feat: restyle emoji picker with sectioned tiles

Tests/ConjureKitTests/EmojiPickerTests.swift

@@ -71,8 +71,13 @@ import Testing
     func expectVisible() throws {
         picker.copySelection()
         let index = try #require(ordered.firstIndex { $0.value == pasteboard.string(forType: .string) })
-        let path = favorites && index >= favored.count
-            ? IndexPath(item: index - favored.count, section: 1) : IndexPath(item: index, section: 0)
+        var item = index
+        var section = 0
+        while item >= grid.numberOfItems(inSection: section) {
+            item -= grid.numberOfItems(inSection: section)
+            section += 1
+        }
+        let path = IndexPath(item: item, section: section)
         let frame = try #require(grid.collectionViewLayout?.layoutAttributesForItem(at: path)?.frame)
         try #require(scroll.documentVisibleRect.contains(frame))
     }
@@ -239,7 +244,7 @@ import Testing
     #expect(table.numberOfRows == 1)
 }
 
-@Test @MainActor func emojiFavoritesPersistAndNavigationCrossesTheSpacingBreak() throws {
+@Test @MainActor func emojiFavoritesPersistAndNavigationCrossesSections() throws {
     _ = NSApplication.shared
     let suite = "ConjureEmojiFavorites.\(UUID().uuidString)"
     let defaults = UserDefaults(suiteName: suite)!
@@ -254,9 +259,6 @@ import Testing
     query = ""
     picker.inputChanged()
     picker.view.layoutSubtreeIfNeeded()
-    let grid = try #require(picker.view.subviews.compactMap { $0 as? NSScrollView }.first?.documentView as? NSCollectionView)
-    #expect(grid.numberOfSections == 2)
-    #expect(grid.numberOfItems(inSection: 0) == 1)
     #expect(picker.handleControlKey("j"))
     picker.copySelection()
     #expect(pasteboard.string(forType: .string) == EmojiCatalog.all[0].value)
@@ -271,7 +273,6 @@ import Testing
     #expect(picker.handleControlKey("k"))
     picker.toggleFavorite()
     #expect(defaults.stringArray(forKey: "favoriteEmoji") == [])
-    #expect(grid.numberOfSections == 1)
     query = "👩‍💻"
     picker.inputChanged()
     picker.toggleFavorite()