Refactor home to single collection view and add all-functions customization.

Replace scroll/stack layout with one UICollectionView, fix grid column math and Diffable item IDs so location report and quick actions render, and add the customizable all-functions page with persistence and tests.

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

suixinkanTests/HomeCollectionModelsTests.swift

@@ -0,0 +1,53 @@
+//
+//  HomeCollectionModelsTests.swift
+//  suixinkanTests
+//
+
+import XCTest
+@testable import suixinkan
+
+/// 首页 Collection snapshot 测试。
+final class HomeCollectionModelsTests: XCTestCase {
+
+    func testMakeSnapshotIncludesDistinctWorkBlockItems() {
+        let snapshot = HomeCollectionLayoutBuilder.makeSnapshot(
+            showWorkBlock: true,
+            showStore: false,
+            storeItem: nil,
+            commonMenus: []
+        )
+
+        XCTAssertEqual(snapshot.numberOfSections, 4)
+        XCTAssertEqual(snapshot.numberOfItems(inSection: .workStatus), 1)
+        XCTAssertEqual(snapshot.numberOfItems(inSection: .locationReport), 1)
+        XCTAssertEqual(snapshot.numberOfItems(inSection: .quickActions), 1)
+        XCTAssertEqual(snapshot.itemIdentifiers(inSection: .workStatus), [.workStatus])
+        XCTAssertEqual(snapshot.itemIdentifiers(inSection: .locationReport), [.locationReport])
+        XCTAssertEqual(snapshot.itemIdentifiers(inSection: .quickActions), [.quickActions])
+    }
+
+    func testMakeSnapshotOmitsWorkBlockForMinimalTopRole() {
+        let snapshot = HomeCollectionLayoutBuilder.makeSnapshot(
+            showWorkBlock: false,
+            showStore: false,
+            storeItem: nil,
+            commonMenus: []
+        )
+
+        XCTAssertEqual(snapshot.sectionIdentifiers, [.commonApps])
+        XCTAssertEqual(snapshot.itemIdentifiers(inSection: .commonApps).count, 1)
+    }
+
+    func testMakeSnapshotIncludesStoreSectionWhenAvailable() {
+        let store = StoreItem(id: 1, name: "测试门店", address: "测试地址")
+        let snapshot = HomeCollectionLayoutBuilder.makeSnapshot(
+            showWorkBlock: true,
+            showStore: true,
+            storeItem: store,
+            commonMenus: []
+        )
+
+        XCTAssertTrue(snapshot.sectionIdentifiers.contains(.store))
+        XCTAssertEqual(snapshot.itemIdentifiers(inSection: .store), [.store])
+    }
+}