feat(ios): align chat library memory and tasks with web

ios/Tests/ChatParityTests.swift

@@ -0,0 +1,207 @@
+import XCTest
+@testable import Voice
+
+private final class ParityChatAPI: ChatTransport {
+    struct Request { let path: String; let method: String; let body: [String: Any]?; let query: [URLQueryItem] }
+    var requests: [Request] = []
+    var handler: ((Request) async throws -> Data?)?
+    private let fallback = OfflineChatAPI()
+    func request(_ path: String, method: String, body: [String: Any]?, query: [URLQueryItem]) async throws -> Data {
+        let request = Request(path: path, method: method, body: body, query: query)
+        requests.append(request)
+        if let data = try await handler?(request) { return data }
+        return try await fallback.request(path, method: method, body: body, query: query)
+    }
+    func events(run: String, after: Int, receive: @escaping @MainActor (ChatEvent) throws -> Void) async throws {}
+    func cancel() {}
+}
+
+@MainActor
+final class ChatParityTests: XCTestCase {
+    private func conversation(_ id: String, workspace: String? = nil, revision: Int = 1) -> HopeConversation {
+        HopeConversation(id: id, title: id, workspaceId: workspace, pinned: false, pinRank: 0, archived: false, temporary: false, revision: revision, createdAt: 1, updatedAt: 1)
+    }
+    private func encoded(_ value: [String: Any]) throws -> Data { try JSONSerialization.data(withJSONObject: value) }
+    private func projection(_ conversation: HopeConversation) throws -> Any {
+        let encoder = JSONEncoder(); encoder.keyEncodingStrategy = .convertToSnakeCase
+        return try JSONSerialization.jsonObject(with: encoder.encode(conversation))
+    }
+    private func attachment(_ id: String, mime: String = "text/plain", status: String = "ready") -> ChatAttachment {
+        ChatAttachment(id: id, filename: "notes.txt", mime: mime, size: 12, extractionStatus: status, createdAt: 1)
+    }
+    func testWorkspaceFilterPrecedesPagingAndScopeChangeDropsCursor() async throws {
+        let api = ParityChatAPI(); let store = ChatStore(api: api)
+        api.handler = { request in
+            guard request.path == "api/conversations" else { return nil }
+            return Data("{\"conversations\":[],\"next_cursor\":\"page-two\"}".utf8)
+        }
+        await store.load(query: "search", archived: true, workspace: "writing")
+        await store.load(query: "search", archived: true, workspace: "writing", more: true)
+        await store.load(query: "search", archived: true, workspace: "different", more: true)
+        let lists = api.requests.filter { $0.path == "api/conversations" }
+        XCTAssertEqual(lists.count, 3)
+        XCTAssertEqual(lists[0].query.first { $0.name == "workspace_id" }?.value, "writing")
+        XCTAssertEqual(lists[1].query.first { $0.name == "cursor" }?.value, "page-two")
+        XCTAssertNil(lists[2].query.first { $0.name == "cursor" })
+    }
+    func testSyncPreservesTwoLoadedPagesAndContinuationCursor() async throws {
+        let api = ParityChatAPI(); let store = ChatStore(api: api)
+        let first = conversation("first", workspace: "writing")
+        let older = conversation("older", workspace: "writing")
+        var changed = older; changed.title = "Renamed remotely"; changed.revision = 2
+        api.handler = { [self] request in
+            if request.path == "api/conversations" {
+                let secondPage = request.query.contains { $0.name == "cursor" && $0.value == "page-two" }
+                return try encoded(["conversations": [projection(secondPage ? older : first)], "next_cursor": secondPage ? "page-three" : "page-two"])
+            }
+            if request.path == "api/sync" {
+                return try encoded(["changes": [["id": changed.id, "kind": "conversation", "deleted": false, "data": projection(changed)]], "cursor": 1])
+            }
+            return nil
+        }
+        await store.load(query: "message match", workspace: "writing")
+        await store.load(query: "message match", workspace: "writing", more: true)
+        XCTAssertEqual(store.conversations.map(\.id), [first.id, older.id])
+        XCTAssertEqual(store.nextCursor, "page-three")
+        await store.synchronize()
+        XCTAssertEqual(store.conversations.map(\.id), [first.id, older.id])
+        XCTAssertEqual(store.conversations.last?.title, "Renamed remotely")
+        XCTAssertEqual(store.nextCursor, "page-three")
+        XCTAssertEqual(api.requests.filter { $0.path == "api/conversations" }.count, 2)
+    }
+    func testOtherRowMutationPreservesComposerAndActiveRunAndScope() async throws {
+        let api = ParityChatAPI(); let store = ChatStore(api: api)
+        let selected = conversation("selected", workspace: "writing")
+        let other = conversation("other", workspace: "writing")
+        let moved = conversation("other", workspace: "elsewhere", revision: 2)
+        api.handler = { [self] request in
+            if request.method == "PATCH" { return try encoded(["conversation": projection(moved)]) }
+            if request.path == "api/conversations" { return Data("{\"conversations\":[],\"next_cursor\":null}".utf8) }
+            return nil
+        }
+        await store.load(workspace: "writing")
+        store.selected = selected; store.conversations = [selected, other]; store.draft = "Keep draft"
+        store.messages = [HopeMessage(id: "m", conversationId: selected.id, role: "assistant", content: "Streaming", status: "streaming", runId: "r", createdAt: 1)]
+        store.runs = [HopeRun(id: "r", conversationId: selected.id, status: "running", messageId: "m", createdAt: 1, updatedAt: 1, error: nil)]
+        XCTAssertFalse(store.canMutate(selected)); XCTAssertTrue(store.canMutate(other))
+        await store.patch(other, changes: ["workspace_id": "elsewhere"])
+        XCTAssertEqual(store.selected, selected); XCTAssertEqual(store.draft, "Keep draft")
+        XCTAssertEqual(store.messages.first?.content, "Streaming"); XCTAssertEqual(store.activeRun?.id, "r")
+        XCTAssertEqual(api.requests.last { $0.path == "api/conversations" }?.query.first { $0.name == "workspace_id" }?.value, "writing")
+        XCTAssertFalse(store.conversations.contains { $0.id == other.id })
+    }
+    func testMutationCompletionSurvivesNavigationButNotAccountClose() async throws {
+        for close in [false, true] {
+            let api = ParityChatAPI(); let store = ChatStore(api: api)
+            await store.create(); let first = try XCTUnwrap(store.selected)
+            await store.create(); let second = try XCTUnwrap(store.selected)
+            var finish: CheckedContinuation<Void, Never>?
+            var started: CheckedContinuation<Void, Never>?
+            api.handler = { request in
+                if request.method == "PATCH" {
+                    started?.resume(); started = nil
+                    await withCheckedContinuation { finish = $0 }
+                }
+                return nil
+            }
+            let operation = Task { await store.patch(first, changes: ["title": "Renamed"]) }
+            await withCheckedContinuation { started = $0 }
+            if close { store.close() } else { await store.open(first); await store.open(second) }
+            finish?.resume(); await operation.value
+            if close { XCTAssertTrue(store.conversations.isEmpty); XCTAssertNil(store.selected) }
+            else { XCTAssertEqual(store.selected?.id, second.id); XCTAssertEqual(store.conversations.first { $0.id == first.id }?.title, "Renamed") }
+        }
+    }
+    func testStaleRevisionRefreshesMetadataOnlyAndRetryIsActionable() async throws {
+        let store = ChatStore(api: OfflineChatAPI())
+        await store.create(); let stale = try XCTUnwrap(store.selected)
+        await store.patch(stale, changes: ["title": "Latest"])
+        store.draft = "Private unsent draft"
+        await store.patch(stale, changes: ["title": "Stale overwrite"])
+        XCTAssertEqual(store.selected?.title, "Latest"); XCTAssertEqual(store.draft, "Private unsent draft")
+        XCTAssertTrue(store.error?.contains("latest details are loaded") == true)
+        await store.patch(try XCTUnwrap(store.selected), changes: ["title": "Retry"])
+        XCTAssertEqual(store.selected?.title, "Retry")
+    }
+    func testAttachmentQueueBindsComposerAndRejectsPendingAndUnsupportedFiles() async throws {
+        let store = ChatStore(api: OfflineChatAPI()); await store.create()
+        store.features.enabled = ["attachments"]
+        let epoch = store.draftGeneration
+        let accepted = await store.queueAttachment(attachment("a"), expectedDraftGeneration: epoch)
+        XCTAssertTrue(accepted)
+        let image = await store.queueAttachment(attachment("image", mime: "image/png", status: "image"), expectedDraftGeneration: epoch)
+        XCTAssertFalse(image)
+        let failed = await store.queueAttachment(attachment("failed", status: "encrypted"), expectedDraftGeneration: epoch)
+        XCTAssertFalse(failed)
+        for i in 1...7 { _ = await store.queueAttachment(attachment("extra-\(i)"), expectedDraftGeneration: epoch) }
+        let excess = await store.queueAttachment(attachment("ninth"), expectedDraftGeneration: epoch)
+        XCTAssertFalse(excess); XCTAssertEqual(store.selectedAttachmentIds.count, 8)
+        store.busy = true
+        let pending = await store.queueAttachment(attachment("pending"), expectedDraftGeneration: epoch)
+        XCTAssertFalse(pending); store.busy = false
+        await store.create()
+        let stale = await store.queueAttachment(attachment("stale"), expectedDraftGeneration: epoch)
+        XCTAssertFalse(stale); XCTAssertTrue(store.selectedAttachmentIds.isEmpty)
+        store.close()
+        let closed = await store.queueAttachment(attachment("closed"))
+        XCTAssertFalse(closed)
+    }
+    func testUnavailableAttachmentCanBeRemovedAndFreshQueueWins() async throws {
+        let store = ChatStore(api: OfflineChatAPI()); await store.create()
+        store.features.enabled = ["attachments"]
+        let current = attachment("a")
+        let accepted = await store.queueAttachment(current)
+        XCTAssertTrue(accepted)
+        store.features.attachments = [attachment("a", status: "failed")]
+        XCTAssertEqual(store.queuedAttachment("a")?.extractionStatus, "ready")
+        XCTAssertTrue(store.canSendAttachments)
+        store.selectedAttachmentIds.insert("missing")
+        XCTAssertNil(store.queuedAttachment("missing"))
+        XCTAssertFalse(store.canSendAttachments)
+        store.selectedAttachmentIds.remove("missing")
+        XCTAssertTrue(store.canSendAttachments)
+        store.close()
+    }
+    func testEditAndRegenerateResendExactOriginalAttachmentIDs() async throws {
+        for regenerate in [false, true] {
+            let api = ParityChatAPI(); let store = ChatStore(api: api)
+            await store.create(); store.draft = "Original"; await store.send()
+            let ids = ["00000000000000000000000000000001", "00000000000000000000000000000002"]
+            store.messages[0].attachments = ids
+            api.handler = { request in
+                if request.path.hasPrefix("api/attachments/") {
+                    let id = String(request.path.split(separator: "/").last!)
+                    return Data("{\"attachment\":{\"id\":\"\(id)\",\"filename\":\"notes.txt\",\"mime\":\"text/plain\",\"size\":12,\"extraction_status\":\"ready\",\"created_at\":1}}".utf8)
+                }
+                return nil
+            }
+            let target = try XCTUnwrap(regenerate ? store.messages.last : store.messages.first)
+            await store.branch(target, edited: regenerate ? nil : "Edited", regenerate: regenerate)
+            let resent = try XCTUnwrap(api.requests.last { $0.path.hasSuffix("/messages") })
+            XCTAssertEqual(resent.body?["attachment_ids"] as? [String], ids)
+        }
+    }
+    func testModelSaveRefreshFailureDisablesImageCapability() async throws {
+        let api = ParityChatAPI(); let store = ChatStore(api: api)
+        await store.create()
+        store.features.enabled = ["attachments", "image_input"]
+        let image = attachment("qualified-image", mime: "image/png", status: "image")
+        let queued = await store.queueAttachment(image, expectedDraftGeneration: store.draftGeneration)
+        XCTAssertTrue(queued); XCTAssertTrue(store.canSendAttachments)
+        store.draft = "Keep this image draft"
+        api.handler = { request in
+            if request.path == "api/settings/model" { return Data("{\"settings\":{\"model\":\"auto\",\"thinking_level\":\"off\"},\"message\":null}".utf8) }
+            if request.path == "api/capabilities" { throw ChatFailure.status(503) }
+            return nil
+        }
+        await store.saveModel()
+        XCTAssertFalse(store.features.enabled.contains("image_input"))
+        XCTAssertTrue(api.requests.contains { $0.path == "api/capabilities" })
+        XCTAssertFalse(store.canSendAttachments)
+        await store.send()
+        XCTAssertFalse(api.requests.contains { $0.path.hasSuffix("/messages") })
+        XCTAssertEqual(store.draft, "Keep this image draft")
+        XCTAssertEqual(store.selectedAttachmentIds, Set([image.id]))
+        XCTAssertTrue(store.error?.contains("current model") == true)
+    }
+}