拆分宣传页视图并扩充 Mock 数据，合作订单支持获客员备注名并修复线索图片网格尺寸。

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

suixinkan/Features/ScenicPromotion/Views/ScenicPromotionSettingsHeaderView.swift

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+//
+//  ScenicPromotionSettingsHeaderView.swift
+//  suixinkan
+//
+//  Created by Codex on 2026/7/2.
+//
+
+import SwiftUI
+
+/// 设置页顶部说明模块。
+struct ScenicPromotionSettingsHeaderView: View {
+    var body: some View {
+        HStack(spacing: 14) {
+            Image(systemName: "slider.horizontal.3")
+                .font(.system(size: 24, weight: .bold))
+                .foregroundStyle(.white)
+                .frame(width: 52, height: 52)
+                .background(.white.opacity(0.18), in: RoundedRectangle(cornerRadius: 16))
+
+            VStack(alignment: .leading, spacing: 6) {
+                Text("宣传页内容设置")
+                    .font(.system(size: 20, weight: .heavy))
+                    .foregroundStyle(.white)
+                Text("配置排队绑定、素材所属点位和本地演示素材")
+                    .font(.system(size: 13, weight: .medium))
+                    .foregroundStyle(.white.opacity(0.86))
+                    .lineLimit(2)
+            }
+
+            Spacer(minLength: 0)
+        }
+        .padding(18)
+        .frame(maxWidth: .infinity, alignment: .leading)
+        .background(
+            LinearGradient(
+                colors: [Color(hex: 0x087BFF), Color(hex: 0x0C56D8)],
+                startPoint: .topLeading,
+                endPoint: .bottomTrailing
+            ),
+            in: RoundedRectangle(cornerRadius: 18)
+        )
+    }
+}
+
+#if DEBUG
+#Preview("设置页头部") {
+    ScenicPromotionSettingsHeaderView()
+        .padding()
+        .background(AppDesign.background)
+}
+#endif