Fix add button. Fix hotkeys in settings. Add Workspace hotkeys

Downterm/CommandNotchTests/WorkspaceRegistryTests.swift

@@ -74,6 +74,30 @@ final class WorkspaceRegistryTests: XCTestCase {
         XCTAssertEqual(store.savedSummaries.map(\.name), ["Main"])
     }
 
+    func testUpdateWorkspaceHotkeyPersistsAndUpdatesSummary() {
+        let store = InMemoryWorkspaceStore()
+        let registry = makeRegistry(store: store)
+        let docsID = registry.createWorkspace(named: "Docs")
+        let hotkey = HotkeyBinding.cmdShiftDigit(4)
+
+        registry.updateWorkspaceHotkey(id: docsID, to: hotkey)
+
+        XCTAssertEqual(registry.summary(for: docsID)?.hotkey, hotkey)
+        XCTAssertEqual(store.savedSummaries.last?.hotkey, hotkey)
+    }
+
+    func testNextAndPreviousWorkspaceWrapAroundRegistryOrder() {
+        let registry = makeRegistry()
+        let mainID = registry.defaultWorkspaceID
+        let docsID = registry.createWorkspace(named: "Docs")
+        let reviewID = registry.createWorkspace(named: "Review")
+
+        XCTAssertEqual(registry.nextWorkspaceID(after: mainID), docsID)
+        XCTAssertEqual(registry.nextWorkspaceID(after: reviewID), mainID)
+        XCTAssertEqual(registry.previousWorkspaceID(before: mainID), reviewID)
+        XCTAssertEqual(registry.previousWorkspaceID(before: docsID), mainID)
+    }
+
     private func makeRegistry(
         initialWorkspaces: [WorkspaceSummary]? = [],
         store: (any WorkspaceStoreType)? = nil