Add scenic selection and cooperation order flows aligned with Android.

Upgrade scenic picker with search, location sorting, permission apply/status, and blocking home dialog; add cooperation order module and order source picker improvements with unit tests.

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

suixinkanTests/ScenicDistanceCalculatorTests.swift

@@ -0,0 +1,28 @@
+//
+//  ScenicDistanceCalculatorTests.swift
+//  suixinkanTests
+//
+
+import XCTest
+@testable import suixinkan
+
+/// 景区距离计算测试。
+final class ScenicDistanceCalculatorTests: XCTestCase {
+
+    func testDistanceKilometersBetweenKnownPoints() {
+        // 北京天安门 ~ 故宫，约 0.9km
+        let km = ScenicDistanceCalculator.distanceKilometers(
+            fromLat: 39.9087,
+            fromLng: 116.3975,
+            toLat: 39.9163,
+            toLng: 116.3972
+        )
+        XCTAssertGreaterThan(km, 0.5)
+        XCTAssertLessThan(km, 1.5)
+    }
+
+    func testFormatDistanceKilometers() {
+        XCTAssertEqual(ScenicDistanceCalculator.formatDistanceKilometers(1.234), "1.23")
+        XCTAssertEqual(ScenicDistanceCalculator.formatDistanceKilometers(0), "0")
+    }
+}