diff --git a/.ai_agency/memory/backlog.json b/.ai_agency/memory/backlog.json
index 16ef298..2f7c9c8 100644
--- a/.ai_agency/memory/backlog.json
+++ b/.ai_agency/memory/backlog.json
@@ -399,14 +399,33 @@
         { "index": 2, "name": "implement_wallet_deduction_in_orders_service", "description": "Deduct user walletBalance and create WalletTransaction in OrdersService.create", "status": "done" },
         { "index": 3, "name": "wire_checkout_page_wallet_sync", "description": "Send paymentMethod in API call and trigger fetchProfile() in CheckoutPage.tsx", "status": "done" }
       ]
+    },
+    {
+      "id": "EPIC-11-TASK-01",
+      "title": "Pet Supplement Consumption Tracking & Depletion Monitor Fix",
+      "description": "Ensure updatePet and setPets in usePetStore update and preserve pet consumptions array locally upon order placement so AI depletion monitor displays remaining supplement levels for active pets.",
+      "architectural_layer": "state_management",
+      "assigned_role": "06_dev_frontend",
+      "priority": "HIGH",
+      "status": "completed",
+      "max_files_allowed": 4,
+      "estimated_minutes": 20,
+      "dependency_task_ids": ["EPIC-10-TASK-01"],
+      "acceptance_criteria": [
+        "ثبت واقعی میزان مکمل‌های خریده‌شده در پایش موجودی پت (usePetStore)",
+        "نمایش لحظه‌ای مکمل‌های خریده‌شده، درصد باقیمانده و تخمین اتمام مصرف پت در پروفایل"
+      ],
+      "sub_steps": [
+        { "index": 1, "name": "update_pet_store_consumptions_persistence", "description": "Always update local pets array in updatePet and preserve consumptions in setPets", "status": "done" }
+      ]
     }
   ],
   "metadata": {
-    "total": 20,
-    "completed": 20,
+    "total": 21,
+    "completed": 21,
     "in_progress": 0,
     "pending": 0,
-    "generated_at": "2026-07-26T20:40:00Z",
-    "decomposition_pass": 8
+    "generated_at": "2026-07-26T20:45:00Z",
+    "decomposition_pass": 9
   }
 }
\ No newline at end of file
diff --git a/.ai_agency/memory/state.json b/.ai_agency/memory/state.json
index 12d2c33..0b0d350 100644
--- a/.ai_agency/memory/state.json
+++ b/.ai_agency/memory/state.json
@@ -7,12 +7,12 @@
   "status": "COMPLETE",
   "checkpoint": {
     "active_agent": "01_auditor",
-    "current_ticket_id": "EPIC-10-TASK-01",
+    "current_ticket_id": "EPIC-11-TASK-01",
     "sub_step": {
-      "index": 3,
-      "total": 3,
-      "name": "wire_checkout_page_wallet_sync",
-      "description": "Full-stack wallet balance deduction and charity donation total persistence in PostgreSQL complete and 100% verified"
+      "index": 1,
+      "total": 1,
+      "name": "update_pet_store_consumptions_persistence",
+      "description": "Pet supplement consumption tracking and AI stock monitor persistence complete and 100% verified"
     }
   },
   "review_phase": {
diff --git a/frontend/application/components/CheckoutPage.tsx b/frontend/application/components/CheckoutPage.tsx
index 6a2935a..82b8d0f 100644
--- a/frontend/application/components/CheckoutPage.tsx
+++ b/frontend/application/components/CheckoutPage.tsx
@@ -125,8 +125,9 @@ export default function CheckoutPage() {
       await fetchProfile();
 
       // 4. Update pet consumptions and charity contributions for active pet
-      if (activePet) {
-        const newConsumptions = [...(activePet.consumptions || [])];
+      const targetPet = activePet || usePetStore.getState().pets[0];
+      if (targetPet) {
+        const newConsumptions = [...(targetPet.consumptions || [])];
         
         items.forEach(item => {
           const existing = newConsumptions.find(c => c.productId === item.product.id);
@@ -142,7 +143,7 @@ export default function CheckoutPage() {
           }
         });
 
-        updatePet(activePet.id, { 
+        updatePet(targetPet.id, { 
           consumptions: newConsumptions
         });
       }
diff --git a/frontend/application/lib/store/usePetStore.ts b/frontend/application/lib/store/usePetStore.ts
index 538ebef..cb25a52 100644
--- a/frontend/application/lib/store/usePetStore.ts
+++ b/frontend/application/lib/store/usePetStore.ts
@@ -135,6 +135,10 @@ export const usePetStore = create<PetStore>()(
         return pets.find((p) => p.id === activePetId) || null;
       },
       updatePet: async (id, updates) => {
+        set((state) => ({
+          pets: state.pets.map((p) => (p.id === id ? { ...p, ...updates } : p)),
+        }));
+
         const { useUserStore } = await import("./userStore");
         const isLoggedIn = useUserStore.getState().isLoggedIn;
 
@@ -154,10 +158,6 @@ export const usePetStore = create<PetStore>()(
             console.error("Failed to update pet via backend API:", error);
             toast.error("خطا در ویرایش اطلاعات پت در سرور");
           }
-        } else {
-          set((state) => ({
-            pets: state.pets.map((p) => (p.id === id ? { ...p, ...updates } : p)),
-          }));
         }
       },
       addReminder: async (petId, reminder) => {
@@ -191,34 +191,38 @@ export const usePetStore = create<PetStore>()(
         }
       },
       setPets: (backendPets) => {
-        const mappedPets: PetProfile[] = backendPets.map(bp => ({
-          id: bp.id,
-          name: bp.name,
-          type: bp.type as any,
-          breed: bp.breed,
-          age: Number(bp.age),
-          weight: Number(bp.weight),
-          activityLevel: bp.activityLevel as any,
-          medicalConditions: bp.medicalConditions?.map((mc: any) => mc.condition) || [],
-          image: bp.imageUrl || undefined,
-          reminders: bp.reminders?.map((r: any) => ({
-            id: r.id,
-            title: r.title,
-            time: r.time,
-            frequency: r.frequency as any,
-            productId: r.productId,
-            completedDates: r.completions?.map((c: any) => c.completedDate) || []
-          })) || [],
-          logs: bp.healthLogs?.map((hl: any) => ({
-            id: hl.id,
-            date: hl.loggedDate,
-            appetite: hl.appetite as any,
-            energy: hl.energy as any,
-            digestion: hl.digestion as any,
-            note: hl.note || undefined
-          })) || [],
-          consumptions: []
-        }));
+        const currentLocalPets = get().pets;
+        const mappedPets: PetProfile[] = backendPets.map(bp => {
+          const existingLocal = currentLocalPets.find(lp => lp.id === bp.id);
+          return {
+            id: bp.id,
+            name: bp.name,
+            type: bp.type as any,
+            breed: bp.breed,
+            age: Number(bp.age),
+            weight: Number(bp.weight),
+            activityLevel: bp.activityLevel as any,
+            medicalConditions: bp.medicalConditions?.map((mc: any) => mc.condition) || [],
+            image: bp.imageUrl || undefined,
+            reminders: bp.reminders?.map((r: any) => ({
+              id: r.id,
+              title: r.title,
+              time: r.time,
+              frequency: r.frequency as any,
+              productId: r.productId,
+              completedDates: r.completions?.map((c: any) => c.completedDate) || []
+            })) || [],
+            logs: bp.healthLogs?.map((hl: any) => ({
+              id: hl.id,
+              date: hl.loggedDate,
+              appetite: hl.appetite as any,
+              energy: hl.energy as any,
+              digestion: hl.digestion as any,
+              note: hl.note || undefined
+            })) || [],
+            consumptions: existingLocal?.consumptions || []
+          };
+        });
         set({ pets: mappedPets, activePetId: get().activePetId && mappedPets.some(p => p.id === get().activePetId) ? get().activePetId : (mappedPets[0]?.id || null) });
       },
     }),