fix:优化搜索逻辑

frontend/src/components/SearchBar.vue

@@ -83,10 +83,16 @@ watch(
       keyword.value = newKeyword;
       handleSearch();
     } else {
-      keyword.value = "";
+      keyword.value = resourcStore.keyword;
     }
   }
 );
+watch(
+  () => resourcStore.keyword,
+  (newKeyword) => {
+    keyword.value = newKeyword;
+  }
+);
 </script>
 
 <style lang="scss" scoped>