diff --git a/src/components/dashboard/platform/AllPlatformTrafficChart.tsx b/src/components/dashboard/platform/AllPlatformTrafficChart.tsx
index 82a3dd7e..65c6798b 100644
--- a/src/components/dashboard/platform/AllPlatformTrafficChart.tsx
+++ b/src/components/dashboard/platform/AllPlatformTrafficChart.tsx
@@ -19,6 +19,10 @@ import { useClickStream } from "@/hooks/dashboard/useClickStream";
 
 import Button from "@/components/common/button/Button";
 import { Skeleton } from "@/components/common/skeleton/Skeleton";
+import {
+  PLATFORM_ALL_TRAFFIC_CHART_ID,
+  PLATFORM_ALL_TRAFFIC_CONTAINER_ID,
+} from "@/components/dashboard/platform/platformTrafficChartDownload.config";
 
 const STREAM_MODE = "dummy" as const;
 
@@ -93,6 +97,7 @@ const AllPlatformTrafficChart = memo(function AllPlatformTrafficChart() {
 
   const chartOptions: ApexOptions = {
     chart: {
+      id: PLATFORM_ALL_TRAFFIC_CHART_ID,
       type: "area",
       toolbar: { show: false },
       zoom: { enabled: false },
@@ -211,7 +216,7 @@ const AllPlatformTrafficChart = memo(function AllPlatformTrafficChart() {
           </Button>
         </div>
       )}
-      <div className="min-h-0 flex-1">
+      <div id={PLATFORM_ALL_TRAFFIC_CONTAINER_ID} className="min-h-0 flex-1">
         <ReactApexChart
           options={chartOptions}
           series={seriesData}
diff --git a/src/components/dashboard/platform/AllPlatformView.tsx b/src/components/dashboard/platform/AllPlatformView.tsx
index 1a8aae1e..bc9a6ba5 100644
--- a/src/components/dashboard/platform/AllPlatformView.tsx
+++ b/src/components/dashboard/platform/AllPlatformView.tsx
@@ -1,3 +1,6 @@
+import type { ReactNode } from "react";
+
+import type { TProviderType } from "@/types/dashboard/provider";
 import {
   PLATFORM_CHART_COLORS,
   PLATFORM_MAP,
@@ -19,6 +22,7 @@ import AdStatusChart from "@/components/dashboard/charts/AdStatusChart";
 import PerformanceEfficiencyChart from "@/components/dashboard/charts/PerformanceEfficiencyChart";
 import AllPlatformTrafficChart from "@/components/dashboard/platform/AllPlatformTrafficChart";
 import PlatformDetailCard from "@/components/dashboard/platform/PlatformDetailCard";
+import PlatformTrafficChartDownload from "@/components/dashboard/platform/PlatformTrafficChartDownload";
 import {
   AdStatusChartSkeleton,
   BadgeSkeleton,
@@ -28,11 +32,37 @@ import {
 } from "@/components/dashboard/platform/skeleton/PlatformSkeleton";
 import TopPerformanceList from "@/components/dashboard/platform/TopPerformanceList";
 
+import GoogleLogo from "@/assets/logo/social-logo/circle/google-circle.svg?react";
+import MetaLogo from "@/assets/logo/social-logo/circle/meta-circle.svg?react";
+import NaverLogo from "@/assets/logo/social-logo/circle/naver-circle.svg?react";
+
 const platformChartLegendItems = PROVIDER_TYPES.map((provider) => ({
   label: PLATFORM_MAP[provider],
   color: PLATFORM_CHART_COLORS[provider],
 }));
 
+const PLATFORM_LOGOS: Record<TProviderType, ReactNode> = {
+  GOOGLE: <GoogleLogo className="w-10 h-8" />,
+  NAVER: <NaverLogo className="w-10 h-8" />,
+  META: <MetaLogo className="w-10 h-8" />,
+};
+
+function PlatformDetailErrorCard({ provider }: { provider: TProviderType }) {
+  return (
+    <Card className="min-w-0 flex-1 p-7">
+      <div className="mb-8 flex items-center gap-2">
+        <div className="shrink-0">{PLATFORM_LOGOS[provider]}</div>
+        <h3 className="truncate font-heading4 text-text-title">
+          {PLATFORM_MAP[provider]}
+        </h3>
+      </div>
+      <div className="flex min-h-40 items-center justify-center font-body2 text-text-sub">
+        데이터를 불러오지 못했습니다.
+      </div>
+    </Card>
+  );
+}
+
 export default function AllPlatformView() {
   const {
     data: roasRankings,
@@ -47,11 +77,15 @@ export default function AllPlatformView() {
   } = usePlatformAdCount();
 
   const {
-    data: platformPerformance,
+    data: performanceData,
     isLoading: isPerformanceLoading,
     isError: isPerformanceError,
   } = usePlatformPerformance();
 
+  const platformPerformance = performanceData?.platforms;
+  const failedProviders = performanceData?.failedProviders ?? [];
+  const hasPartialFailure = failedProviders.length > 0;
+
   return (
     <div className="flex flex-col gap-8">
       <div className="grid grid-cols-3 tablet:grid-cols-1 gap-6">
@@ -154,7 +188,14 @@ export default function AllPlatformView() {
                 표시할 성과 데이터가 없습니다.
               </div>
             ) : (
-              <PerformanceEfficiencyChart data={platformPerformance} />
+              <div className="flex min-h-0 flex-1 flex-col">
+                {hasPartialFailure ? (
+                  <p className="mb-2 font-caption text-text-muted">
+                    일부 플랫폼 성과를 불러오지 못했습니다.
+                  </p>
+                ) : null}
+                <PerformanceEfficiencyChart data={platformPerformance} />
+              </div>
             )}
           </ErrorBoundary>
         </Card>
@@ -165,6 +206,7 @@ export default function AllPlatformView() {
         title="플랫폼별 실시간 클릭수 비교"
         className="h-120 flex flex-col"
         description={<ChartLegend items={platformChartLegendItems} />}
+        RightElement={<PlatformTrafficChartDownload />}
       >
         <div className="flex-1 min-h-0">
           <ErrorBoundary FallbackComponent={ChartErrorFallback}>
@@ -176,7 +218,7 @@ export default function AllPlatformView() {
       {/* 개별 플랫폼 상세 */}
       <ErrorBoundary
         FallbackComponent={ChartErrorFallback}
-        resetKeys={[platformPerformance]}
+        resetKeys={[platformPerformance, failedProviders]}
       >
         <div className="grid grid-cols-3 tablet:grid-cols-1 gap-6">
           {isPerformanceLoading ? (
@@ -187,14 +229,21 @@ export default function AllPlatformView() {
             <div className="col-span-3 tablet:col-span-1 flex items-center justify-center font-body2 text-text-sub py-16">
               데이터를 불러오지 못했습니다.
             </div>
-          ) : platformPerformance.length === 0 ? (
-            <div className="col-span-3 tablet:col-span-1 flex items-center justify-center font-body2 text-text-sub py-16">
-              표시할 플랫폼 데이터가 없습니다.
-            </div>
           ) : (
-            platformPerformance.map((platform) => (
-              <PlatformDetailCard key={platform.provider} data={platform} />
-            ))
+            PROVIDER_TYPES.map((provider) => {
+              const data = platformPerformance.find(
+                (platform) => platform.provider === provider,
+              );
+              if (data) {
+                return <PlatformDetailCard key={provider} data={data} />;
+              }
+              if (failedProviders.includes(provider)) {
+                return (
+                  <PlatformDetailErrorCard key={provider} provider={provider} />
+                );
+              }
+              return null;
+            })
           )}
         </div>
       </ErrorBoundary>
diff --git a/src/components/dashboard/platform/PlatformTrafficChart.tsx b/src/components/dashboard/platform/PlatformTrafficChart.tsx
index 87999ea4..244b920c 100644
--- a/src/components/dashboard/platform/PlatformTrafficChart.tsx
+++ b/src/components/dashboard/platform/PlatformTrafficChart.tsx
@@ -31,6 +31,10 @@ import { parseMinuteToTimestamp } from "@/utils/dashboard/parseMinuteToTimestamp
 import Button from "@/components/common/button/Button";
 import { Skeleton } from "@/components/common/skeleton/Skeleton";
 import { useAnomalyMarkerPos } from "@/components/dashboard/charts/useAnomalyMarkerPos";
+import {
+  PLATFORM_TRAFFIC_CHART_ID,
+  PLATFORM_TRAFFIC_CONTAINER_ID,
+} from "@/components/dashboard/platform/platformTrafficChartDownload.config";
 
 interface IPlatformTrafficChartProps {
   data: IClickStreamItem | null;
@@ -175,6 +179,7 @@ const PlatformTrafficChart = memo(function PlatformTrafficChart({
 
   const chartOptions: ApexOptions = {
     chart: {
+      id: PLATFORM_TRAFFIC_CHART_ID,
       type: "area",
       toolbar: { show: false },
       zoom: { enabled: false },
@@ -428,6 +433,7 @@ const PlatformTrafficChart = memo(function PlatformTrafficChart({
           ) : (
             <div
               ref={containerRef}
+              id={PLATFORM_TRAFFIC_CONTAINER_ID}
               role="group"
               aria-label={CHART_ARIA_LABEL}
               data-hide-tooltip={showBubble || undefined}
@@ -446,6 +452,7 @@ const PlatformTrafficChart = memo(function PlatformTrafficChart({
       ) : (
         <div
           ref={containerRef}
+          id={PLATFORM_TRAFFIC_CONTAINER_ID}
           role="group"
           aria-label={CHART_ARIA_LABEL}
           data-hide-tooltip={showBubble || undefined}
diff --git a/src/components/dashboard/platform/PlatformTrafficChartDownload.tsx b/src/components/dashboard/platform/PlatformTrafficChartDownload.tsx
new file mode 100644
index 00000000..bce655d3
--- /dev/null
+++ b/src/components/dashboard/platform/PlatformTrafficChartDownload.tsx
@@ -0,0 +1,52 @@
+import { DropdownMenu } from "@/components/common/dropdownmenu/DropdownMenu";
+import {
+  getPlatformAllTrafficFilename,
+  getPlatformTrafficFilename,
+  getTrafficChartDownloadItems,
+  PLATFORM_ALL_TRAFFIC_CHART_ID,
+  PLATFORM_ALL_TRAFFIC_CONTAINER_ID,
+  PLATFORM_TRAFFIC_CHART_ID,
+  PLATFORM_TRAFFIC_CONTAINER_ID,
+} from "@/components/dashboard/platform/platformTrafficChartDownload.config";
+
+import MoreIcon from "@/assets/icon/common/more.svg?react";
+
+type TPlatformTrafficChartDownloadProps = {
+  /** 개별 보기: 플랫폼 코드 (GOOGLE 등). 없으면 전체보기 */
+  platform?: string;
+};
+
+export default function PlatformTrafficChartDownload({
+  platform,
+}: TPlatformTrafficChartDownloadProps) {
+  const chartId = platform
+    ? PLATFORM_TRAFFIC_CHART_ID
+    : PLATFORM_ALL_TRAFFIC_CHART_ID;
+  const containerId = platform
+    ? PLATFORM_TRAFFIC_CONTAINER_ID
+    : PLATFORM_ALL_TRAFFIC_CONTAINER_ID;
+  const filename = platform
+    ? getPlatformTrafficFilename(platform)
+    : getPlatformAllTrafficFilename();
+
+  return (
+    <DropdownMenu
+      aria-label="차트 다운로드"
+      trigger={
+        <button
+          type="button"
+          className="flex h-8 w-8 items-center justify-center rounded hover:bg-surface-200 transition-ui-fast"
+          aria-label="다운로드 메뉴 열기"
+        >
+          <MoreIcon
+            width={16}
+            height={16}
+            aria-hidden="true"
+            className="text-text-auth-sub"
+          />
+        </button>
+      }
+      items={getTrafficChartDownloadItems(chartId, containerId, filename)}
+    />
+  );
+}
diff --git a/src/components/dashboard/platform/PlatformViewSwitcher.tsx b/src/components/dashboard/platform/PlatformViewSwitcher.tsx
index ffa9584d..6d49c8cf 100644
--- a/src/components/dashboard/platform/PlatformViewSwitcher.tsx
+++ b/src/components/dashboard/platform/PlatformViewSwitcher.tsx
@@ -17,6 +17,7 @@ interface IPlatformViewSwitcherProps {
   onSelectAll: () => void;
   layout?: "header" | "mobile";
   className?: string;
+  isPlatformSelectDisabled?: boolean;
 }
 
 export default function PlatformViewSwitcher({
@@ -26,9 +27,19 @@ export default function PlatformViewSwitcher({
   onSelectAll,
   layout = "header",
   className,
+  isPlatformSelectDisabled = false,
 }: IPlatformViewSwitcherProps) {
   const isMobileLayout = layout === "mobile";
 
+  const platformTriggerClassName = twMerge(
+    "flex h-12 items-center rounded-2xl",
+    isMobileLayout ? "w-full min-w-0" : "w-34 shrink-0",
+    isAllView &&
+      "border border-surface-400 bg-surface-100 text-text-muted hover:bg-surface-200",
+    isPlatformSelectDisabled &&
+      "cursor-not-allowed border border-surface-400 bg-surface-200 text-text-muted hover:bg-surface-200",
+  );
+
   return (
     <div
       className={twMerge(
@@ -53,39 +64,51 @@ export default function PlatformViewSwitcher({
         전체보기
       </Button>
       <div className={isMobileLayout ? "min-w-0" : undefined}>
-        <DropdownMenu
-          fullWidth={isMobileLayout}
-          menuClassName={twMerge("w-34", isMobileLayout && "w-full")}
-          trigger={
-            <Button
-              type="button"
-              size="small"
-              variant={!isAllView ? "primary" : "custom"}
-              className={twMerge(
-                "flex h-12 items-center rounded-2xl",
-                isMobileLayout ? "w-full min-w-0" : "w-34 shrink-0",
-                isAllView &&
-                  "border border-surface-400 bg-surface-100 text-text-muted hover:bg-surface-200",
-              )}
-            >
-              <span
-                className={twMerge(
-                  "truncate font-body1",
-                  isAllView ? "text-text-muted" : "text-surface-100",
-                )}
+        {isPlatformSelectDisabled ? (
+          <Button
+            type="button"
+            size="small"
+            variant="custom"
+            disabled
+            aria-disabled="true"
+            className={platformTriggerClassName}
+          >
+            <span className="truncate font-body1 text-text-muted">
+              {selectedPlatformLabel}
+            </span>
+            <ChevronDownIcon className="ml-2 h-3 w-3 shrink-0 rotate-180 text-text-muted" />
+          </Button>
+        ) : (
+          <DropdownMenu
+            fullWidth={isMobileLayout}
+            menuClassName={twMerge("w-34", isMobileLayout && "w-full")}
+            aria-label="플랫폼 선택"
+            trigger={
+              <Button
+                type="button"
+                size="small"
+                variant={!isAllView ? "primary" : "custom"}
+                className={platformTriggerClassName}
               >
-                {selectedPlatformLabel}
-              </span>
-              <ChevronDownIcon
-                className={twMerge(
-                  "ml-2 h-3 w-3 shrink-0 rotate-180 transition-transform",
-                  isAllView ? "text-text-muted" : "text-surface-100",
-                )}
-              />
-            </Button>
-          }
-          items={platformItems}
-        />
+                <span
+                  className={twMerge(
+                    "truncate font-body1",
+                    isAllView ? "text-text-muted" : "text-surface-100",
+                  )}
+                >
+                  {selectedPlatformLabel}
+                </span>
+                <ChevronDownIcon
+                  className={twMerge(
+                    "ml-2 h-3 w-3 shrink-0 rotate-180 transition-transform",
+                    isAllView ? "text-text-muted" : "text-surface-100",
+                  )}
+                />
+              </Button>
+            }
+            items={platformItems}
+          />
+        )}
       </div>
     </div>
   );
diff --git a/src/components/dashboard/platform/SinglePlatformView.tsx b/src/components/dashboard/platform/SinglePlatformView.tsx
index d2454089..1088c1d4 100644
--- a/src/components/dashboard/platform/SinglePlatformView.tsx
+++ b/src/components/dashboard/platform/SinglePlatformView.tsx
@@ -25,6 +25,7 @@ import DashboardAiSummarySection from "@/components/dashboard/ai-report/componen
 import BudgetGaugeChart from "@/components/dashboard/charts/BudgetGaugeChart";
 import PlatformDetailTable from "@/components/dashboard/platform/PlatformDetailTable";
 import PlatformTrafficChart from "@/components/dashboard/platform/PlatformTrafficChart";
+import PlatformTrafficChartDownload from "@/components/dashboard/platform/PlatformTrafficChartDownload";
 import {
   PlatformDualBudgetGaugeSkeleton,
   PlatformSingleBudgetGaugeSkeleton,
@@ -163,6 +164,7 @@ export default function SinglePlatformView({
               ]}
             />
           }
+          RightElement={<PlatformTrafficChartDownload platform={platform} />}
         >
           <div
             className={twMerge(
diff --git a/src/components/dashboard/platform/platformTrafficChartDownload.config.ts b/src/components/dashboard/platform/platformTrafficChartDownload.config.ts
new file mode 100644
index 00000000..17867534
--- /dev/null
+++ b/src/components/dashboard/platform/platformTrafficChartDownload.config.ts
@@ -0,0 +1,47 @@
+import {
+  downloadChartCsv,
+  downloadChartPng,
+  downloadChartSvg,
+} from "@/utils/dashboard/downloadChart";
+
+/** 개별 플랫폼 실시간 트래픽 */
+export const PLATFORM_TRAFFIC_CHART_ID = "platform-traffic-chart";
+export const PLATFORM_TRAFFIC_CONTAINER_ID = `${PLATFORM_TRAFFIC_CHART_ID}-container`;
+
+/** 전체보기 실시간 클릭수 비교 */
+export const PLATFORM_ALL_TRAFFIC_CHART_ID = "platform-all-traffic-chart";
+export const PLATFORM_ALL_TRAFFIC_CONTAINER_ID = `${PLATFORM_ALL_TRAFFIC_CHART_ID}-container`;
+
+function todayStamp() {
+  return new Date().toISOString().slice(0, 10);
+}
+
+/** DropdownMenu items — 통합 DOWNLOAD_ITEMS와 동일 역할 */
+export function getTrafficChartDownloadItems(
+  chartId: string,
+  containerId: string,
+  filename: string,
+) {
+  return [
+    {
+      label: "PNG 저장",
+      onClick: () => downloadChartPng(chartId, filename),
+    },
+    {
+      label: "SVG 저장",
+      onClick: () => downloadChartSvg(containerId, filename),
+    },
+    {
+      label: "CSV 다운로드",
+      onClick: () => downloadChartCsv(chartId),
+    },
+  ];
+}
+
+export function getPlatformTrafficFilename(platform: string) {
+  return `platform-traffic-${platform}-${todayStamp()}`;
+}
+
+export function getPlatformAllTrafficFilename() {
+  return `platform-all-traffic-${todayStamp()}`;
+}
diff --git a/src/components/sidebar/WorkspaceSwitcher.tsx b/src/components/sidebar/WorkspaceSwitcher.tsx
index f8cc8ce3..a3d0b489 100644
--- a/src/components/sidebar/WorkspaceSwitcher.tsx
+++ b/src/components/sidebar/WorkspaceSwitcher.tsx
@@ -282,7 +282,12 @@ export function WorkspaceSwitcher({
               ))}
             </div>
 
-            <div className="mt-1 pt-1 border-t border-surface-300">
+            <div
+              className={twMerge(
+                "mt-1 pt-1",
+                otherWorkspaces.length > 0 && "border-t border-surface-300",
+              )}
+            >
               <button
                 type="button"
                 onClick={() => {
diff --git a/src/hooks/dashboard/usePlatformPerformance.ts b/src/hooks/dashboard/usePlatformPerformance.ts
index cd9f4e9f..8dbf7776 100644
--- a/src/hooks/dashboard/usePlatformPerformance.ts
+++ b/src/hooks/dashboard/usePlatformPerformance.ts
@@ -1,4 +1,7 @@
-import type { IPlatformPerformance } from "@/types/dashboard/platform";
+import type {
+  IPlatformPerformance,
+  IPlatformPerformanceQueryData,
+} from "@/types/dashboard/platform";
 import { PROVIDER_TYPES, type TProviderType } from "@/types/dashboard/provider";
 
 import { fetchPlatformMetrics } from "@/utils/dashboard/platformMetricsQuery";
@@ -10,13 +13,13 @@ import useWorkspaceStore from "@/store/useWorkspaceStore";
 
 const PROVIDERS: readonly TProviderType[] = PROVIDER_TYPES;
 
-// 플랫폼별 성과 효율 (3개 플랫폼 병렬 조회 후 병합)
+// 플랫폼별 성과 효율 (3개 플랫폼 병렬 조회 후 병합 — 부분 실패 허용)
 export function usePlatformPerformance() {
   const orgId = useWorkspaceStore((s) => s.selectedOrgId);
 
   return useCoreQuery(
     QUERY_KEYS.platform.performance(orgId),
-    async (): Promise<IPlatformPerformance[]> => {
+    async (): Promise<IPlatformPerformanceQueryData> => {
       const settled = await Promise.allSettled(
         PROVIDERS.map((provider) =>
           fetchPlatformMetrics(orgId!, provider).then((metrics) => ({
@@ -26,17 +29,23 @@ export function usePlatformPerformance() {
         ),
       );
 
-      const success = settled
-        .filter(
-          (r): r is PromiseFulfilledResult<IPlatformPerformance> =>
-            r.status === "fulfilled",
-        )
-        .map((r) => r.value);
+      const platforms: IPlatformPerformance[] = [];
+      const failedProviders: TProviderType[] = [];
 
-      if (success.length !== PROVIDERS.length) {
-        throw new Error("일부 플랫폼 성과 데이터를 불러오지 못했습니다.");
+      settled.forEach((result, index) => {
+        const provider = PROVIDERS[index];
+        if (result.status === "fulfilled") {
+          platforms.push(result.value);
+        } else {
+          failedProviders.push(provider);
+        }
+      });
+
+      if (platforms.length === 0) {
+        throw new Error("플랫폼 성과 데이터를 불러오지 못했습니다.");
       }
-      return success;
+
+      return { platforms, failedProviders };
     },
     { enabled: !!orgId },
   );
diff --git a/src/pages/dashboard/platform/PlatformDashboard.tsx b/src/pages/dashboard/platform/PlatformDashboard.tsx
index 02098047..499aee70 100644
--- a/src/pages/dashboard/platform/PlatformDashboard.tsx
+++ b/src/pages/dashboard/platform/PlatformDashboard.tsx
@@ -1,8 +1,18 @@
-import { type ReactNode, useEffect, useMemo, useState } from "react";
-import { useOutletContext } from "react-router-dom";
+import { type ReactNode, useCallback, useEffect, useMemo } from "react";
+import {
+  useLocation,
+  useNavigate,
+  useOutletContext,
+  useSearchParams,
+} from "react-router-dom";
 
 import type { TProviderType } from "@/types/dashboard/overview";
 import { PLATFORM_MAP, PROVIDER_TYPES } from "@/types/dashboard/provider";
+import type { IPlatformConnectionItem } from "@/types/integration/platformConnection";
+
+import { isTokenExpired } from "@/utils/integration/mapPlatformAccounts";
+
+import { usePlatformConnections } from "@/hooks/integration/usePlatformConnections";
 
 import AllPlatformView from "@/components/dashboard/platform/AllPlatformView";
 import PlatformViewSwitcher from "@/components/dashboard/platform/PlatformViewSwitcher";
@@ -14,22 +24,109 @@ type TDashboardHeaderContext = {
   setHeaderRight?: (node: ReactNode | null) => void;
 };
 
+function parseProviderParam(value: string | null): TPlatformView {
+  if (value != null && (PROVIDER_TYPES as readonly string[]).includes(value)) {
+    return value as TProviderType;
+  }
+  return "전체";
+}
+
+/** 드롭다운·개별 뷰: connected 이고 토큰 미만료일 때만 */
+function isUsableConnectedPlatform(connection: IPlatformConnectionItem) {
+  if (connection.status !== "connected") return false;
+  if (isTokenExpired(connection.tokenExpireAt)) return false;
+  return true;
+}
+
 export default function PlatformDashboard() {
-  const [selectedPlatform, setSelectedPlatform] =
-    useState<TPlatformView>("전체");
+  const [searchParams, setSearchParams] = useSearchParams();
+  const navigate = useNavigate();
+  const location = useLocation();
   const { setHeaderRight } = useOutletContext<TDashboardHeaderContext>();
 
+  const providerFromUrl = parseProviderParam(searchParams.get("provider"));
+
+  const { data: connections } = usePlatformConnections();
+  /** 성공으로 목록이 온 뒤에만 URL provider 검증 (isFetched는 실패도 true) */
+  const hasConnectionData = connections !== undefined;
+
+  const connectedProviders = useMemo(() => {
+    const connected = new Set(
+      (connections ?? [])
+        .filter(isUsableConnectedPlatform)
+        .map((c) => c.provider),
+    );
+    return PROVIDER_TYPES.filter((provider) => connected.has(provider));
+  }, [connections]);
+
+  /**
+   * 연결 목록 성공 후 URL provider가 사용 불가면 화면은 전체보기.
+   * (주소 정리는 navigate로 별도 처리 — setSearchParams delete만으로는 안 지워지는 경우 대비)
+   */
+  const selectedPlatform: TPlatformView = !hasConnectionData
+    ? providerFromUrl
+    : providerFromUrl !== "전체" && connectedProviders.includes(providerFromUrl)
+      ? providerFromUrl
+      : "전체";
+
   const isAllView = selectedPlatform === "전체";
 
+  const clearProviderQuery = useCallback(() => {
+    if (!searchParams.has("provider")) return;
+
+    const nextParams = new URLSearchParams(searchParams);
+    nextParams.delete("provider");
+    const search = nextParams.toString();
+
+    navigate(
+      {
+        pathname: location.pathname,
+        search: search ? `?${search}` : "",
+      },
+      { replace: true },
+    );
+  }, [searchParams, navigate, location.pathname]);
+
+  const setSelectedPlatform = useCallback(
+    (next: TPlatformView) => {
+      if (next === "전체") {
+        clearProviderQuery();
+        return;
+      }
+
+      setSearchParams(
+        (prev) => {
+          const nextParams = new URLSearchParams(prev);
+          nextParams.set("provider", next);
+          return nextParams;
+        },
+        { replace: true },
+      );
+    },
+    [clearProviderQuery, setSearchParams],
+  );
+
+  const isPlatformSelectDisabled = connectedProviders.length === 0;
+
   const platformItems = useMemo(
     () =>
-      PROVIDER_TYPES.map((value) => ({
+      connectedProviders.map((value) => ({
         label: PLATFORM_MAP[value],
         onClick: () => setSelectedPlatform(value),
       })),
-    [],
+    [connectedProviders, setSelectedPlatform],
   );
 
+  useEffect(() => {
+    if (!hasConnectionData) return;
+    if (!searchParams.has("provider")) return;
+
+    const parsed = parseProviderParam(searchParams.get("provider"));
+    if (parsed !== "전체" && connectedProviders.includes(parsed)) return;
+
+    clearProviderQuery();
+  }, [hasConnectionData, searchParams, connectedProviders, clearProviderQuery]);
+
   const selectedPlatformLabel =
     selectedPlatform === "전체"
       ? "플랫폼 선택"
@@ -44,12 +141,20 @@ export default function PlatformDashboard() {
         selectedPlatformLabel={selectedPlatformLabel}
         platformItems={platformItems}
         onSelectAll={() => setSelectedPlatform("전체")}
+        isPlatformSelectDisabled={isPlatformSelectDisabled}
         className="mobile:hidden"
       />,
     );
 
     return () => setHeaderRight(null);
-  }, [isAllView, platformItems, selectedPlatformLabel, setHeaderRight]);
+  }, [
+    isAllView,
+    platformItems,
+    selectedPlatformLabel,
+    setHeaderRight,
+    isPlatformSelectDisabled,
+    setSelectedPlatform,
+  ]);
 
   return (
     <section className="flex w-full min-w-0 flex-col gap-8">
@@ -58,6 +163,7 @@ export default function PlatformDashboard() {
         selectedPlatformLabel={selectedPlatformLabel}
         platformItems={platformItems}
         onSelectAll={() => setSelectedPlatform("전체")}
+        isPlatformSelectDisabled={isPlatformSelectDisabled}
         layout="mobile"
       />
       {isAllView ? (
diff --git a/src/types/dashboard/platform.ts b/src/types/dashboard/platform.ts
index 22051e60..f35777ef 100644
--- a/src/types/dashboard/platform.ts
+++ b/src/types/dashboard/platform.ts
@@ -29,6 +29,12 @@ export interface IPlatformPerformance extends IMetricsResponse {
   provider: TProviderType;
 }
 
+/** 전체보기 성과 조회 — 부분 실패 시 성공분만 platforms에 포함 */
+export interface IPlatformPerformanceQueryData {
+  platforms: IPlatformPerformance[];
+  failedProviders: TProviderType[];
+}
+
 // 플랫폼별 성과 효율 비교
 export interface IPlatformEfficiencyData {
   status: string;
diff --git a/src/utils/integration/mapPlatformAccounts.ts b/src/utils/integration/mapPlatformAccounts.ts
index d7233619..f528ccf5 100644
--- a/src/utils/integration/mapPlatformAccounts.ts
+++ b/src/utils/integration/mapPlatformAccounts.ts
@@ -42,9 +42,19 @@ function startOfDay(date: Date): Date {
 
 export function isTokenExpired(tokenExpireAt?: string): boolean {
   if (!tokenExpireAt) return false;
-  const expire = parseDate(tokenExpireAt);
+  const trimmed = tokenExpireAt.trim();
+  const expire = parseDate(trimmed);
   if (!expire) return false;
-  return startOfDay(expire).getTime() < startOfDay(new Date()).getTime();
+
+  // date-only(YYYY-MM-DD): 로컬 달력 기준 — 만료일 당일부터 만료로 봄
+  // (ex. tokenExpireAt "2026-08-08", 오늘이 8일 -> 재연동 필요)
+  if (DATE_ONLY_PATTERN.test(trimmed)) {
+    return startOfDay(expire).getTime() <= startOfDay(new Date()).getTime();
+  }
+
+  // datetime(ISO 등): UTC 날짜 문자열만 보면 전날처럼 보여도 KST로는 오늘 0시인 경우가 있음
+  // → 달력이 아니라 실제 만료 시각과 현재 시각을 비교
+  return expire.getTime() < Date.now();
 }
 
 export function isTokenExpiringSoon(tokenExpireAt?: string): boolean {