feat(ios): ai button feature flag (#13280)

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

## Summary by CodeRabbit

* **New Features**
  * Added a global API to check the AI button feature flag status.

* **Bug Fixes**
* Improved handling for the AI button feature: the app now checks the
feature flag before proceeding and provides a clear error if the feature
is disabled.

* **Refactor**
  * Removed all AI button presentation and dismissal logic from the app.
* Deleted unused plugin interfaces and registration related to the AI
button feature.

* **Chores**
  * Updated project metadata and build configuration for iOS.

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

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/Extension/BridgedWindowScript.swift

@@ -17,6 +17,7 @@ enum BridgedWindowScript: String {
   case getCurrentServerBaseUrl = "window.getCurrentServerBaseUrl()"
   case getCurrentWorkspaceId = "window.getCurrentWorkspaceId();"
   case getCurrentDocId = "window.getCurrentDocId();"
+  case getAiButtonFeatureFlag = "window.getAiButtonFeatureFlag();"
   case getCurrentI18nLocale = "window.getCurrentI18nLocale();"
   case createNewDocByMarkdownInCurrentWorkspace = "return await window.createNewDocByMarkdownInCurrentWorkspace(markdown, title);"
 

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/IntelligentContext/IntelligentContext+WebView.swift

@@ -17,6 +17,7 @@ extension IntelligentContext {
       (.currentWorkspaceId, .getCurrentWorkspaceId),
       (.currentServerBaseUrl, .getCurrentServerBaseUrl),
       (.currentI18nLocale, .getCurrentI18nLocale),
+      (.currentAiButtonFeatureFlag, .getAiButtonFeatureFlag),
     ]
     for (key, script) in keysAndScripts {
       DispatchQueue.main.async {

packages/frontend/apps/ios/App/Packages/Intelligents/Sources/Intelligents/IntelligentContext/IntelligentContext.swift

@@ -40,6 +40,7 @@ public class IntelligentContext {
     case currentWorkspaceId
     case currentServerBaseUrl
     case currentI18nLocale
+    case currentAiButtonFeatureFlag
   }
 
   @Published public private(set) var currentSession: ChatSessionObject?
@@ -53,6 +54,7 @@ public class IntelligentContext {
   public enum IntelligentError: Error, LocalizedError {
     case loginRequired(String)
     case sessionCreationFailed(String)
+    case featureClosed
 
     public var errorDescription: String? {
       switch self {
@@ -60,6 +62,8 @@ public class IntelligentContext {
         "Login required: \(reason)"
       case let .sessionCreationFailed(reason):
         "Session creation failed: \(reason)"
+      case let .featureClosed:
+        "Intelligent feature closed"
       }
     }
   }
@@ -81,6 +85,11 @@ public class IntelligentContext {
       }
       webViewGroup.wait()
       webViewMetadata = webViewMetadataResult
+      
+      if webViewMetadataResult[.currentAiButtonFeatureFlag] as? Bool == false {
+        completion(.failure(IntelligentError.featureClosed))
+        return
+      }
 
       // Check required webView metadata
       guard let baseUrlString = webViewMetadataResult[.currentServerBaseUrl] as? String,