diff --git a/apps/api/src/db/schema.ts b/apps/api/src/db/schema.ts
index 5ea9f6b..8e4e867 100644
--- a/apps/api/src/db/schema.ts
+++ b/apps/api/src/db/schema.ts
@@ -42,6 +42,7 @@ export const performanceSnapshots = pgTable('performance_snapshots', {
     .notNull()
     .references(() => platforms.id),
   capturedAt: timestamptz('captured_at').defaultNow().notNull(),
+  snapshotDate: date('snapshot_date').defaultNow().notNull(),
   periodLabel: varchar('period_label').notNull(),
   viewsSearch: integer('views_search'),
   viewsListing: integer('views_listing'),
@@ -51,7 +52,9 @@ export const performanceSnapshots = pgTable('performance_snapshots', {
   avgDailyRate: numeric('avg_daily_rate'),
   revenueTotal: numeric('revenue_total'),
   rawJson: jsonb('raw_json'),
-});
+}, (table) => [
+  unique('perf_snap_platform_date_uniq').on(table.platformId, table.snapshotDate),
+]);
 
 export const performanceSnapshotsRelations = relations(
   performanceSnapshots,
diff --git a/apps/api/src/routes/performance.ts b/apps/api/src/routes/performance.ts
index aec7b75..3d1b9b1 100644
--- a/apps/api/src/routes/performance.ts
+++ b/apps/api/src/routes/performance.ts
@@ -122,7 +122,7 @@ export default async function (fastify: FastifyInstance) {
 
       const rows = await db
         .select({
-          date: performanceSnapshots.periodLabel,
+          date: performanceSnapshots.snapshotDate,
           capturedAt: performanceSnapshots.capturedAt,
           platformId: performanceSnapshots.platformId,
           viewsSearch: performanceSnapshots.viewsSearch,
diff --git a/apps/frontend/src/pages/Performance.tsx b/apps/frontend/src/pages/Performance.tsx
index 3c68906..06def8f 100644
--- a/apps/frontend/src/pages/Performance.tsx
+++ b/apps/frontend/src/pages/Performance.tsx
@@ -206,7 +206,7 @@ export default function Performance() {
 
   const trends: TrendPoint[] = rawTrends?.length
     ? rawTrends.map((r: any) => ({
-        date: r.capturedAt ? r.capturedAt.split('T')[0].split(' ')[0] : r.date || r.periodLabel,
+        date: r.snapshotDate || r.date || (r.capturedAt ? r.capturedAt.split('T')[0].split(' ')[0] : r.periodLabel),
         platform: r.platformId || r.platform,
         views_search: Number(r.viewsSearch ?? r.views_search ?? 0),
         conversion_rate: Number(r.conversionRate ?? r.conversion_rate ?? 0),
@@ -217,7 +217,7 @@ export default function Performance() {
     : MOCK_TRENDS;
   const snapshots: SnapshotRow[] = rawSnapshots?.length
     ? rawSnapshots.map((r: any) => ({
-        date: r.capturedAt ? r.capturedAt.split('T')[0].split(' ')[0] : r.periodLabel || r.date,
+        date: r.snapshotDate || (r.capturedAt ? r.capturedAt.split('T')[0].split(' ')[0] : r.periodLabel || r.date),
         platform: r.platformId || r.platform,
         views: Number(r.viewsSearch ?? r.views ?? 0),
         clicks: Number(r.viewsListing ?? r.clicks ?? 0),
diff --git a/apps/scraper/src/queue/worker.ts b/apps/scraper/src/queue/worker.ts
index 0bbcad9..7ec3306 100644
--- a/apps/scraper/src/queue/worker.ts
+++ b/apps/scraper/src/queue/worker.ts
@@ -113,11 +113,13 @@ async function persistPerformanceSnapshot(snapshot: any): Promise<void> {
   if (!db) return;
 
   try {
+    const snapshotDate = snapshot.capturedAt.split('T')[0];
     await db`
-      INSERT INTO performance_snapshots (platform_id, captured_at, period_label, views_search, views_listing, conversion_rate, bookings_count, occupancy_rate, avg_daily_rate, revenue_total, raw_json)
+      INSERT INTO performance_snapshots (platform_id, captured_at, snapshot_date, period_label, views_search, views_listing, conversion_rate, bookings_count, occupancy_rate, avg_daily_rate, revenue_total, raw_json)
       VALUES (
         ${snapshot.platformId},
         ${snapshot.capturedAt},
+        ${snapshotDate},
         ${snapshot.periodLabel},
         ${snapshot.viewsSearch},
         ${snapshot.viewsListing},
@@ -128,6 +130,16 @@ async function persistPerformanceSnapshot(snapshot: any): Promise<void> {
         ${snapshot.revenueTotal},
         ${JSON.stringify(snapshot.rawJson)}
       )
+      ON CONFLICT (platform_id, snapshot_date) DO UPDATE SET
+        captured_at = EXCLUDED.captured_at,
+        views_search = EXCLUDED.views_search,
+        views_listing = EXCLUDED.views_listing,
+        conversion_rate = EXCLUDED.conversion_rate,
+        bookings_count = EXCLUDED.bookings_count,
+        occupancy_rate = EXCLUDED.occupancy_rate,
+        avg_daily_rate = EXCLUDED.avg_daily_rate,
+        revenue_total = EXCLUDED.revenue_total,
+        raw_json = EXCLUDED.raw_json
     `;
   } catch (err) {
     console.error('[worker] Failed to persist performance snapshot:', err);