(core) Show tweaked formula in AI responses

Summary:
The formula that's used when the Apply button is clicked, and the formula that's
shown in responses from the Formula Assistant should now be the same. Previously, they
would differ slightly.

Test Plan: Server tests.

Reviewers: alexmojaki

Reviewed By: alexmojaki

Subscribers: alexmojaki

Differential Revision: https://phab.getgrist.com/D3977

app/client/widgets/FormulaAssistant.ts

@@ -635,25 +635,24 @@ export class FormulaAssistant extends Disposable {
     // Get the state of the chat from the column.
     const conversationId = this._chat.conversationId.get();
     const prevState = column.chatHistory.peek().get().state;
-    const {reply, suggestedActions, state} = await askAI(gristDoc, {
+    const {reply, suggestedActions, suggestedFormula, state} = await askAI(gristDoc, {
       conversationId,
       column,
       description,
       state: prevState,
     });
-    console.debug('suggestedActions', {suggestedActions, reply, state});
+    console.debug('received formula assistant response: ', {suggestedActions, suggestedFormula, reply, state});
     // If back-end is capable of conversation, keep its state.
     const chatHistoryNew = column.chatHistory.peek();
     const value = chatHistoryNew.get();
     value.state = state;
-    const formula = (suggestedActions[0]?.[3] as any)?.formula as string;
     // If model has a conversational skills (and maintains a history), we might get actually
     // some markdown text back, so we need to parse it.
-    const prettyMessage = state ? (reply || formula || '') : (formula || reply || '');
+    const prettyMessage = state ? (reply || suggestedFormula || '') : (suggestedFormula || reply || '');
     // Add it to the chat.
     return {
       message: prettyMessage,
-      formula,
+      formula: suggestedFormula,
       action: suggestedActions[0],
       sender: 'ai',
     };