first add files

ProjectLiaisonForm/pages/navbar/img/index.js

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+import themeChangeBehavior from 'tdesign-miniprogram/mixins/theme-change';
+
+Component({
+  behaviors: [themeChangeBehavior],
+});

ProjectLiaisonForm/pages/navbar/img/index.json

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+{
+  "component": true,
+  "styleIsolation": "apply-shared",
+  "usingComponents": {
+    "t-navbar": "tdesign-miniprogram/navbar/navbar",
+    "t-image": "tdesign-miniprogram/image/image"
+  }
+}

ProjectLiaisonForm/pages/navbar/img/index.wxml

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+<t-navbar t-class-placeholder="t-navbar-placeholder" t-class-content="t-navbar-content">
+  <view slot="left">
+    <t-image
+      t-class="custom-image"
+      src="{{theme === 'dark' ? 'https://tdesign.gtimg.com/mobile/demos/image-dark.png' : 'https://tdesign.gtimg.com/mobile/demos/logo-light.png'}}"
+      aria-label="导航栏图片"
+    />
+  </view>
+</t-navbar>

ProjectLiaisonForm/pages/navbar/img/index.wxss

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+.custom-image {
+  height: 24px;
+  width: 87px;
+}