chore: update Fastlane configuration and clean up API service

- Updated the Deliverfile to submit for review and skip metadata and screenshots.
- Removed outdated build lane from Fastfile.
- Refactored API service to eliminate fallback to latest assistant message, addressing duplication issues in multi-turn conversations.

ios/fastlane/Deliverfile

@@ -1,3 +1,7 @@
 # The Deliverfile allows you to store various App Store Connect metadata
 # For more information, check out the docs
 # https://docs.fastlane.tools/actions/deliver/
+submit_for_review(true)
+skip_metadata(true)
+skip_screenshots(true)
+ipa("../build/ios/ipa/conduit.ipa")

ios/fastlane/Fastfile

@@ -11,15 +11,4 @@
 #
 
 # Uncomment the line if you want fastlane to automatically update itself
-# update_fastlane
+# update_fastlane
-
-default_platform(:ios)
-
-platform :ios do
-  desc "Push a new release build to the App Store"
-  lane :release do
-    skip_build_archive: true,
-    archive_path: "../build/ios/archive/Runner.xcarchive",
-    upload_to_app_store
-  end
-end

lib/core/services/api_service.dart

@@ -3317,60 +3317,10 @@ class ApiService {
           }
         }
 
-        // 4) If nothing found by id, fall back to the latest assistant message
+        // Note: We intentionally removed the fallback to "any latest assistant message"
-        if (content.isEmpty) {
+        // because it causes duplication issues in multi-turn conversations.
-          // Prefer chat.messages list
+        // If we can't find the specific message by ID, we skip this poll iteration
-          if (chatObj != null && chatObj['messages'] is List) {
+        // and wait for the next one rather than showing content from a different message.
-            final List messagesList = chatObj['messages'] as List;
-            // Find last assistant
-            for (int i = messagesList.length - 1; i >= 0; i--) {
-              final m = messagesList[i];
-              if (m is Map && (m['role']?.toString() == 'assistant')) {
-                final rawContent = m['content'];
-                if (rawContent is String) {
-                  content = rawContent;
-                } else if (rawContent is List) {
-                  final textItem = rawContent.firstWhere(
-                    (i) => i is Map && i['type'] == 'text',
-                    orElse: () => null,
-                  );
-                  if (textItem != null) {
-                    content = textItem['text']?.toString() ?? '';
-                  }
-                }
-                if (content.isNotEmpty) break;
-              }
-            }
-          }
-
-          // Try history map if still empty
-          if (content.isEmpty && chatObj != null) {
-            final history = chatObj['history'];
-            if (history is Map && history['messages'] is Map) {
-              final Map<dynamic, dynamic> msgMapDyn =
-                  history['messages'] as Map;
-              // Iterate by values; no guaranteed ordering, but often sufficient
-              for (final entry in msgMapDyn.values) {
-                if (entry is Map &&
-                    (entry['role']?.toString() == 'assistant')) {
-                  final rawContent = entry['content'];
-                  if (rawContent is String) {
-                    content = rawContent;
-                  } else if (rawContent is List) {
-                    final textItem = rawContent.firstWhere(
-                      (i) => i is Map && i['type'] == 'text',
-                      orElse: () => null,
-                    );
-                    if (textItem != null) {
-                      content = textItem['text']?.toString() ?? '';
-                    }
-                  }
-                  if (content.isNotEmpty) break;
-                }
-              }
-            }
-          }
-        }
 
         if (content.isEmpty) {
           continue;