style: polish UI and improve UX

messages/zh/assetHub.json

@@ -22,6 +22,7 @@
     "downloadSuccess": "下载完成",
     "downloadFailed": "下载失败",
     "downloadEmpty": "当前没有可下载的图片资产",
+    "filteredEmptyHint": "点击新建资产添加资产",
     "newFolder": "新建文件夹",
     "editFolder": "编辑文件夹",
     "deleteFolder": "删除文件夹",

messages/zh/home.json

@@ -1,5 +1,5 @@
 {
-  "title": "快速开始",
+  "title": "从灵感到银幕",
   "subtitle": "描述你想要创作的故事，AI 为你智能生成影视短剧",
   "inputPlaceholder": "输入你的故事创意、小说片段或剧本大纲...",
   "startCreation": "开始创作",

messages/zh/novel-promotion.json

@@ -173,4 +173,4 @@
     "confirm": "继续并清空",
     "cancel": "取消"
   }
-}
+}