feat(04-03-partial): ExercisePicker and WorkoutEditPage components - swap/add/remove exercises with sets/reps editing

frontend/src/index.js

@@ -0,0 +1,30 @@
+import React from 'react'
+import { createRoot } from 'react-dom/client'
+import './styles/App.css'
+import WorkoutPage from './pages/WorkoutPage'
+
+const App = () => {
+  // Minimal placeholder data to mount the page standalone
+  const day = {
+    name: 'Push A',
+    day_number: 1,
+    exercises: [
+      { id: 1, name: 'Bench Press', muscle_group: 'Bröst', sets: 3, reps_min: 8, reps_max: 12 },
+      { id: 2, name: 'Overhead Press', muscle_group: 'Axlar', sets: 3, reps_min: 8, reps_max: 12 }
+    ]
+  }
+  const week = 1
+  const logs = {}
+  const onBack = () => { console.log('Back') }
+  const fetchProgression = async (id) => ({ suggestedWeight: 20 })
+  const onLogSet = () => {}
+  const onDeleteSet = () => {}
+  return (
+    <div className="app">
+      <WorkoutPage day={day} week={week} logs={logs} onBack={onBack} fetchProgression={fetchProgression} onLogSet={onLogSet} onDeleteSet={onDeleteSet} />
+    </div>
+  )
+}
+
+const root = createRoot(document.getElementById('root'))
+root.render(<App />)