fix(aihr): polish model fallback wording

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

@@ -76,7 +76,7 @@ public class AihrModelSeedService {
 
     private static List<ConfigResponse> seedConfigs() {
         return List.of(
-            new ConfigResponse(-1L, "chat", DEFAULT_MODEL, DEFAULT_PROVIDER, "Demo 对话与 RAG 生成模型", null, "Y", null, true, false, false),
+            new ConfigResponse(-1L, "chat", DEFAULT_MODEL, DEFAULT_PROVIDER, "通用对话与 RAG 生成模型", null, "Y", null, true, false, false),
             new ConfigResponse(-2L, "vector", "embedding-3", "zhipu", "后续用于知识片段向量化", 2048, "N", null, false, false, false),
             new ConfigResponse(-3L, "rerank", "rerank", "zhipu", "后续用于召回片段重排序", null, "N", null, false, false, false),
             new ConfigResponse(-4L, "vector", "BAAI/bge-m3", "siliconflow", "硅基流动 bge-m3，用于知识片段向量化", 1024, "N", null, false, false, false),
@@ -339,7 +339,7 @@ public class AihrModelSeedService {
                 rs.getString("category"),
                 rs.getString("model_name"),
                 rs.getString("provider_code"),
-                rs.getString("model_describe"),
+                normalizeModelDescribe(rs.getString("model_describe")),
                 rs.getObject("model_dimension", Integer.class),
                 rs.getString("model_show"),
                 rs.getString("api_host"),
@@ -496,6 +496,11 @@ public class AihrModelSeedService {
         return value == null ? null : value.trim();
     }
 
+    private static String normalizeModelDescribe(String value) {
+        String cleaned = clean(value);
+        return cleaned == null ? null : cleaned.replace("用于 Demo 对话", "用于通用对话").replace("Demo 对话", "通用对话");
+    }
+
     private static String emptyToNull(String value) {
         String cleaned = clean(value);
         return isBlank(cleaned) ? null : cleaned;