AI Coach fixed

services/geminiService.ts

@@ -1,7 +1,7 @@
 import { WorkoutSession } from '../types';
 import { api } from './api';
 
-export const createFitnessChat = (history: WorkoutSession[]): any => {
+export const createFitnessChat = (history: WorkoutSession[], lang: 'en' | 'ru' = 'ru'): any => {
   // The original returned a Chat object.
   // Now we need to return something that behaves like it or refactor the UI.
   // The UI likely calls `chat.sendMessage(msg)`.
@@ -9,12 +9,12 @@ export const createFitnessChat = (history: WorkoutSession[]): any => {
 
   // Summarize data to reduce token count while keeping relevant context
   const summary = history.slice(0, 10).map(s => ({
-    date: new Date(s.startTime).toLocaleDateString('ru-RU'),
+    date: new Date(s.startTime).toLocaleDateString(lang === 'ru' ? 'ru-RU' : 'en-US'),
     userWeight: s.userBodyWeight,
-    exercises: s.sets.map(set => `${set.exerciseName}: ${set.weight ? set.weight + 'кг' : ''}${set.reps ? ' x ' + set.reps + 'повт' : ''} ${set.distanceMeters ? set.distanceMeters + 'м' : ''}`).join(', ')
+    exercises: s.sets.map(set => `${set.exerciseName}: ${set.weight ? set.weight + (lang === 'ru' ? 'кг' : 'kg') : ''}${set.reps ? ' x ' + set.reps + (lang === 'ru' ? 'повт' : 'reps') : ''} ${set.distanceMeters ? set.distanceMeters + (lang === 'ru' ? 'м' : 'm') : ''}`).join(', ')
   }));
 
-  const systemInstruction = `
+  const systemInstruction = lang === 'ru' ? `
     Ты — опытный и поддерживающий фитнес-тренер. 
     Твоя задача — анализировать тренировки пользователя и давать краткие, полезные советы на русском языке.
     
@@ -25,6 +25,18 @@ export const createFitnessChat = (history: WorkoutSession[]): any => {
 
     Если пользователь спрашивает о прогрессе, используй эти данные.
     Отвечай емко, мотивирующе. Избегай длинных лекций, если не просили.
+  ` : `
+    You are an experienced and supportive fitness coach.
+    Your task is to analyze the user's workouts and provide concise, helpful advice in English.
+    
+    Consider the user's weight (userWeight in json), if provided, when analyzing progress in bodyweight exercises.
+    
+    Here are the user's last 10 workouts (in JSON format):
+    ${JSON.stringify(summary)}
+
+    If the user asks about progress, use this data.
+    Answer concisely and motivationally. Avoid long lectures unless asked.
+    ALWAYS answer in the language the user speaks to you, defaulting to English if unsure.
   `;
 
   return {
@@ -34,6 +46,7 @@ export const createFitnessChat = (history: WorkoutSession[]): any => {
         userMessage
       });
       return {
+        text: res.response,
         response: {
           text: () => res.response
         }