fix: openai for summarize doesn't work when mutliple selecting (#1904)

frontend/appflowy_flutter/lib/plugins/document/presentation/plugins/openai/service/openai_client.dart

@@ -37,7 +37,7 @@ abstract class OpenAIRepository {
   Future<Either<OpenAIError, TextCompletionResponse>> getCompletions({
     required String prompt,
     String? suffix,
-    int maxTokens = 50,
+    int maxTokens = 500,
     double temperature = .3,
   });
 
@@ -72,7 +72,7 @@ class HttpOpenAIRepository implements OpenAIRepository {
   Future<Either<OpenAIError, TextCompletionResponse>> getCompletions({
     required String prompt,
     String? suffix,
-    int maxTokens = 50,
+    int maxTokens = 500,
     double temperature = 0.3,
   }) async {
     final parameters = {
@@ -102,12 +102,14 @@ class HttpOpenAIRepository implements OpenAIRepository {
     required String input,
     required String instruction,
     double temperature = 0.3,
+    int n = 1,
   }) async {
     final parameters = {
       'model': 'text-davinci-edit-001',
       'input': input,
       'instruction': instruction,
       'temperature': temperature,
+      'n': n,
     };
 
     final response = await client.post(

frontend/appflowy_flutter/lib/plugins/document/presentation/plugins/openai/widgets/smart_edit_action.dart

@@ -10,9 +10,9 @@ enum SmartEditAction {
   String get toInstruction {
     switch (this) {
       case SmartEditAction.summarize:
-        return 'Summarize';
+        return 'Make it shorter';
       case SmartEditAction.fixSpelling:
-        return 'Fix the spelling mistakes';
+        return 'Fix all the spelling mistakes';
     }
   }
 }

frontend/appflowy_flutter/lib/plugins/document/presentation/plugins/openai/widgets/smart_edit_node_widget.dart

@@ -254,6 +254,7 @@ class _SmartEditInputState extends State<_SmartEditInput> {
       final edits = await openAIRepository.getEdits(
         input: input,
         instruction: instruction,
+        n: input.split('\n').length,
       );
       return edits.fold((error) async {
         return dartz.Left(