feat(02-02): OutputReview summary counter with regenerated/edited tracking

- Add regeneratedSlots Set to track regenerated post indices
- Add summary counter showing: N post, X generati, Y rigenerati, Z modificati
- Counter updates in real-time after each regeneration or inline edit
- Pass isRegenerated prop to PostCard for visual badge
- Update info box to mention regen feature with RefreshCw icon
- Use JSON.stringify comparison for manual edit detection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/OutputReview.tsx

@@ -10,7 +10,7 @@
  * e inviato al backend via POST al momento del download CSV.
  */
 
-import { Download, Loader2 } from 'lucide-react'
+import { Download, Loader2, RefreshCw } from 'lucide-react'
 import { useEffect, useState } from 'react'
 import { useParams } from 'react-router-dom'
 import { useDownloadEditedCsv, useJobResults } from '../api/hooks'
@@ -24,6 +24,8 @@ export function OutputReview() {
 
   // Stato locale dei post — viene aggiornato da edit inline e rigenerazione
   const [localResults, setLocalResults] = useState<PostResult[]>([])
+  // Set di indici dei post che sono stati rigenerati
+  const [regeneratedSlots, setRegeneratedSlots] = useState<Set<number>>(new Set())
 
   // Inizializza i risultati e merge con CalendarSlot dal calendario
   useEffect(() => {
@@ -47,6 +49,7 @@ export function OutputReview() {
     setLocalResults((prev) =>
       prev.map((r) => (r.slot_index === updated.slot_index ? updated : r))
     )
+    setRegeneratedSlots((prev) => new Set(prev).add(updated.slot_index))
   }
 
   async function handleDownloadCsv() {
@@ -82,6 +85,15 @@ export function OutputReview() {
 
   const successCount = localResults.filter((r) => r.status === 'success').length
   const failedCount = localResults.filter((r) => r.status === 'failed').length
+  const regeneratedCount = regeneratedSlots.size
+  // Conteggio post modificati manualmente (diversi dall'originale, esclusi i rigenerati)
+  const editedCount = localResults.filter((r) => {
+    if (r.status !== 'success' || !r.post) return false
+    const original = jobData?.results?.find((o) => o.slot_index === r.slot_index)
+    if (!original?.post) return false
+    return JSON.stringify(r.post) !== JSON.stringify(original.post)
+  }).length
+  const manuallyEditedCount = Math.max(0, editedCount - regeneratedCount)
 
   // ---------------------------------------------------------------------------
   // UI principale
@@ -94,11 +106,23 @@ export function OutputReview() {
         <div>
           <h1 className="text-2xl font-bold text-stone-100">Output Review</h1>
           <p className="mt-1 text-stone-400 text-sm">{jobData.campagna}</p>
-          <div className="flex items-center gap-4 mt-2">
+          <div className="flex flex-wrap items-center gap-x-4 gap-y-1 mt-2">
+            <span className="text-xs text-stone-300 font-medium">{localResults.length} post</span>
             <span className="text-xs text-emerald-400">{successCount} generati</span>
             {failedCount > 0 && (
               <span className="text-xs text-red-400">{failedCount} falliti</span>
             )}
+            {regeneratedCount > 0 && (
+              <span className="text-xs text-amber-400 flex items-center gap-1">
+                <RefreshCw size={10} />
+                {regeneratedCount} rigenerati
+              </span>
+            )}
+            {manuallyEditedCount > 0 && (
+              <span className="text-xs text-blue-400">
+                {manuallyEditedCount} modificati
+              </span>
+            )}
             <span className="text-xs text-stone-600">job: {jobId}</span>
           </div>
         </div>
@@ -127,7 +151,9 @@ export function OutputReview() {
 
       {/* Info edit inline */}
       <div className="px-4 py-2.5 rounded-lg bg-stone-800/50 border border-stone-700 text-xs text-stone-500">
-        Clicca su una card per espandere le slide. I campi di testo sono editabili inline — le modifiche saranno incluse nel CSV scaricato.
+        Clicca su una card per espandere le slide. I campi di testo sono editabili inline.
+        Usa il pulsante <RefreshCw size={10} className="inline" /> per rigenerare singoli post con topic diversi.
+        Le modifiche saranno incluse nel CSV scaricato.
       </div>
 
       {/* Griglia post */}
@@ -146,6 +172,7 @@ export function OutputReview() {
               tono={null}
               onRegenerated={handleRegenerated}
               onEdit={handleEdit}
+              isRegenerated={regeneratedSlots.has(result.slot_index)}
             />
           ))
         )}