feat: 优化 AI 修图模板选择页面

suixinkanTests/TravelAlbumAIRetouchTemplateViewModelTests.swift

@@ -25,7 +25,7 @@ final class TravelAlbumAIRetouchTemplateViewModelTests: XCTestCase {
         XCTAssertTrue(viewModel.shouldShowInitialTips)
         XCTAssertEqual(
             viewModel.initialTipsText,
-            "每张照片生成精修结果，氛围感可选；本次可免费生成 1 张封面"
+            "Tips：氛围感修图为选填，可横向选择一种样式；选中后每张照片会额外生成1个独立结果，第一张照片仍另生成封面。"
         )
         XCTAssertEqual(viewModel.visibleCategories, [.refined, .atmosphere, .cover])
         XCTAssertEqual(viewModel.selectedRefinedTemplateId, 11)

suixinkanTests/TravelAlbumDetailViewControllerTests.swift

@@ -572,8 +572,13 @@ final class TravelAlbumDetailViewControllerTests: XCTestCase {
         let previewButton = cell.findSubview {
             $0.accessibilityIdentifier == "travelAlbum.aiRetouchTemplatePreviewButton"
         } as? UIButton
+        let previewImageView = cell.findSubview {
+            $0.accessibilityIdentifier == "travelAlbum.aiRetouchTemplateImage"
+        } as? UIImageView
         previewButton?.sendActions(for: .touchUpInside)
 
+        XCTAssertNotNil(UIImage(named: "ai_retouch_template_placeholder"))
+        XCTAssertNotNil(previewImageView?.image)
         XCTAssertEqual(cell.contentView.layer.borderWidth, 2)
         XCTAssertTrue(cell.accessibilityTraits.contains(.selected))
         XCTAssertEqual(cell.accessibilityValue, "已选择")