds) {
+                $options['showRankingScore'] = true;
+                $filter = collect($knowledgeBaseIds)
+                    ->map(fn($id) => "knowledge_base_id = {$id}")
+                    ->implode(' OR ');
+                $options['filter'] = $filter;
+                $options['limit'] = self::TOP_K;
+                return $meilisearch->search($query, $options);
+            })->raw();
+
+            $hits = $rawResults['hits'] ?? [];
         } catch (\Exception $e) {
             Log::warning('Knowledge search failed', [
                 'query' => $query,
@@ -47,17 +53,29 @@ class KnowledgeContextService
             ];
         }
 
-        if ($documents->isEmpty()) {
+        if (empty($hits)) {
             return [
                 'context' => '',
                 'sources' => [],
             ];
         }
 
+        // 取出文档 ID 并加载 Eloquent 模型
+        $hitIds = collect($hits)->pluck('id')->toArray();
+        $documents = Document::whereIn('id', $hitIds)->get()->keyBy('id');
+
+        // 构建排名分数映射
+        $rankingScores = collect($hits)->pluck('_rankingScore', 'id');
+
         $context = '';
         $sources = [];
 
-        foreach ($documents as $document) {
+        foreach ($hits as $hit) {
+            $document = $documents->get($hit['id']);
+            if (!$document) {
+                continue;
+            }
+
             $snippet = $this->extractSnippet($document);
 
             if (mb_strlen($context) + mb_strlen($snippet) > self::MAX_CONTEXT_LENGTH) {
@@ -66,9 +84,9 @@ class KnowledgeContextService
 
             $context .= $snippet . "\n\n";
             $sources[] = [
-                'id' => $document->id,
                 'title' => $document->title,
-                'knowledge_base' => $document->knowledgeBase?->name,
+                'id' => 'kb-doc-' . str_pad($document->id, 3, '0', STR_PAD_LEFT),
+                'relevance' => round($rankingScores->get($document->id, 0), 2),
             ];
         }