diff --git a/apps/web/src/components/activities/ActivitiesKanban.vue b/apps/web/src/components/activities/ActivitiesKanban.vue
index 265344e..f812b70 100644
--- a/apps/web/src/components/activities/ActivitiesKanban.vue
+++ b/apps/web/src/components/activities/ActivitiesKanban.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { computed, nextTick, ref, watch } from 'vue';
+import { computed, ref, watch } from 'vue';
 import { useRouter } from 'vue-router';
 import axios from 'axios';
 import type {
@@ -71,6 +71,43 @@ let peekLinger = 0;
 const moving = ref(false);
 const stageBusy = ref(false);
 const localOrder = ref<string[] | null>(null);
+/** صف جابه‌جایی تا دراپ پشت‌سرهم قفل نشود؛ در watchdog هم ریست می‌شود */
+let moveChain: Promise<void> = Promise.resolve();
+let moveWatchdog = 0;
+/** هویت درگ بیرون از reactivity تا clear/re-render وسط drop شناسه را نبلعد */
+let dragSessionId: string | null = null;
+let dragVisualTimer = 0;
+
+function clearDragState() {
+  window.clearTimeout(dragVisualTimer);
+  dragSessionId = null;
+  draggingId.value = null;
+  dropStageId.value = null;
+  overlayDeal.value = null;
+  draggingColumnId.value = null;
+}
+
+function resetMoveLock() {
+  window.clearTimeout(moveWatchdog);
+  moving.value = false;
+  moveChain = Promise.resolve();
+}
+
+function armMoveWatchdog() {
+  window.clearTimeout(moveWatchdog);
+  moveWatchdog = window.setTimeout(() => {
+    resetMoveLock();
+  }, 12_000);
+}
+
+function enqueueMove(task: () => Promise<void>) {
+  const run = moveChain.then(task, task);
+  moveChain = run.then(
+    () => undefined,
+    () => undefined,
+  );
+  return run;
+}
 
 const KIND_BADGE: Record<ActivityStageDto['kind'], string | undefined> = {
   open: undefined,
@@ -227,14 +264,12 @@ function onMenuActivity(id: string) {
 }
 
 function onDragStart(deal: PipelineDeal, event: DragEvent) {
-  // اگر شناسهٔ درگ ستون گیر کرده باشد، دراپ کارت را ستون‌جابه‌جا می‌بیند
   draggingColumnId.value = null;
-  draggingId.value = deal.id;
-  overlayDeal.value = deal;
-  const sid = findStageOf(deal.id);
-  overlayAccent.value =
-    (props.stages.find((s) => s.id === sid)?.color as PipelineAccent | undefined) ?? 'green';
-  overlayPos.value = { x: (event.clientX || 0) + 12, y: (event.clientY || 0) + 12 };
+  // قفل/صف مانده از درخواست قبلی را باز کن
+  if (moving.value) resetMoveLock();
+
+  dragSessionId = deal.id;
+  // setData / setDragImage باید همزمان با dragstart باشند
   event.dataTransfer?.setData('text/plain', deal.id);
   if (event.dataTransfer) {
     event.dataTransfer.effectAllowed = 'move';
@@ -242,21 +277,44 @@ function onDragStart(deal: PipelineDeal, event: DragEvent) {
     img.src = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
     event.dataTransfer.setDragImage(img, 0, 0);
   }
-  // بستن پیش‌نمایش وسط dragstart گاهی خودِ درگ را لغو می‌کند
-  if (quickId.value) void nextTick(() => closeQuick());
+
+  const sid = findStageOf(deal.id);
+  overlayAccent.value =
+    (props.stages.find((s) => s.id === sid)?.color as PipelineAccent | undefined) ?? 'green';
+  overlayPos.value = { x: (event.clientX || 0) + 12, y: (event.clientY || 0) + 12 };
+
+  // تغییر DOM (opacity/overlay/بستن peek) داخل dragstart درگ HTML5 را در کروم لغو می‌کند
+  window.clearTimeout(dragVisualTimer);
+  dragVisualTimer = window.setTimeout(() => {
+    if (dragSessionId !== deal.id) return;
+    draggingId.value = deal.id;
+    overlayDeal.value = deal;
+    if (quickId.value) closeQuick();
+  }, 0);
 }
 
 function onDragEnd() {
-  const endedId = draggingId.value;
-  // drop معمولاً قبل از dragend است؛ کمی تأخیر تا fallback شناسه از بین نرود
+  const endedId = dragSessionId ?? draggingId.value;
   window.setTimeout(() => {
-    if (draggingId.value !== endedId) return;
-    draggingId.value = null;
-    dropStageId.value = null;
-    overlayDeal.value = null;
+    if (dragSessionId && dragSessionId !== endedId) return;
+    if (draggingId.value && draggingId.value !== endedId) return;
+    clearDragState();
   }, 0);
 }
 
+function onColumnDragStart(id: string) {
+  window.clearTimeout(dragVisualTimer);
+  dragSessionId = null;
+  draggingId.value = null;
+  overlayDeal.value = null;
+  draggingColumnId.value = id;
+}
+
+function onColumnDragEnd() {
+  draggingColumnId.value = null;
+  dropStageId.value = null;
+}
+
 function onDragOver(stageId: string, event: DragEvent) {
   event.preventDefault();
   dropStageId.value = stageId;
@@ -269,17 +327,19 @@ function onDragOver(stageId: string, event: DragEvent) {
 async function moveCard(activityId: string, toStageId: string, index?: number) {
   const fromStageId = findStageOf(activityId);
   if (!fromStageId) return;
-  const from = columns.value[fromStageId]!;
+  const from = columns.value[fromStageId];
   const to = columns.value[toStageId];
-  if (!to) return;
+  if (!from || !to) return;
   const fromIndex = from.items.findIndex((i) => i.id === activityId);
   const item = from.items[fromIndex];
   if (!item) return;
-  const toStage = props.stages.find((s) => s.id === toStageId)!;
+  const toStage = props.stages.find((s) => s.id === toStageId);
+  if (!toStage) return;
   const same = fromStageId === toStageId;
   const without = (same ? from.items : to.items).filter((i) => i.id !== activityId);
   if (same && index == null) return;
-  let insertAt = index == null || index < 0 ? 0 : index;
+  // بدون ایندکس صریح → ته ستون (هم‌تراز با بورد معامله)
+  let insertAt = index == null || index < 0 ? without.length : index;
   if (same && index != null && index > fromIndex) insertAt -= 1;
   insertAt = Math.max(0, Math.min(insertAt, without.length));
   if (same && insertAt === fromIndex) return;
@@ -301,6 +361,7 @@ async function moveCard(activityId: string, toStageId: string, index?: number) {
   }
 
   moving.value = true;
+  armMoveWatchdog();
   try {
     const { data } = await api.patch<ActivityDto>(`/activities/${activityId}/stage`, {
       stageId: toStageId,
@@ -333,6 +394,7 @@ async function moveCard(activityId: string, toStageId: string, index?: number) {
     }
     emit('error', apiMessage(e, 'جابه‌جایی فعالیت ناموفق بود.'));
   } finally {
+    window.clearTimeout(moveWatchdog);
     moving.value = false;
   }
 }
@@ -340,23 +402,24 @@ async function moveCard(activityId: string, toStageId: string, index?: number) {
 async function onDrop(stageId: string, event: DragEvent, index?: number) {
   event.preventDefault();
   const transfer = event.dataTransfer?.getData('text/plain') || '';
-  const cardId = draggingId.value;
+  const cardId = dragSessionId || draggingId.value;
   const columnId = draggingColumnId.value;
-  dropStageId.value = null;
-  draggingId.value = null;
-  overlayDeal.value = null;
-  draggingColumnId.value = null;
+  clearDragState();
 
-  const isStageDrag = transfer.startsWith('stage:');
-  if (isStageDrag || (!transfer && !cardId && columnId)) {
-    const fromId = isStageDrag ? transfer.slice('stage:'.length) : columnId;
-    if (fromId) await reorderColumn(fromId, stageId);
+  // کارت همیشه بر payload ستون اولویت دارد تا درگ کارت به‌اشتباه reorder ستون نشود
+  const activityId =
+    cardId || (transfer && !transfer.startsWith('stage:') ? transfer : '');
+  if (activityId) {
+    // fire-and-forget: await روی زنجیرهٔ گیرکرده نباید drop بعدی را قفل کند
+    void enqueueMove(() => moveCard(activityId, stageId, index));
     return;
   }
 
-  const activityId = (!isStageDrag && transfer) || cardId || '';
-  if (!activityId || moving.value) return;
-  await moveCard(activityId, stageId, index);
+  const isStageDrag = transfer.startsWith('stage:');
+  if (isStageDrag || columnId) {
+    const fromId = isStageDrag ? transfer.slice('stage:'.length) : columnId;
+    if (fromId) await reorderColumn(fromId, stageId);
+  }
 }
 
 async function persistOrder(ids: string[]) {
@@ -514,8 +577,8 @@ function openFullActivity(id: string) {
       @rename-stage="onRenameStage"
       @delete-stage="onDeleteStage"
       @move-stage="onMoveStage"
-      @column-drag-start="(id: string) => { draggingId = null; overlayDeal = null; draggingColumnId = id; }"
-      @column-drag-end="draggingColumnId = null; dropStageId = null"
+      @column-drag-start="onColumnDragStart"
+      @column-drag-end="onColumnDragEnd"
       @add-stage="onAddStage"
       @load-more="loadMore"
     />
diff --git a/apps/web/src/components/pipeline/DealCard.vue b/apps/web/src/components/pipeline/DealCard.vue
index 556f7c4..0387ac4 100644
--- a/apps/web/src/components/pipeline/DealCard.vue
+++ b/apps/web/src/components/pipeline/DealCard.vue
@@ -105,9 +105,9 @@ const chevronStyle = computed(() => ({
 
 const cardStyle = computed(() => ({
   cursor: props.selectMode ? 'pointer' : 'grab',
-  opacity: props.dragging ? 0.4 : 1,
-  transform: props.dragging ? 'scale(0.98)' : 'none',
-  transition: 'opacity 180ms ease, transform 180ms ease, box-shadow 180ms ease',
+  // تغییر opacity/transform وسط dragstart درگ HTML5 را در کروم لغو می‌کند؛ فقط سایه
+  opacity: props.dragging ? 0.55 : 1,
+  transition: 'opacity 120ms ease, box-shadow 120ms ease',
   margin: 0,
   position: highlighted.value ? 'relative' : undefined,
   zIndex: highlighted.value ? 2 : undefined,
diff --git a/apps/web/src/views/PipelineBoardView.vue b/apps/web/src/views/PipelineBoardView.vue
index 6c55d71..9f10ec5 100644
--- a/apps/web/src/views/PipelineBoardView.vue
+++ b/apps/web/src/views/PipelineBoardView.vue
@@ -108,6 +108,7 @@ const overlayAccent = ref<PipelineStage['color']>('green');
 const overlayPos = ref({ x: 0, y: 0 });
 const menuOpenId = ref<string | null>(null);
 const moving = ref(false);
+let dragSessionId: string | null = null;
 
 const pipelineOptions = computed(() =>
   pipelines.value.map((p) => ({
@@ -245,13 +246,8 @@ function onPointerMove(event: PointerEvent | MouseEvent) {
 
 function onDragStart(deal: PipelineDeal, event: DragEvent) {
   draggingColumnId.value = null;
-  draggingId.value = deal.id;
-  overlayDeal.value = deal;
-  overlayAccent.value = findAccent(deal.id);
-  overlayPos.value = {
-    x: (event.clientX || 0) + 12,
-    y: (event.clientY || 0) + 12,
-  };
+  if (moving.value) moving.value = false;
+  dragSessionId = deal.id;
   event.dataTransfer?.setData('text/plain', deal.id);
   event.dataTransfer!.effectAllowed = 'move';
   if (event.dataTransfer) {
@@ -260,12 +256,25 @@ function onDragStart(deal: PipelineDeal, event: DragEvent) {
       'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
     event.dataTransfer.setDragImage(img, 0, 0);
   }
+  overlayAccent.value = findAccent(deal.id);
+  overlayPos.value = {
+    x: (event.clientX || 0) + 12,
+    y: (event.clientY || 0) + 12,
+  };
+  // DOM را بعد از dragstart عوض کن تا کروم درگ را لغو نکند
+  window.setTimeout(() => {
+    if (dragSessionId !== deal.id) return;
+    draggingId.value = deal.id;
+    overlayDeal.value = deal;
+  }, 0);
 }
 
 function onDragEnd() {
-  const endedId = draggingId.value;
+  const endedId = dragSessionId ?? draggingId.value;
   window.setTimeout(() => {
-    if (draggingId.value !== endedId) return;
+    if (dragSessionId && dragSessionId !== endedId) return;
+    if (draggingId.value && draggingId.value !== endedId) return;
+    dragSessionId = null;
     draggingId.value = null;
     dropStageId.value = null;
     overlayDeal.value = null;
@@ -310,37 +319,44 @@ async function applyUpdateDealStage(
 async function onDrop(stageId: string, event: DragEvent, index?: number) {
   event.preventDefault();
   const transfer = event.dataTransfer?.getData('text/plain') || '';
-  const draggedCardId = draggingId.value;
+  const draggedCardId = dragSessionId || draggingId.value;
   const columnId = draggingColumnId.value;
   dropStageId.value = null;
+  dragSessionId = null;
   draggingId.value = null;
   overlayDeal.value = null;
   draggingColumnId.value = null;
 
-  const isStageDrag = transfer.startsWith('stage:');
-  if (isStageDrag || (!transfer && !draggedCardId && columnId)) {
-    const fromId = isStageDrag ? transfer.slice('stage:'.length) : columnId;
-    if (fromId) await reorderColumn(fromId, stageId);
+  // کارت بر payload ستون اولویت دارد
+  const dealId =
+    draggedCardId || (transfer && !transfer.startsWith('stage:') ? transfer : '');
+  if (dealId) {
+    const current = stages.value.find((stage) => stage.deals.some((deal) => deal.id === dealId));
+    if (current?.id === stageId && index == null) return;
+
+    const next = updateDealStage(stages.value, dealId, stageId, index);
+    const unchanged = next.every((stage, stageIndex) => {
+      const prev = stages.value[stageIndex];
+      return (
+        stage.deals.length === (prev?.deals.length ?? -1) &&
+        stage.deals.every((deal, dealIndex) => deal.id === prev?.deals[dealIndex]?.id)
+      );
+    });
+    if (unchanged) return;
+
+    // اگر جابه‌جایی قبلی هنوز در جریان است، این یکی را صف نکن — فقط رد نکن بی‌صدا با early return قدیمی
+    if (moving.value) {
+      moving.value = false;
+    }
+    await applyUpdateDealStage(dealId, stageId, index);
     return;
   }
 
-  const dealId = (!isStageDrag && transfer) || draggedCardId || '';
-  if (!dealId || moving.value) return;
-
-  const current = stages.value.find((stage) => stage.deals.some((deal) => deal.id === dealId));
-  if (current?.id === stageId && index == null) return;
-
-  const next = updateDealStage(stages.value, dealId, stageId, index);
-  const unchanged = next.every((stage, stageIndex) => {
-    const prev = stages.value[stageIndex];
-    return (
-      stage.deals.length === (prev?.deals.length ?? -1) &&
-      stage.deals.every((deal, dealIndex) => deal.id === prev?.deals[dealIndex]?.id)
-    );
-  });
-  if (unchanged) return;
-
-  await applyUpdateDealStage(dealId, stageId, index);
+  const isStageDrag = transfer.startsWith('stage:');
+  if (isStageDrag || columnId) {
+    const fromId = isStageDrag ? transfer.slice('stage:'.length) : columnId;
+    if (fromId) await reorderColumn(fromId, stageId);
+  }
 }
 
 function apiMessage(e: unknown, fallback: string) {
diff --git a/apps/web/src/views/ProjectBoardView.vue b/apps/web/src/views/ProjectBoardView.vue
index 7589f66..2884688 100644
--- a/apps/web/src/views/ProjectBoardView.vue
+++ b/apps/web/src/views/ProjectBoardView.vue
@@ -56,6 +56,7 @@ const busy = ref(false);
 const importMsg = ref('');
 
 const draggingId = ref<string | null>(null);
+let dragSessionId: string | null = null;
 const draggingColumnId = ref<string | null>(null);
 const dropStageId = ref<string | null>(null);
 const overlayDeal = ref<PipelineDeal | null>(null);
@@ -178,13 +179,8 @@ function onPointerMove(event: PointerEvent | MouseEvent) {
 
 function onDragStart(deal: PipelineDeal, event: DragEvent) {
   draggingColumnId.value = null;
-  draggingId.value = deal.id;
-  overlayDeal.value = deal;
-  overlayAccent.value = findAccent(deal.id);
-  overlayPos.value = {
-    x: (event.clientX || 0) + 12,
-    y: (event.clientY || 0) + 12,
-  };
+  if (moving.value) moving.value = false;
+  dragSessionId = deal.id;
   event.dataTransfer?.setData('text/plain', deal.id);
   event.dataTransfer!.effectAllowed = 'move';
   if (event.dataTransfer) {
@@ -193,12 +189,24 @@ function onDragStart(deal: PipelineDeal, event: DragEvent) {
       'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
     event.dataTransfer.setDragImage(img, 0, 0);
   }
+  overlayAccent.value = findAccent(deal.id);
+  overlayPos.value = {
+    x: (event.clientX || 0) + 12,
+    y: (event.clientY || 0) + 12,
+  };
+  window.setTimeout(() => {
+    if (dragSessionId !== deal.id) return;
+    draggingId.value = deal.id;
+    overlayDeal.value = deal;
+  }, 0);
 }
 
 function onDragEnd() {
-  const endedId = draggingId.value;
+  const endedId = dragSessionId ?? draggingId.value;
   window.setTimeout(() => {
-    if (draggingId.value !== endedId) return;
+    if (dragSessionId && dragSessionId !== endedId) return;
+    if (draggingId.value && draggingId.value !== endedId) return;
+    dragSessionId = null;
     draggingId.value = null;
     dropStageId.value = null;
     overlayDeal.value = null;
@@ -243,30 +251,32 @@ async function applyUpdateCardStage(
 async function onDrop(stageId: string, event: DragEvent, index?: number) {
   event.preventDefault();
   const transfer = event.dataTransfer?.getData('text/plain') || '';
-  const draggedCardId = draggingId.value;
+  const draggedCardId = dragSessionId || draggingId.value;
   const columnId = draggingColumnId.value;
   dropStageId.value = null;
+  dragSessionId = null;
   draggingId.value = null;
   overlayDeal.value = null;
   draggingColumnId.value = null;
 
+  const cardId =
+    draggedCardId || (transfer && !transfer.startsWith('stage:') ? transfer : '');
+  if (cardId) {
+    const current = stages.value.find((s) => s.deals.some((d) => d.id === cardId));
+    const currentIndex = current?.deals.findIndex((d) => d.id === cardId) ?? -1;
+    if (current?.id === stageId && (index == null || index === currentIndex)) {
+      return;
+    }
+    if (moving.value) moving.value = false;
+    await applyUpdateCardStage(cardId, stageId, index);
+    return;
+  }
+
   const isStageDrag = transfer.startsWith('stage:');
-  if (isStageDrag || (!transfer && !draggedCardId && columnId)) {
+  if (isStageDrag || columnId) {
     const fromId = isStageDrag ? transfer.slice('stage:'.length) : columnId;
     if (fromId) await reorderColumn(fromId, stageId);
-    return;
   }
-
-  const cardId = (!isStageDrag && transfer) || draggedCardId || '';
-  if (!cardId || moving.value) return;
-
-  const current = stages.value.find((s) => s.deals.some((d) => d.id === cardId));
-  const currentIndex = current?.deals.findIndex((d) => d.id === cardId) ?? -1;
-  if (current?.id === stageId && (index == null || index === currentIndex)) {
-    return;
-  }
-
-  await applyUpdateCardStage(cardId, stageId, index);
 }
 
 function onAddCard(stageId: string) {