diff --git a/src/web/features/inbox/components/MaterialCard.tsx b/src/web/features/inbox/components/MaterialCard.tsx
index 44310d0..4419913 100644
--- a/src/web/features/inbox/components/MaterialCard.tsx
+++ b/src/web/features/inbox/components/MaterialCard.tsx
@@ -10,6 +10,11 @@ interface MaterialCardProps {
   selected: boolean;
 }
 
+function formatAssociatedDate(date: string): string {
+  if (!date) return "—";
+  return date;
+}
+
 const STATUS_MAP: Record<MaterialStatus, { color: string; label: string }> = {
   approved: { color: "green", label: "已通过" },
   discarded: { color: "red", label: "已放弃" },
@@ -28,7 +33,7 @@ export function MaterialCard({ material, onDelete, onSelect, selected }: Materia
         </Typography.Text>
         <br />
         <Typography.Text className="material-item-time" type="secondary">
-          {formatMaterialTime(material.createdAt)}
+          {formatAssociatedDate(material.associatedDate)}
         </Typography.Text>
       </div>
       <div className="material-item-right">
@@ -61,19 +66,3 @@ export function MaterialCard({ material, onDelete, onSelect, selected }: Materia
     </Flex>
   );
 }
-
-function formatMaterialTime(timestamp: string, now = new Date()): string {
-  const time = new Date(timestamp);
-  const diffMs = now.getTime() - time.getTime();
-  if (diffMs < 60_000) return "刚刚";
-
-  const today = new Date(now.getFullYear(), now.getMonth(), now.getDate());
-  const yesterday = new Date(today.getTime() - 86_400_000);
-  const timeDate = new Date(time.getFullYear(), time.getMonth(), time.getDate());
-
-  if (timeDate.getTime() >= today.getTime()) return "今天";
-  if (timeDate.getTime() >= yesterday.getTime()) return "昨天";
-  const mm = String(time.getMonth() + 1).padStart(2, "0");
-  const dd = String(time.getDate()).padStart(2, "0");
-  return `${time.getFullYear()}-${mm}-${dd}`;
-}
diff --git a/src/web/features/inbox/components/MaterialGroup.tsx b/src/web/features/inbox/components/MaterialGroup.tsx
new file mode 100644
index 0000000..8753640
--- /dev/null
+++ b/src/web/features/inbox/components/MaterialGroup.tsx
@@ -0,0 +1,39 @@
+import { CaretDownOutlined, CaretRightOutlined } from "@ant-design/icons";
+import { Typography } from "antd";
+import { type ReactNode, useState } from "react";
+
+interface MaterialGroupProps {
+  children: ReactNode;
+  count: number;
+  emptyText?: string;
+  label: string;
+}
+
+export function MaterialGroup({ children, count, emptyText, label }: MaterialGroupProps) {
+  const [collapsed, setCollapsed] = useState(false);
+
+  return (
+    <div className="app-inbox-group">
+      <div className="app-inbox-group-header" onClick={() => setCollapsed(!collapsed)}>
+        <span className="app-inbox-group-arrow">{collapsed ? <CaretRightOutlined /> : <CaretDownOutlined />}</span>
+        <Typography.Text className="app-inbox-group-label" type="secondary">
+          {label}
+        </Typography.Text>
+        <Typography.Text className="app-inbox-group-count" type="secondary">
+          ({count})
+        </Typography.Text>
+      </div>
+      {!collapsed && (
+        <div className="app-inbox-group-content">
+          {count === 0 && emptyText ? (
+            <Typography.Text className="app-inbox-group-empty" type="secondary">
+              {emptyText}
+            </Typography.Text>
+          ) : (
+            children
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/src/web/features/inbox/components/MaterialList.tsx b/src/web/features/inbox/components/MaterialList.tsx
index 4ce36ed..e9a668d 100644
--- a/src/web/features/inbox/components/MaterialList.tsx
+++ b/src/web/features/inbox/components/MaterialList.tsx
@@ -1,9 +1,19 @@
-import { PlusOutlined } from "@ant-design/icons";
-import { Button, Empty, Spin } from "antd";
+import {
+  AppstoreOutlined,
+  CheckCircleOutlined,
+  ClockCircleOutlined,
+  CloseCircleOutlined,
+  PlusOutlined,
+} from "@ant-design/icons";
+import { Button, Empty, Segmented, Skeleton } from "antd";
+import { useMemo, useState } from "react";
 
 import type { Material } from "../types";
 
 import { MaterialCard } from "./MaterialCard";
+import { MaterialGroup } from "./MaterialGroup";
+
+type DateGroup = "earlier" | "thisMonth" | "thisWeek" | "today" | "yesterday";
 
 interface MaterialListProps {
   loading: boolean;
@@ -14,29 +24,132 @@ interface MaterialListProps {
   selectedId: null | string;
 }
 
+const GROUP_LABELS: Record<DateGroup, string> = {
+  earlier: "更早",
+  thisMonth: "本月",
+  thisWeek: "本周",
+  today: "今天",
+  yesterday: "昨天",
+};
+
+const GROUP_ORDER: readonly DateGroup[] = ["today", "yesterday", "thisWeek", "thisMonth", "earlier"];
+
+interface MaterialGroupData {
+  items: Material[];
+  key: DateGroup;
+}
+
+function getDateGroup(dateStr: string, now: Date): DateGroup {
+  const date = new Date(dateStr);
+  const today = new Date(now.getFullYear(), now.getMonth(), now.getDate());
+  const yesterday = new Date(today.getTime() - 86_400_000);
+  const dateDay = new Date(date.getFullYear(), date.getMonth(), date.getDate());
+
+  if (dateDay.getTime() >= today.getTime()) return "today";
+  if (dateDay.getTime() >= yesterday.getTime()) return "yesterday";
+
+  const dayOfWeek = today.getDay();
+  const mondayOffset = dayOfWeek === 0 ? 6 : dayOfWeek - 1;
+  const monday = new Date(today.getTime() - mondayOffset * 86_400_000);
+  if (dateDay.getTime() >= monday.getTime()) return "thisWeek";
+
+  if (dateDay.getFullYear() === today.getFullYear() && dateDay.getMonth() === today.getMonth()) {
+    return "thisMonth";
+  }
+
+  return "earlier";
+}
+
+function groupMaterialsByDate(materials: readonly Material[]): MaterialGroupData[] {
+  const now = new Date();
+  const groups = new Map<DateGroup, Material[]>();
+
+  for (const m of materials) {
+    const group = getDateGroup(m.createdAt, now);
+    if (!groups.has(group)) groups.set(group, []);
+    groups.get(group)!.push(m);
+  }
+
+  return GROUP_ORDER.map((key) => ({ items: groups.get(key) ?? [], key }));
+}
+
+const STATUS_FILTER_OPTIONS = [
+  { icon: <AppstoreOutlined />, label: "全部", value: "all" },
+  { color: "#faad14", icon: <ClockCircleOutlined />, label: "待审核", value: "pending" },
+  { color: "#52c41a", icon: <CheckCircleOutlined />, label: "已通过", value: "approved" },
+  { color: "#ff4d4f", icon: <CloseCircleOutlined />, label: "已放弃", value: "discarded" },
+] as const;
+
+type FilterValue = (typeof STATUS_FILTER_OPTIONS)[number]["value"];
+
 export function MaterialList({ loading, materials, onAddClick, onDelete, onSelect, selectedId }: MaterialListProps) {
+  const [filterStatus, setFilterStatus] = useState<FilterValue>("all");
+
+  const filteredMaterials = useMemo(() => {
+    if (filterStatus === "all") return materials;
+    return materials.filter((m) => m.status === filterStatus);
+  }, [materials, filterStatus]);
+
+  const groupedMaterials = useMemo(() => groupMaterialsByDate(filteredMaterials), [filteredMaterials]);
+
+  const segmentedOptions = useMemo(
+    () =>
+      STATUS_FILTER_OPTIONS.map((opt) => ({
+        label: (
+          <span>
+            {"color" in opt && opt.color ? <span style={{ color: opt.color }}>{opt.icon}</span> : opt.icon}
+            <span className="app-inbox-filter-count">{getStatusCount(materials, opt.value)}</span>
+          </span>
+        ),
+        value: opt.value,
+      })),
+    [materials],
+  );
+
+  const showAllGroups = filterStatus === "all";
+
   return (
     <div className="app-inbox-sidebar">
       <Button block icon={<PlusOutlined />} onClick={onAddClick} type="primary">
         新增素材
       </Button>
+      <Segmented block onChange={(value) => setFilterStatus(value)} options={segmentedOptions} value={filterStatus} />
       <div className="app-inbox-list">
         {loading ? (
-          <Spin />
+          <Skeleton active paragraph={{ rows: 6 }} title={false} />
         ) : materials.length === 0 ? (
           <Empty description="暂无素材" image={Empty.PRESENTED_IMAGE_SIMPLE} />
+        ) : filteredMaterials.length === 0 ? (
+          <Empty description="当前筛选条件下无素材" image={Empty.PRESENTED_IMAGE_SIMPLE} />
         ) : (
-          materials.map((material) => (
-            <MaterialCard
-              key={material.id}
-              material={material}
-              onDelete={() => onDelete(material.id)}
-              onSelect={() => onSelect(material.id)}
-              selected={material.id === selectedId}
-            />
-          ))
+          groupedMaterials.map((group) => {
+            if (!showAllGroups && group.items.length === 0) return null;
+            return (
+              <MaterialGroup
+                count={group.items.length}
+                emptyText="暂无"
+                key={group.key}
+                label={GROUP_LABELS[group.key]}
+              >
+                {group.items.map((material) => (
+                  <MaterialCard
+                    key={material.id}
+                    material={material}
+                    onDelete={() => onDelete(material.id)}
+                    onSelect={() => onSelect(material.id)}
+                    selected={material.id === selectedId}
+                  />
+                ))}
+              </MaterialGroup>
+            );
+          })
         )}
       </div>
     </div>
   );
 }
+
+function getStatusCount(materials: readonly Material[], status: string): number {
+  if (status === "all") return materials.length;
+  return materials.filter((m) => m.status === status).length;
+}
diff --git a/src/web/features/inbox/components/MaterialSidebar.tsx b/src/web/features/inbox/components/MaterialSidebar.tsx
index 72f76fe..4296b60 100644
--- a/src/web/features/inbox/components/MaterialSidebar.tsx
+++ b/src/web/features/inbox/components/MaterialSidebar.tsx
@@ -12,7 +12,7 @@ interface MaterialSidebarProps {
 }
 
 export function MaterialSidebar({ onAddClick, onDelete, onSelect, projectId, selectedId }: MaterialSidebarProps) {
-  const { data, error, isLoading, refetch } = useMaterialList(projectId);
+  const { data, error, isLoading, refetch } = useMaterialList(projectId, { pageSize: 200 });
   const deleteMutation = useDeleteMaterial(projectId);
 
   const handleDelete = (id: string) => {
diff --git a/src/web/styles.css b/src/web/styles.css
index 21db406..9b7014f 100644
--- a/src/web/styles.css
+++ b/src/web/styles.css
@@ -308,7 +308,7 @@ body {
 .material-list-item {
   border-left: 3px solid transparent;
   border-bottom: 1px solid var(--ant-color-border-secondary);
-  padding: var(--ant-padding-xs) 0;
+  padding: var(--ant-padding-xs) var(--ant-padding-sm);
   padding-left: var(--ant-padding-sm);
   cursor: pointer;
   transition: border-color 0.15s ease, background 0.15s ease;
@@ -365,3 +365,54 @@ body {
 .material-item-time {
   font-size: var(--ant-font-size-sm);
 }
+
+.app-inbox-group {
+  margin-top: var(--ant-margin-xs);
+}
+
+.app-inbox-group-header {
+  display: flex;
+  align-items: center;
+  gap: var(--ant-margin-xxs);
+  padding: var(--ant-padding-xs) var(--ant-padding-xs);
+  cursor: pointer;
+  user-select: none;
+  border-radius: var(--ant-border-radius-sm);
+  transition: background 0.15s ease;
+}
+
+.app-inbox-group-header:hover {
+  background: var(--ant-color-fill-tertiary);
+}
+
+.app-inbox-group-arrow {
+  display: inline-flex;
+  align-items: center;
+  font-size: var(--ant-font-size-sm);
+  color: var(--ant-color-text-quaternary);
+  width: 14px;
+}
+
+.app-inbox-group-label {
+  font-size: var(--ant-font-size-sm);
+  font-weight: 500;
+}
+
+.app-inbox-group-count {
+  font-size: var(--ant-font-size-sm);
+}
+
+.app-inbox-group-content {
+  padding-bottom: var(--ant-padding-xs);
+}
+
+.app-inbox-group-empty {
+  display: block;
+  padding: var(--ant-padding-xs) var(--ant-padding);
+  font-size: var(--ant-font-size-sm);
+}
+
+.app-inbox-filter-count {
+  margin-left: 4px;
+  font-size: var(--ant-font-size-sm);
+}