1. Tailwind migretion. 2. Backend Type Safety. 3. Context Refactoring.

src/App.tsx

@@ -8,27 +8,12 @@ import AICoach from './components/AICoach';
 import Plans from './components/Plans';
 import Login from './components/Login';
 import Profile from './components/Profile';
-import { Language, User } from './types'; // Removed unused imports
+import { Language, User } from './types';
 import { getSystemLanguage } from './services/i18n';
 import { useAuth } from './context/AuthContext';
-import { useData } from './context/DataContext';
 
 function App() {
   const { currentUser, updateUser, logout } = useAuth();
-  const {
-    sessions,
-    plans,
-    activeSession,
-    activePlan,
-    startSession,
-    endSession,
-    quitSession,
-    addSet,
-    removeSet,
-    updateSet,
-    updateSession,
-    deleteSessionById
-  } = useData();
 
   const [language, setLanguage] = useState<Language>('en');
   const navigate = useNavigate();
@@ -70,36 +55,19 @@ function App() {
               )
             } />
             <Route path="/" element={
-              <Tracker
-                userId={currentUser?.id || ''}
-                userWeight={currentUser?.profile?.weight}
-                activeSession={activeSession}
-                activePlan={activePlan}
-                onSessionStart={startSession}
-                onSessionEnd={endSession}
-                onSessionQuit={quitSession}
-                onSetAdded={addSet}
-                onRemoveSet={removeSet}
-                onUpdateSet={updateSet}
-                lang={language}
-              />
+              <Tracker lang={language} />
             } />
             <Route path="/plans" element={
-              <Plans userId={currentUser?.id || ''} onStartPlan={startSession} lang={language} />
+              <Plans lang={language} />
             } />
             <Route path="/history" element={
-              <History
-                sessions={sessions}
-                onUpdateSession={updateSession}
-                onDeleteSession={deleteSessionById}
-                lang={language}
-              />
+              <History lang={language} />
             } />
             <Route path="/stats" element={
-              <Stats sessions={sessions} lang={language} />
+              <Stats lang={language} />
             } />
             <Route path="/coach" element={
-              <AICoach history={sessions} userProfile={currentUser?.profile} plans={plans} lang={language} />
+              <AICoach lang={language} />
             } />
             <Route path="/profile" element={
               <Profile