feat: 使用 dayjs 替换时间处理逻辑，优化日期时间转换功能，删除不再使用的时间工具函数

package-lock.json

@@ -17,6 +17,7 @@
         "@testing-library/react": "^16.3.1",
         "@testing-library/user-event": "^13.5.0",
         "date-fns": "^4.1.0",
+        "dayjs": "^1.11.19",
         "dexie": "^4.2.1",
         "dexie-react-hooks": "^4.2.0",
         "react": "^19.2.3",
@@ -3744,6 +3745,12 @@
         "url": "https://github.com/sponsors/kossnocorp"
       }
     },
+    "node_modules/dayjs": {
+      "version": "1.11.19",
+      "resolved": "https://registry.npmmirror.com/dayjs/-/dayjs-1.11.19.tgz",
+      "integrity": "sha512-t5EcLVS6QPBNqM2z8fakk/NKel+Xzshgt8FFKAn+qwlD1pzZWxh0nVCrvFK7ZDb6XucZeF9z8C7CBWTRIVApAw==",
+      "license": "MIT"
+    },
     "node_modules/debounce": {
       "version": "1.2.1",
       "resolved": "https://registry.npmmirror.com/debounce/-/debounce-1.2.1.tgz",