feat: 调整微信风格明暗主题并完整展示详情图片

src/features/subject-identity/components/IdentityGallery.vue

@@ -64,6 +64,7 @@ function chooseAnchor() {
                 :src="selected.status === 'completed' ? selected.imageUrl : null"
                 :alt="`${subjectName} · ${identityViewLabels[selected.viewType]}`"
                 class="asset-image-preview mt-4"
+                object-fit="contain"
                 preview
                 :empty-text="selected.status === 'failed' ? '本次生成失败' : '等待后端图片结果'"
             />

src/features/subject-identity/identity.test.ts

@@ -45,7 +45,7 @@ function input(selector: string, value: string) {
 }
 
 describe('身份图与母版契约', () => {
-    it('大图和历史统一 cover，缩略图只切换记录，大图单独打开完整原图', async () => {
+    it('详情大图 contain 完整显示，历史仍为 cover，缩略图只切换记录', async () => {
         wrapper = mount(IdentityGallery, {
             attachTo: document.body,
             props: {
@@ -66,13 +66,14 @@ describe('身份图与母版契约', () => {
         })
         const images = wrapper.findAllComponents(NImage)
         expect(images).toHaveLength(3)
-        expect(images.every(image => image.props('objectFit') === 'cover')).toBe(true)
+        expect(images.map(image => image.props('objectFit'))).toEqual(['contain', 'cover', 'cover'])
         expect(images.map(image => image.props('previewDisabled'))).toEqual([false, true, true])
         await wrapper.get('[aria-label="查看身份图片 front"] img').trigger('click')
         await flushPromises()
         expect(wrapper.get('[aria-label="查看身份图片 front"]').attributes('aria-pressed')).toBe('true')
         expect(document.querySelector('.n-image-preview-container')).toBeNull()
         const main = wrapper.get('.asset-image-preview img')
+        expect((main.element as HTMLImageElement).style.objectFit).toBe('contain')
         expect(main.attributes('src')).toContain('/storage/front.png')
         await main.trigger('click')
         await flushPromises()