fix(knowledge): normalize no-evidence model replies

backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrSopSeedService.java

@@ -3599,8 +3599,11 @@ public class AihrSopSeedService {
         return truncate(firstNonBlank(cleaned, "请参考下方命中片段。"), 180);
     }
 
-    private static boolean isNoEvidenceAnswer(String answer) {
+    static boolean isNoEvidenceAnswer(String answer) {
-        return NO_CLEAR_SOP_EVIDENCE.equals(Optional.ofNullable(answer).orElse("").trim());
+        String normalized = Optional.ofNullable(answer).orElse("")
+            .replaceAll("\\s+", "")
+            .trim();
+        return NO_CLEAR_SOP_EVIDENCE.replaceAll("\\s+", "").equals(normalized);
     }
 
     private static SearchResponse noEvidenceResponse(String queryText, String category) {

backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrSopSeedServiceTest.java

@@ -30,6 +30,15 @@ import static org.mockito.Mockito.verify;
 
 public class AihrSopSeedServiceTest {
 
+    @Test
+    @Tag("dev")
+    public void noEvidenceAnswerIgnoresModelWhitespaceDifferences() {
+        assertTrue(AihrSopSeedService.isNoEvidenceAnswer("未在已入库 SOP 中找到明确依据"));
+        assertTrue(AihrSopSeedService.isNoEvidenceAnswer("未在已入库SOP中找到明确依据"));
+        assertTrue(AihrSopSeedService.isNoEvidenceAnswer(" 未在已入库\tSOP 中找到明确依据 "));
+        assertFalse(AihrSopSeedService.isNoEvidenceAnswer("已找到正式制度依据"));
+    }
+
     @Test
     @Tag("dev")
     public void rawHitResponseKeepsSnippetsWhenDigestUnavailable() {