style(fg-navbar): 格式化组件代码以提高可读性

重构 fg-navbar.vue 文件的代码格式，主要修改包括：
1. 将 withDefaults 和 defineProps 的代码结构重新排版
2. 统一使用 2 空格缩进
3. 将模板中的属性分行排列
这些改动不影响组件功能，仅提升代码可读性和维护性

src/components/fg-navbar/fg-navbar.vue

@@ -1,16 +1,18 @@
 <script lang="ts" setup>
-withDefaults(defineProps<{
-  leftText?: string;
-  rightText?: string;
-  leftArrow?: boolean;
-  bordered?: boolean;
-  fixed?: boolean;
-  placeholder?: boolean;
-  zIndex?: number;
-  safeAreaInsetTop?: boolean;
-  leftDisabled?: boolean;
-  rightDisabled?: boolean;
-}>(), {
+withDefaults(
+  defineProps<{
+    leftText?: string
+    rightText?: string
+    leftArrow?: boolean
+    bordered?: boolean
+    fixed?: boolean
+    placeholder?: boolean
+    zIndex?: number
+    safeAreaInsetTop?: boolean
+    leftDisabled?: boolean
+    rightDisabled?: boolean
+  }>(),
+  {
     leftText: '返回',
     rightText: '',
     leftArrow: true,
@@ -21,24 +23,32 @@ withDefaults(defineProps<{
     safeAreaInsetTop: true,
     leftDisabled: false,
     rightDisabled: false,
-});
+  },
+)
 
 function handleClickLeft() {
   uni.navigateBack({
     fail() {
       uni.reLaunch({
         url: '/pages/index/index',
-      });
+      })
     },
-  });
+  })
 }
 </script>
 
 <template>
   <wd-navbar
-    :left-text="leftText" :right-text="rightText" :left-arrow="leftArrow"
-    :bordered="bordered" :fixed="fixed" :placeholder="placeholder" :z-index="zIndex"
-    :safe-area-inset-top="safeAreaInsetTop" :left-disabled="leftDisabled" :right-disabled="rightDisabled"
+    :left-text="leftText"
+    :right-text="rightText"
+    :left-arrow="leftArrow"
+    :bordered="bordered"
+    :fixed="fixed"
+    :placeholder="placeholder"
+    :z-index="zIndex"
+    :safe-area-inset-top="safeAreaInsetTop"
+    :left-disabled="leftDisabled"
+    :right-disabled="rightDisabled"
     @click-left="handleClickLeft"
   >
     <template #title>