新增项目、排期与邀请模块，并接入首页路由

将项目管理、排期管理与摄影师邀请流程从占位页迁移为完整实现，包含项目图片 OSS 上传与共享业务模型。

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkanTests/TaskViewModelTests.swift

@@ -300,6 +300,9 @@ private final class TaskMockUploadService: OSSUploadServing {
         return taskUploadURLs.isEmpty ? "https://cdn.example.com/task/default.jpg" : taskUploadURLs.removeFirst()
     }
 
+    /// 模拟上传项目图片。
+    func uploadProjectImage(data: Data, fileName: String, scenicId: Int, onProgress: @escaping (Int) -> Void) async throws -> String { "" }
+
     /// 模拟上传头像。
     func uploadUserAvatar(data: Data, fileName: String, scenicId: Int, onProgress: @escaping (Int) -> Void) async throws -> String { "" }