fix: 代码审查 P2 建议项修复（22 项体验优化）

EditorView (8 项):
- 时长警告图标区分：分享警告改用 square.and.arrow.up
- coverExtractionTask 竞态防护：新增 isViewActive 守卫
- sensoryFeedback 优化：缩放触觉仅在手势结束时触发
- iPad 右侧面板增加水平内边距
- 预设列表/兼容模式/AI 区域硬编码间距替换为 DesignTokens
- 诊断按钮 padding 替换为 DesignTokens
- generateButton 补充 accessibilityLabel

PresetManager + RecentWorksManager (5 项):
- iCloud 合并回写 + 防循环标志位
- iCloud 配额防护（>900KB 跳过写入）
- QuotaViolation/AccountChange 事件处理
- EditingPreset 自定义 Codable（decodeIfPresent + 默认值）
- RecentWork aspectRatio 枚举化
- 清理 saveToLocalOnly 死代码

ResultView + ProcessingView + HomeView (5 项):
- ResultView animateIn 改用 structured concurrency
- ProcessingView 阶段数提取为常量
- ProcessingView 脉冲动画去重
- HomeView 删除触觉升级为 .warning
- HomeView Cancel 按钮本地化

LivePhotoCore + AppState (4 项):
- coverImageURL 参数去重，内部从 exportParams 读取
- progress 回调钳位 min(pct, 1.0)
- CropRect 新增 clamped() 归一化校验
- AppState 初始化错误增加 os.Logger 日志

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Sources/LivePhotoCore/LivePhotoCore.swift

@@ -82,13 +82,23 @@ public struct CropRect: Codable, Sendable, Hashable {
     /// 全画幅（不裁剪）
     public static let full = CropRect()
 
+    /// 返回值域限制在 [0, 1] 范围内的新 CropRect，确保 x+width <= 1, y+height <= 1
+    public func clamped() -> CropRect {
+        let clampedX = min(max(x, 0), 1)
+        let clampedY = min(max(y, 0), 1)
+        let clampedW = min(max(width, 0), 1 - clampedX)
+        let clampedH = min(max(height, 0), 1 - clampedY)
+        return CropRect(x: clampedX, y: clampedY, width: clampedW, height: clampedH)
+    }
+
     /// 转换为像素坐标
     public func toPixelRect(videoSize: CGSize) -> CGRect {
-        CGRect(
-            x: x * videoSize.width,
-            y: y * videoSize.height,
-            width: width * videoSize.width,
-            height: height * videoSize.height
+        let safe = clamped()
+        return CGRect(
+            x: safe.x * videoSize.width,
+            y: safe.y * videoSize.height,
+            width: safe.width * videoSize.width,
+            height: safe.height * videoSize.height
         )
     }
 }
@@ -521,10 +531,10 @@ public actor LivePhotoBuilder {
     public func buildResources(
         workId: UUID = UUID(),
         sourceVideoURL: URL,
-        coverImageURL: URL? = nil,
         exportParams: ExportParams = ExportParams(),
         progress: (@Sendable (LivePhotoBuildProgress) -> Void)? = nil
     ) async throws -> LivePhotoBuildOutput {
+        let coverImageURL = exportParams.coverImageURL
         let assetIdentifier = UUID().uuidString
         let paths = try cacheManager.makeWorkPaths(workId: workId)
 
@@ -1070,7 +1080,7 @@ public actor LivePhotoBuilder {
                             if let sampleBuffer = videoReaderOutput.copyNextSampleBuffer() {
                                 currentFrameCount += 1
                                 let pct = Double(currentFrameCount) / Double(frameCount)
-                                progress(pct)
+                                progress(min(pct, 1.0))
                                 videoWriterInput.append(sampleBuffer)
                             } else {
                                 videoWriterInput.markAsFinished()
@@ -1192,14 +1202,12 @@ public actor LivePhotoWorkflow {
     public func buildSaveValidate(
         workId: UUID = UUID(),
         sourceVideoURL: URL,
-        coverImageURL: URL? = nil,
         exportParams: ExportParams = ExportParams(),
         progress: (@Sendable (LivePhotoBuildProgress) -> Void)? = nil
     ) async throws -> LivePhotoWorkflowResult {
         let output = try await builder.buildResources(
             workId: workId,
             sourceVideoURL: sourceVideoURL,
-            coverImageURL: coverImageURL,
             exportParams: exportParams,
             progress: progress
         )