chore: created first ai stream (#12968)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced a redesigned chat interface with new cell types for user,
assistant, system, loading, and error messages.
  * Added streaming chat responses and improved session management.
* Enhanced input box behavior, allowing sending messages with the return
key and inserting new lines via the edit menu.
* Added new GraphQL queries for fetching recent and latest chat
sessions.

* **Refactor**
* Replaced previous chat message and session management with a new, more
structured view model system.
* Updated chat view to use a custom table view component for better
message rendering and empty state handling.
* Simplified and improved error and loading state handling in the chat
UI.

* **Bug Fixes**
  * Improved error reporting and retry options for failed chat messages.
  * Fixed inconsistent property types for message and error identifiers.

* **Style**
* Updated UI components for chat cells with modern layouts and
consistent styling.

* **Chores**
  * Added a new package dependency for event streaming support.
* Renamed various internal properties and classes for clarity and
consistency.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/ios/App/Packages/AffineGraphQL/Sources/Operations/Queries/GetCopilotLatestDocSessionQuery.graphql.swift

@@ -0,0 +1,141 @@
+// @generated
+// This file was automatically generated and should not be edited.
+
+@_exported import ApolloAPI
+
+public class GetCopilotLatestDocSessionQuery: GraphQLQuery {
+  public static let operationName: String = "getCopilotLatestDocSession"
+  public static let operationDocument: ApolloAPI.OperationDocument = .init(
+    definition: .init(
+      #"query getCopilotLatestDocSession($workspaceId: String!, $docId: String!) { currentUser { __typename copilot(workspaceId: $workspaceId) { __typename histories( docId: $docId options: { limit: 1, sessionOrder: desc, action: false, fork: false } ) { __typename sessionId workspaceId docId pinned action tokens createdAt updatedAt messages { __typename id role content attachments params createdAt } } } } }"#
+    ))
+
+  public var workspaceId: String
+  public var docId: String
+
+  public init(
+    workspaceId: String,
+    docId: String
+  ) {
+    self.workspaceId = workspaceId
+    self.docId = docId
+  }
+
+  public var __variables: Variables? { [
+    "workspaceId": workspaceId,
+    "docId": docId
+  ] }
+
+  public struct Data: AffineGraphQL.SelectionSet {
+    public let __data: DataDict
+    public init(_dataDict: DataDict) { __data = _dataDict }
+
+    public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.Query }
+    public static var __selections: [ApolloAPI.Selection] { [
+      .field("currentUser", CurrentUser?.self),
+    ] }
+
+    /// Get current user
+    public var currentUser: CurrentUser? { __data["currentUser"] }
+
+    /// CurrentUser
+    ///
+    /// Parent Type: `UserType`
+    public struct CurrentUser: AffineGraphQL.SelectionSet {
+      public let __data: DataDict
+      public init(_dataDict: DataDict) { __data = _dataDict }
+
+      public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.UserType }
+      public static var __selections: [ApolloAPI.Selection] { [
+        .field("__typename", String.self),
+        .field("copilot", Copilot.self, arguments: ["workspaceId": .variable("workspaceId")]),
+      ] }
+
+      public var copilot: Copilot { __data["copilot"] }
+
+      /// CurrentUser.Copilot
+      ///
+      /// Parent Type: `Copilot`
+      public struct Copilot: AffineGraphQL.SelectionSet {
+        public let __data: DataDict
+        public init(_dataDict: DataDict) { __data = _dataDict }
+
+        public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.Copilot }
+        public static var __selections: [ApolloAPI.Selection] { [
+          .field("__typename", String.self),
+          .field("histories", [History].self, arguments: [
+            "docId": .variable("docId"),
+            "options": [
+              "limit": 1,
+              "sessionOrder": "desc",
+              "action": false,
+              "fork": false
+            ]
+          ]),
+        ] }
+
+        public var histories: [History] { __data["histories"] }
+
+        /// CurrentUser.Copilot.History
+        ///
+        /// Parent Type: `CopilotHistories`
+        public struct History: AffineGraphQL.SelectionSet {
+          public let __data: DataDict
+          public init(_dataDict: DataDict) { __data = _dataDict }
+
+          public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.CopilotHistories }
+          public static var __selections: [ApolloAPI.Selection] { [
+            .field("__typename", String.self),
+            .field("sessionId", String.self),
+            .field("workspaceId", String.self),
+            .field("docId", String?.self),
+            .field("pinned", Bool.self),
+            .field("action", String?.self),
+            .field("tokens", Int.self),
+            .field("createdAt", AffineGraphQL.DateTime.self),
+            .field("updatedAt", AffineGraphQL.DateTime.self),
+            .field("messages", [Message].self),
+          ] }
+
+          public var sessionId: String { __data["sessionId"] }
+          public var workspaceId: String { __data["workspaceId"] }
+          public var docId: String? { __data["docId"] }
+          public var pinned: Bool { __data["pinned"] }
+          /// An mark identifying which view to use to display the session
+          public var action: String? { __data["action"] }
+          /// The number of tokens used in the session
+          public var tokens: Int { __data["tokens"] }
+          public var createdAt: AffineGraphQL.DateTime { __data["createdAt"] }
+          public var updatedAt: AffineGraphQL.DateTime { __data["updatedAt"] }
+          public var messages: [Message] { __data["messages"] }
+
+          /// CurrentUser.Copilot.History.Message
+          ///
+          /// Parent Type: `ChatMessage`
+          public struct Message: AffineGraphQL.SelectionSet {
+            public let __data: DataDict
+            public init(_dataDict: DataDict) { __data = _dataDict }
+
+            public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.ChatMessage }
+            public static var __selections: [ApolloAPI.Selection] { [
+              .field("__typename", String.self),
+              .field("id", AffineGraphQL.ID?.self),
+              .field("role", String.self),
+              .field("content", String.self),
+              .field("attachments", [String]?.self),
+              .field("params", AffineGraphQL.JSON?.self),
+              .field("createdAt", AffineGraphQL.DateTime.self),
+            ] }
+
+            public var id: AffineGraphQL.ID? { __data["id"] }
+            public var role: String { __data["role"] }
+            public var content: String { __data["content"] }
+            public var attachments: [String]? { __data["attachments"] }
+            public var params: AffineGraphQL.JSON? { __data["params"] }
+            public var createdAt: AffineGraphQL.DateTime { __data["createdAt"] }
+          }
+        }
+      }
+    }
+  }
+}

packages/frontend/apps/ios/App/Packages/AffineGraphQL/Sources/Operations/Queries/GetCopilotRecentSessionsQuery.graphql.swift

@@ -0,0 +1,108 @@
+// @generated
+// This file was automatically generated and should not be edited.
+
+@_exported import ApolloAPI
+
+public class GetCopilotRecentSessionsQuery: GraphQLQuery {
+  public static let operationName: String = "getCopilotRecentSessions"
+  public static let operationDocument: ApolloAPI.OperationDocument = .init(
+    definition: .init(
+      #"query getCopilotRecentSessions($workspaceId: String!, $limit: Int = 10) { currentUser { __typename copilot(workspaceId: $workspaceId) { __typename histories(options: { limit: $limit, sessionOrder: desc }) { __typename sessionId workspaceId docId pinned action tokens createdAt updatedAt } } } }"#
+    ))
+
+  public var workspaceId: String
+  public var limit: GraphQLNullable<Int>
+
+  public init(
+    workspaceId: String,
+    limit: GraphQLNullable<Int> = 10
+  ) {
+    self.workspaceId = workspaceId
+    self.limit = limit
+  }
+
+  public var __variables: Variables? { [
+    "workspaceId": workspaceId,
+    "limit": limit
+  ] }
+
+  public struct Data: AffineGraphQL.SelectionSet {
+    public let __data: DataDict
+    public init(_dataDict: DataDict) { __data = _dataDict }
+
+    public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.Query }
+    public static var __selections: [ApolloAPI.Selection] { [
+      .field("currentUser", CurrentUser?.self),
+    ] }
+
+    /// Get current user
+    public var currentUser: CurrentUser? { __data["currentUser"] }
+
+    /// CurrentUser
+    ///
+    /// Parent Type: `UserType`
+    public struct CurrentUser: AffineGraphQL.SelectionSet {
+      public let __data: DataDict
+      public init(_dataDict: DataDict) { __data = _dataDict }
+
+      public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.UserType }
+      public static var __selections: [ApolloAPI.Selection] { [
+        .field("__typename", String.self),
+        .field("copilot", Copilot.self, arguments: ["workspaceId": .variable("workspaceId")]),
+      ] }
+
+      public var copilot: Copilot { __data["copilot"] }
+
+      /// CurrentUser.Copilot
+      ///
+      /// Parent Type: `Copilot`
+      public struct Copilot: AffineGraphQL.SelectionSet {
+        public let __data: DataDict
+        public init(_dataDict: DataDict) { __data = _dataDict }
+
+        public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.Copilot }
+        public static var __selections: [ApolloAPI.Selection] { [
+          .field("__typename", String.self),
+          .field("histories", [History].self, arguments: ["options": [
+            "limit": .variable("limit"),
+            "sessionOrder": "desc"
+          ]]),
+        ] }
+
+        public var histories: [History] { __data["histories"] }
+
+        /// CurrentUser.Copilot.History
+        ///
+        /// Parent Type: `CopilotHistories`
+        public struct History: AffineGraphQL.SelectionSet {
+          public let __data: DataDict
+          public init(_dataDict: DataDict) { __data = _dataDict }
+
+          public static var __parentType: any ApolloAPI.ParentType { AffineGraphQL.Objects.CopilotHistories }
+          public static var __selections: [ApolloAPI.Selection] { [
+            .field("__typename", String.self),
+            .field("sessionId", String.self),
+            .field("workspaceId", String.self),
+            .field("docId", String?.self),
+            .field("pinned", Bool.self),
+            .field("action", String?.self),
+            .field("tokens", Int.self),
+            .field("createdAt", AffineGraphQL.DateTime.self),
+            .field("updatedAt", AffineGraphQL.DateTime.self),
+          ] }
+
+          public var sessionId: String { __data["sessionId"] }
+          public var workspaceId: String { __data["workspaceId"] }
+          public var docId: String? { __data["docId"] }
+          public var pinned: Bool { __data["pinned"] }
+          /// An mark identifying which view to use to display the session
+          public var action: String? { __data["action"] }
+          /// The number of tokens used in the session
+          public var tokens: Int { __data["tokens"] }
+          public var createdAt: AffineGraphQL.DateTime { __data["createdAt"] }
+          public var updatedAt: AffineGraphQL.DateTime { __data["updatedAt"] }
+        }
+      }
+    }
+  }
+}