fix: restore kb retrieve fallback

server/app/common/service/ai/KbService.php

@@ -23,6 +23,28 @@ class KbService
 {
     public const COLLECTION_GLOBAL = 'global';
 
+    private const QUERY_TERM_ALIASES = [
+        '旧澳六合' => ['旧澳六合', '老澳门六合彩'],
+        '新澳六合' => ['新澳六合', '新澳门六合彩'],
+    ];
+
+    private const QUERY_COMMON_TERMS = [
+        '分析线索',
+        '走势分析',
+        '开奖记录',
+        '开奖结果',
+        '冷热号',
+        '波色',
+        '生肖',
+        '特码',
+        '号码',
+        '彩票',
+        '比赛',
+        '新闻',
+        '马刺',
+        'NBA',
+    ];
+
     public static function upsertDocument(string $domain, string $subtype, int $sourceId): array
     {
         $transactionStarted = false;
@@ -320,11 +342,18 @@ class KbService
         if (empty($candidates)) {
             $keywordParts = self::splitQueryTerms($queryText);
             $fallback = clone $query;
-            foreach (array_slice($keywordParts, 0, 3) as $term) {
-                $fallback->where(function ($subQuery) use ($term) {
-                    $subQuery->whereLike('c.chunk_text', '%' . $term . '%')
-                        ->whereOrLike('d.title', '%' . $term . '%')
-                        ->whereOrLike('d.keywords', '%' . $term . '%');
+            if (!empty($keywordParts)) {
+                $fallback->where(function ($keywordQuery) use ($keywordParts) {
+                    foreach (array_slice($keywordParts, 0, 8) as $index => $term) {
+                        $like = '%' . $term . '%';
+                        $method = $index === 0 ? 'where' : 'whereOr';
+                        $keywordQuery->{$method}(function ($subQuery) use ($like) {
+                            $subQuery->whereLike('c.chunk_text', $like)
+                                ->whereOr('d.title', 'like', $like)
+                                ->whereOr('d.summary', 'like', $like)
+                                ->whereOr('d.keywords', 'like', $like);
+                        });
+                    }
                 });
             }
             $candidates = $fallback->order('d.source_updated_at', 'desc')->limit($limit)->select()->toArray();
@@ -800,9 +829,27 @@ class KbService
             return [];
         }
 
-        $terms = preg_split('/[\s,，。！？；、:：\/\\\\]+/u', $queryText) ?: [];
-        $terms = array_values(array_filter(array_map('trim', $terms), static fn(string $term) => mb_strlen($term) >= 2));
-        return array_unique($terms);
+        $terms = [];
+        foreach (self::QUERY_TERM_ALIASES as $trigger => $aliases) {
+            if (mb_strpos($queryText, $trigger) !== false) {
+                array_push($terms, ...$aliases);
+            }
+        }
+
+        foreach (self::QUERY_COMMON_TERMS as $term) {
+            if (mb_strpos($queryText, $term) !== false) {
+                $terms[] = $term;
+            }
+        }
+
+        $parts = preg_split('/[\s,，。！？；、:：\/\\\\]+/u', $queryText) ?: [];
+        array_push($terms, ...$parts);
+
+        $terms = array_values(array_filter(array_map('trim', $terms), static function (string $term) {
+            return mb_strlen($term) >= 2;
+        }));
+
+        return array_values(array_unique($terms));
     }
 
     private static function normalizeHtmlText(string $html): string