adds ability to star chats

ios/Packages/Sybil/Tests/SybilTests/SybilTests.swift

@@ -10,6 +10,8 @@ private struct MockClientCallSnapshot: Sendable {
     var createChat = 0
     var getChat = 0
     var updateChatTitle = 0
+    var updateChatStar = 0
+    var updateSearchStar = 0
     var getSearch = 0
     var getActiveRuns = 0
     var runCompletionStream = 0
@@ -34,6 +36,8 @@ private actor MockSybilClient: SybilAPIClienting {
     private let searchDetails: [String: SearchDetail]
     private let createChatResponse: ChatSummary?
     private let updateChatTitleResponses: [String: ChatSummary]
+    private let updateChatStarResponses: [String: ChatSummary]
+    private let updateSearchStarResponses: [String: SearchSummary]
     private let activeRunsResponse: ActiveRunsResponse
 
     private var snapshot = MockClientCallSnapshot()
@@ -60,6 +64,8 @@ private actor MockSybilClient: SybilAPIClienting {
         searchDetails: [String: SearchDetail] = [:],
         createChatResponse: ChatSummary? = nil,
         updateChatTitleResponses: [String: ChatSummary] = [:],
+        updateChatStarResponses: [String: ChatSummary] = [:],
+        updateSearchStarResponses: [String: SearchSummary] = [:],
         activeRunsResponse: ActiveRunsResponse = ActiveRunsResponse(),
         workspaceItemsResponse: [WorkspaceItem]? = nil
     ) {
@@ -70,6 +76,8 @@ private actor MockSybilClient: SybilAPIClienting {
         self.searchDetails = searchDetails
         self.createChatResponse = createChatResponse
         self.updateChatTitleResponses = updateChatTitleResponses
+        self.updateChatStarResponses = updateChatStarResponses
+        self.updateSearchStarResponses = updateSearchStarResponses
         self.activeRunsResponse = activeRunsResponse
     }
 
@@ -194,6 +202,14 @@ private actor MockSybilClient: SybilAPIClienting {
         return summary
     }
 
+    func updateChatStar(chatID: String, starred: Bool) async throws -> ChatSummary {
+        snapshot.updateChatStar += 1
+        guard let summary = updateChatStarResponses[chatID] else {
+            throw UnexpectedClientCall()
+        }
+        return summary
+    }
+
     func deleteChat(chatID: String) async throws {
         throw UnexpectedClientCall()
     }
@@ -229,6 +245,14 @@ private actor MockSybilClient: SybilAPIClienting {
         throw UnexpectedClientCall()
     }
 
+    func updateSearchStar(searchID: String, starred: Bool) async throws -> SearchSummary {
+        snapshot.updateSearchStar += 1
+        guard let summary = updateSearchStarResponses[searchID] else {
+            throw UnexpectedClientCall()
+        }
+        return summary
+    }
+
     func deleteSearch(searchID: String) async throws {
         throw UnexpectedClientCall()
     }
@@ -509,6 +533,41 @@ private func makeSearchDetail(id: String, date: Date, answer: String) -> SearchD
     #expect(viewModel.errorMessage == nil)
 }
 
+@MainActor
+@Test func starringItemsUpdatesSidebarState() async throws {
+    let date = Date(timeIntervalSince1970: 1_700_000_175)
+    let chat = makeChatSummary(id: "chat-star", date: date)
+    let search = makeSearchSummary(id: "search-star", date: date)
+    var starredChat = chat
+    starredChat.starred = true
+    starredChat.starredAt = date.addingTimeInterval(5)
+    var starredSearch = search
+    starredSearch.starred = true
+    starredSearch.starredAt = date.addingTimeInterval(10)
+
+    let client = MockSybilClient(
+        chatsResponse: [chat],
+        searchesResponse: [search],
+        updateChatStarResponses: ["chat-star": starredChat],
+        updateSearchStarResponses: ["search-star": starredSearch]
+    )
+    let viewModel = SybilViewModel(settings: testSettings(named: #function)) { _ in client }
+    viewModel.isAuthenticated = true
+    viewModel.isCheckingSession = false
+    viewModel.chats = [chat]
+    viewModel.searches = [search]
+    viewModel.workspaceItems = [WorkspaceItem(chat: chat), WorkspaceItem(search: search)]
+
+    await viewModel.setItemStarred(.chat("chat-star"), starred: true)
+    await viewModel.setItemStarred(.search("search-star"), starred: true)
+
+    let snapshot = await client.currentSnapshot()
+    #expect(snapshot.updateChatStar == 1)
+    #expect(snapshot.updateSearchStar == 1)
+    #expect(viewModel.sidebarItems.first(where: { $0.selection == .chat("chat-star") })?.starred == true)
+    #expect(viewModel.sidebarItems.first(where: { $0.selection == .search("search-star") })?.starred == true)
+}
+
 @MainActor
 @Test func foregroundSearchRefreshReloadsSelectedSearch() async throws {
     let date = Date(timeIntervalSince1970: 1_700_000_200)