diff --git a/app/game-frontend/e2e/auction.spec.ts b/app/game-frontend/e2e/auction.spec.ts
index a1145086..80fa9fc1 100644
--- a/app/game-frontend/e2e/auction.spec.ts
+++ b/app/game-frontend/e2e/auction.spec.ts
@@ -299,12 +299,16 @@ test('resource auction preserves the legacy desktop structure, geometry, and int
     const bidInput = page.getByRole('spinbutton', { name: '1번 경매 입찰가' });
     await bidInput.fill('800');
     await page.getByRole('button', { name: '입찰', exact: true }).click();
-    await expect(page.getByRole('alert')).toContainText('금이 부족합니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="error"]')).toContainText(
+        '금이 부족합니다.'
+    );
     await page.screenshot({ path: 'test-results/auction/resource-desktop-error.png', fullPage: true });
     expect(state.resourceBidCount).toBe(0);
 
     await page.getByRole('button', { name: '입찰', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('입찰했습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '입찰했습니다.'
+    );
     expect(state.resourceBidCount).toBe(1);
 
     await firstRow.hover();
@@ -370,7 +374,9 @@ test('unique auction separates ongoing and finished lists and auto-loads the leg
         await dialog.accept();
     });
     await page.getByRole('button', { name: '입찰', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('입찰이 완료되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '입찰이 완료되었습니다.'
+    );
     expect(state.uniqueBidCount).toBe(1);
     await page.screenshot({ path: 'test-results/auction/unique-desktop.png', fullPage: true });
 });
diff --git a/app/game-frontend/e2e/nationOffices.spec.ts b/app/game-frontend/e2e/nationOffices.spec.ts
index acf920c4..12716a2c 100644
--- a/app/game-frontend/e2e/nationOffices.spec.ts
+++ b/app/game-frontend/e2e/nationOffices.spec.ts
@@ -596,11 +596,15 @@ test('finance enforces edit permissions and preserves the old value across an AP
     const input = page.getByRole('spinbutton', { name: '세율' });
     await input.fill('25');
     await page.locator('.policy-cell').filter({ hasText: '세율' }).getByRole('button', { name: '변경' }).click();
-    await expect(page.getByRole('alert')).toContainText('세율을 변경할 수 없습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="error"]')).toContainText(
+        '세율을 변경할 수 없습니다.'
+    );
     await expect(input).toHaveValue('20');
     await input.fill('25');
     await page.locator('.policy-cell').filter({ hasText: '세율' }).getByRole('button', { name: '변경' }).click();
-    await expect(page.getByRole('status')).toContainText('세율을 변경했습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '세율을 변경했습니다.'
+    );
     expect(state.rate).toBe(25);
 
     const readOnly = await page.context().newPage();
diff --git a/app/game-frontend/e2e/npcPolicy.spec.ts b/app/game-frontend/e2e/npcPolicy.spec.ts
index 97e0b2ab..2def11c0 100644
--- a/app/game-frontend/e2e/npcPolicy.spec.ts
+++ b/app/game-frontend/e2e/npcPolicy.spec.ts
@@ -282,7 +282,9 @@ test('desktop geometry, typography, textures, drag, focus, tooltip, and successf
     await goldInput.fill('12345');
     page.once('dialog', (dialog) => dialog.accept());
     await page.locator('#container > .control_bar').getByRole('button', { name: '설정' }).click();
-    await expect(page.getByRole('status')).toContainText('NPC 정책이 반영되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        'NPC 정책이 반영되었습니다.'
+    );
     expect(state.mutations).toContain('npc.setNationPolicy');
     await screenshot(page, 'core-npc-policy-desktop.png');
 });
diff --git a/app/game-frontend/e2e/tournamentBracket.spec.ts b/app/game-frontend/e2e/tournamentBracket.spec.ts
index 9fa44672..6f7f0940 100644
--- a/app/game-frontend/e2e/tournamentBracket.spec.ts
+++ b/app/game-frontend/e2e/tournamentBracket.spec.ts
@@ -372,7 +372,9 @@ test('join refresh shows the assigned preliminary group immediately with accessi
     await expect(page.getByLabel('토너먼트 대진표')).toHaveCount(0);
     await join.click();
 
-    await expect(page.getByRole('status')).toHaveText('참가 신청이 반영되었습니다. 六조에 배정되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '참가 신청이 반영되었습니다. 六조에 배정되었습니다.'
+    );
     await expect(join).toBeDisabled();
     const preliminaryTabs = page.getByRole('tablist', { name: '예선 조 선택' });
     await expect(preliminaryTabs.getByRole('tab').nth(5)).toHaveAttribute('aria-selected', 'true');
@@ -413,7 +415,9 @@ test('desktop join scrolls the assigned preliminary group into view without futu
     await expect(page.getByLabel('토너먼트 대진표')).toHaveCount(0);
     await page.getByRole('button', { name: '참가' }).click();
 
-    await expect(page.getByRole('status')).toHaveText('참가 신청이 반영되었습니다. 八조에 배정되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '참가 신청이 반영되었습니다. 八조에 배정되었습니다.'
+    );
     const assignedGroup = page.locator('[data-preliminary-group="7"]');
     await expect(assignedGroup.locator('.general-identity', { hasText: names[0] })).toBeVisible();
     const bounds = await assignedGroup.boundingBox();
@@ -612,7 +616,9 @@ test('mobile betting rankings use tabs and keep dedicated icons beside general n
     );
     await dialog.getByRole('button', { name: '베팅 등록' }).click();
     await expect(dialog).not.toBeVisible();
-    await expect(page.getByRole('status')).toHaveText('베팅이 등록되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '베팅이 등록되었습니다.'
+    );
     expect(placedBets).toEqual([{ targetId: 1, amount: 50 }]);
 
     await expect(page.getByRole('tablist', { name: '토너먼트 랭킹 종목 선택' })).toBeVisible();
diff --git a/app/game-frontend/e2e/troop.spec.ts b/app/game-frontend/e2e/troop.spec.ts
index 583f52b4..9d05df00 100644
--- a/app/game-frontend/e2e/troop.spec.ts
+++ b/app/game-frontend/e2e/troop.spec.ts
@@ -387,12 +387,16 @@ test('shows API failure then creates a troop successfully', async ({ page }) =>
     const input = page.getByRole('textbox', { name: '부대명' });
     await input.fill('실패대');
     await page.getByRole('button', { name: '부대 창설', exact: true }).click();
-    await expect(page.getByRole('alert')).toContainText('부대 이름이 없습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="error"]')).toContainText(
+        '부대 이름이 없습니다.'
+    );
     expect(state.me.troopId).toBe(0);
 
     await input.fill('신규대');
     await page.getByRole('button', { name: '부대 창설', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('신규대 부대가 생성되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '신규대 부대가 생성되었습니다.'
+    );
     await expect(page.locator('.troopInfo').filter({ hasText: '신규대' })).toBeVisible();
     await expect(input).toBeHidden();
 });
@@ -410,13 +414,17 @@ test('renames and kicks through confirm dialogs, then refreshes state', async ({
     await page.getByRole('button', { name: '부대명 변경...' }).first().click();
     await page.getByRole('textbox', { name: '새 부대명' }).fill('백마의종');
     await page.getByRole('button', { name: '변경', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('부대명을 변경했습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '부대명을 변경했습니다.'
+    );
     await expect(page.locator('.troopInfo').filter({ hasText: '백마의종' })).toBeVisible();
 
     await page.getByRole('button', { name: '부대원 추방...' }).click();
     await page.getByRole('combobox', { name: '추방할 부대원' }).selectOption('3');
     await page.getByRole('button', { name: '추방', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('조운을 추방했습니다.');
+    await expect(
+        page.locator('[data-testid="game-toast"][data-feedback-kind="success"]').filter({ hasText: '조운' })
+    ).toContainText('조운을 추방했습니다.');
     await expect(page.locator('.troopMembers').first()).not.toContainText('조운');
 });
 
diff --git a/app/game-frontend/src/views/AuctionView.vue b/app/game-frontend/src/views/AuctionView.vue
index ed31780c..45b7f56c 100644
--- a/app/game-frontend/src/views/AuctionView.vue
+++ b/app/game-frontend/src/views/AuctionView.vue
@@ -5,6 +5,7 @@ import { useRoute } from 'vue-router';
 
 import { formatLog } from '../utils/formatLog';
 import { trpc } from '../utils/trpc';
+import { useGameFeedback } from '../composables/useGameFeedback';
 
 type AuctionOverview = Awaited<ReturnType<typeof trpc.auction.getOverview.query>>;
 type ResourceAuction = AuctionOverview['resourceAuctions'][number];
@@ -16,12 +17,12 @@ const activeTab = ref<'resource' | 'unique'>(route.query.type === 'unique' ? 'un
 const loading = ref(false);
 const actionBusy = ref(false);
 const error = ref<string | null>(null);
-const message = ref<string | null>(null);
 const overview = ref<AuctionOverview | null>(null);
 const selectedResource = ref<ResourceAuction | null>(null);
 const selectedUnique = ref<UniqueAuction | null>(null);
 const uniqueDetail = ref<UniqueDetail | null>(null);
 const bidAmount = ref(0);
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const openForm = reactive({
     type: 'BUY_RICE' as 'BUY_RICE' | 'SELL_RICE',
@@ -111,12 +112,11 @@ const runAction = async (action: () => Promise<void>): Promise<void> => {
     }
     actionBusy.value = true;
     error.value = null;
-    message.value = null;
     try {
         await action();
         await loadOverview();
     } catch (err) {
-        error.value = resolveErrorMessage(err);
+        showErrorToast(resolveErrorMessage(err));
     } finally {
         actionBusy.value = false;
     }
@@ -134,7 +134,7 @@ const openResourceAuction = (): Promise<void> =>
             openForm.type === 'BUY_RICE'
                 ? await trpc.auction.openBuyRice.mutate(input)
                 : await trpc.auction.openSellRice.mutate(input);
-        message.value = `${result.auctionId}번 경매로 등록되었습니다.`;
+        showSuccessToast(`${result.auctionId}번 경매로 등록되었습니다.`);
     });
 
 const bidResourceAuction = (): Promise<void> =>
@@ -151,7 +151,7 @@ const bidResourceAuction = (): Promise<void> =>
         } else {
             await trpc.auction.bidSellRice.mutate({ auctionId: auction.id, amount: bidAmount.value });
         }
-        message.value = '입찰했습니다.';
+        showSuccessToast('입찰했습니다.');
     });
 
 const bidUniqueAuction = (): Promise<void> =>
@@ -172,14 +172,13 @@ const bidUniqueAuction = (): Promise<void> =>
             amount: bidAmount.value,
             tryExtendCloseDate: false,
         });
-        message.value = '입찰이 완료되었습니다.';
+        showSuccessToast('입찰이 완료되었습니다.');
     });
 
 const closeWindow = (): void => window.close();
 
 watch(activeTab, (tab) => {
     error.value = null;
-    message.value = null;
     if (tab === 'unique' && !selectedUnique.value && ongoingUnique.value[0]) {
         void selectUnique(ongoingUnique.value[0]);
     }
@@ -230,7 +229,6 @@ onMounted(() => {
         </header>
 
         <p v-if="error" class="auction-notice error" role="alert">{{ error }}</p>
-        <p v-if="message" class="auction-notice success" role="status">{{ message }}</p>
         <div v-if="loading && !overview" class="loading-state">불러오는 중...</div>
 
         <section v-else-if="activeTab === 'resource'" class="resource-auction bg0">
@@ -756,9 +754,6 @@ input:focus-visible {
 .auction-notice.error {
     background: #842029;
 }
-.auction-notice.success {
-    background: #0f5132;
-}
 .loading-state {
     min-height: 120px;
     display: grid;
diff --git a/app/game-frontend/src/views/BettingView.vue b/app/game-frontend/src/views/BettingView.vue
index 9207e61e..6d1a47fd 100644
--- a/app/game-frontend/src/views/BettingView.vue
+++ b/app/game-frontend/src/views/BettingView.vue
@@ -4,6 +4,7 @@ import { computed, nextTick, onMounted, ref } from 'vue';
 import TournamentBracket from '../components/tournament/TournamentBracket.vue';
 import TournamentPageHeader from '../components/tournament/TournamentPageHeader.vue';
 import GeneralIdentity from '../components/ui/GeneralIdentity.vue';
+import { useGameFeedback } from '../composables/useGameFeedback';
 import type { TournamentBracketSlot } from '../utils/tournamentBracket';
 import { trpc } from '../utils/trpc';
 
@@ -14,7 +15,6 @@ const summary = ref<Awaited<ReturnType<typeof trpc.tournament.getBettingSummary.
 const rankings = ref<Awaited<ReturnType<typeof trpc.tournament.getRankings.query>>>([]);
 const loading = ref(false);
 const error = ref<string | null>(null);
-const message = ref<string | null>(null);
 const amounts = ref<Record<number, number>>({});
 const selectedTarget = ref<TournamentBracketSlot | null>(null);
 const betDialog = ref<HTMLDialogElement | null>(null);
@@ -22,6 +22,7 @@ const betAmountSelect = ref<HTMLSelectElement | null>(null);
 const placingBet = ref(false);
 const betError = ref<string | null>(null);
 const activeRankingPrefix = ref('tt');
+const { success: showSuccessToast } = useGameFeedback();
 const typeNames = ['전력전', '통솔전', '일기토', '설전'];
 const stageNames = [
     '경기 없음',
@@ -109,17 +110,15 @@ const placeBet = async () => {
     const targetId = selectedTarget.value?.id;
     if (targetId === null || targetId === undefined || placingBet.value) return;
     const amount = selectedAmount.value;
-    message.value = null;
     betError.value = null;
     placingBet.value = true;
     try {
         await trpc.tournament.placeBet.mutate({ targetId, amount });
-        message.value = '베팅이 등록되었습니다.';
+        showSuccessToast('베팅이 등록되었습니다.');
         await load();
         closeBetDialog();
     } catch (value) {
         betError.value = errorText(value);
-        message.value = betError.value;
     } finally {
         placingBet.value = false;
     }
@@ -138,7 +137,6 @@ const placeBet = async () => {
                 갱신
             </button>
             <span v-if="loading">불러오는 중...</span>
-            <span v-if="message" role="status">{{ message }}</span>
         </section>
         <section v-if="error" class="error bg0" role="alert">{{ error }}</section>
         <section class="state bg0">
diff --git a/app/game-frontend/src/views/InheritView.vue b/app/game-frontend/src/views/InheritView.vue
index 63632d38..e5963ba8 100644
--- a/app/game-frontend/src/views/InheritView.vue
+++ b/app/game-frontend/src/views/InheritView.vue
@@ -3,6 +3,7 @@ import { formatServerDateTime } from '@sammo-ts/common/time/ServerDateTime';
 import { JosaUtil } from '@sammo-ts/common/util/JosaUtil';
 import { computed, onMounted, reactive, ref } from 'vue';
 import { trpc } from '../utils/trpc';
+import { useGameFeedback } from '../composables/useGameFeedback';
 
 type InheritStatus = Awaited<ReturnType<typeof trpc.inherit.getStatus.query>>;
 type InheritLog = Awaited<ReturnType<typeof trpc.inherit.getLogs.query>>[number];
@@ -110,9 +111,8 @@ const logs = ref<InheritLog[]>([]);
 const logLoading = ref(false);
 const logEnd = ref(false);
 
-const actionError = ref<string | null>(null);
-const actionMessage = ref<string | null>(null);
 const actionBusy = ref(false);
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const joinConfig = ref<JoinConfig | null>(null);
 
@@ -262,7 +262,6 @@ const syncSelections = () => {
 const loadStatus = async () => {
     loading.value = true;
     error.value = null;
-    actionError.value = null;
     try {
         status.value = await trpc.inherit.getStatus.query();
         syncSelections();
@@ -292,7 +291,7 @@ const loadLogs = async (reset = false) => {
         logs.value = reset ? result : [...logs.value, ...result];
         logEnd.value = result.length < 30;
     } catch (err) {
-        actionError.value = resolveErrorMessage(err);
+        showErrorToast(resolveErrorMessage(err));
     } finally {
         logLoading.value = false;
     }
@@ -303,17 +302,15 @@ const runAction = async (action: () => Promise<void>, message?: string) => {
         return;
     }
     actionBusy.value = true;
-    actionError.value = null;
-    actionMessage.value = null;
     try {
         await action();
         if (message) {
-            actionMessage.value = message;
+            showSuccessToast(message);
         }
         await loadStatus();
         await loadLogs(true);
     } catch (err) {
-        actionError.value = resolveErrorMessage(err);
+        showErrorToast(resolveErrorMessage(err));
     } finally {
         actionBusy.value = false;
     }
@@ -335,7 +332,7 @@ const buyHiddenBuff = async (key: BuffKey) => {
 
 const reserveSpecialWar = async () => {
     if (!nextSpecialKey.value) {
-        actionError.value = '다음 전투 특기를 선택해주세요.';
+        showErrorToast('다음 전투 특기를 선택해주세요.');
         return;
     }
     const name = specialNameMap.value.get(nextSpecialKey.value) ?? nextSpecialKey.value;
@@ -371,7 +368,7 @@ const resetTurnTime = async () => {
 
 const resetStats = async () => {
     if (resetStatErrors.value.length > 0) {
-        actionError.value = resetStatErrors.value[0] ?? '입력값을 확인해주세요.';
+        showErrorToast(resetStatErrors.value[0] ?? '입력값을 확인해주세요.');
         return;
     }
     if (!window.confirm('능력치를 초기화하시겠습니까?')) {
@@ -400,16 +397,16 @@ const buyRandomUnique = async () => {
 const openUniqueAuction = async () => {
     const selectedItem = status.value?.availableUnique.find((item) => item.key === uniqueForm.itemId.trim());
     if (!selectedItem) {
-        actionError.value = '유니크를 선택해주세요.';
+        showErrorToast('유니크를 선택해주세요.');
         return;
     }
     const amount = Math.max(0, Math.floor(uniqueForm.amount));
     if (amount <= 0) {
-        actionError.value = '입찰 포인트를 입력해주세요.';
+        showErrorToast('입찰 포인트를 입력해주세요.');
         return;
     }
     if (previousPoint.value < amount) {
-        actionError.value = '유산 포인트가 부족합니다.';
+        showErrorToast('유산 포인트가 부족합니다.');
         return;
     }
     const itemJosa = JosaUtil.pick(selectedItem.rawName, '을');
@@ -427,7 +424,7 @@ const openUniqueAuction = async () => {
 const checkOwner = async () => {
     const targetId = Number(ownerTargetId.value);
     if (!targetId) {
-        actionError.value = '확인할 장수를 선택해주세요.';
+        showErrorToast('확인할 장수를 선택해주세요.');
         return;
     }
     const cost = status.value?.inheritConst.inheritCheckOwnerPoint ?? 0;
@@ -465,8 +462,7 @@ onMounted(() => {
 
     <main id="container" class="inherit-page legacy-bg0">
         <input type="hidden" name="inheritanceAction" value="inherit" />
-        <div v-if="error || actionError" class="notice error" role="alert">{{ error ?? actionError }}</div>
-        <div v-if="actionMessage" class="notice success">{{ actionMessage }}</div>
+        <div v-if="error" class="notice error" role="alert">{{ error }}</div>
         <div v-if="loading" class="loading-state">불러오는 중...</div>
 
         <template v-else-if="status">
@@ -821,10 +817,6 @@ onMounted(() => {
     color: #ffb0b0;
 }
 
-.notice.success {
-    color: #b6efb6;
-}
-
 .point-grid,
 .action-grid,
 .buff-grid {
diff --git a/app/game-frontend/src/views/NationBettingView.vue b/app/game-frontend/src/views/NationBettingView.vue
index 5d752974..5bff5945 100644
--- a/app/game-frontend/src/views/NationBettingView.vue
+++ b/app/game-frontend/src/views/NationBettingView.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { computed, onMounted, ref } from 'vue';
 
+import { useGameFeedback } from '../composables/useGameFeedback';
 import { trpc } from '../utils/trpc';
 
 type BettingListItem = {
@@ -56,7 +57,7 @@ const loadingList = ref(false);
 const loadingDetail = ref(false);
 const submitting = ref(false);
 const errorMessage = ref('');
-const noticeMessage = ref('');
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const currentYearMonth = computed(() => {
     if (!detail.value) {
@@ -265,13 +266,10 @@ const loadList = async () => {
     }
 };
 
-const loadDetail = async (bettingId: number, resetSelection = true, preserveNotice = false) => {
+const loadDetail = async (bettingId: number, resetSelection = true) => {
     selectedBettingId.value = bettingId;
     loadingDetail.value = true;
     errorMessage.value = '';
-    if (!preserveNotice) {
-        noticeMessage.value = '';
-    }
     try {
         detail.value = await bettingApi.getDetail.query({ bettingId });
         if (resetSelection) {
@@ -299,7 +297,7 @@ const toggleCandidate = (index: number) => {
         return;
     }
     if (current.length >= info.value.selectCnt) {
-        errorMessage.value = `이미 ${info.value.selectCnt}개를 선택했습니다.`;
+        showErrorToast(`이미 ${info.value.selectCnt}개를 선택했습니다.`);
         return;
     }
     selectedCandidates.value = [...current, index];
@@ -311,19 +309,18 @@ const submitBet = async () => {
     }
     submitting.value = true;
     errorMessage.value = '';
-    noticeMessage.value = '';
     try {
         await bettingApi.bet.mutate({
             bettingId: info.value.id,
             bettingType: [...selectedCandidates.value],
             amount: amount.value,
         });
-        noticeMessage.value = '베팅했습니다';
-        await loadDetail(info.value.id, true, true);
+        showSuccessToast('베팅했습니다');
+        await loadDetail(info.value.id, true);
         await loadList();
     } catch (error) {
         // Legacy form keeps the selected candidates and amount after a failed request.
-        errorMessage.value = getErrorMessage(error);
+        showErrorToast(getErrorMessage(error));
     } finally {
         submitting.value = false;
     }
@@ -353,7 +350,6 @@ onMounted(() => {
         </header>
 
         <div v-if="errorMessage" class="betting-notice error" role="alert">{{ errorMessage }}</div>
-        <div v-if="noticeMessage" class="betting-notice success" role="status">{{ noticeMessage }}</div>
 
         <section v-if="detail && info" class="betting-detail">
             <div class="section-title legacy-bg2">
@@ -668,11 +664,6 @@ onMounted(() => {
     color: #ffd0d0;
 }
 
-.betting-notice.success {
-    border: 1px solid #477a47;
-    color: #d8f5d8;
-}
-
 @media (min-width: 1000px) {
     .nation-betting-page {
         width: 1000px;
diff --git a/app/game-frontend/src/views/NationStratFinanView.vue b/app/game-frontend/src/views/NationStratFinanView.vue
index 8e502ceb..f294e425 100644
--- a/app/game-frontend/src/views/NationStratFinanView.vue
+++ b/app/game-frontend/src/views/NationStratFinanView.vue
@@ -5,13 +5,13 @@ import { trpc } from '../utils/trpc';
 import { resolveDiplomacyInfo } from '../utils/diplomacy';
 import { legacyNationTextColor } from '../utils/legacyNationColor';
 import LegacyHtmlEditor from '../components/ui/LegacyHtmlEditor.vue';
+import { useGameFeedback } from '../composables/useGameFeedback';
 
 type StratFinanResponse = Awaited<ReturnType<typeof trpc.nation.getStratFinan.query>>;
 type NationEntry = StratFinanResponse['nationsList'][number];
 
 const loading = ref(false);
 const error = ref<string | null>(null);
-const status = ref<string | null>(null);
 const data = ref<StratFinanResponse | null>(null);
 const nationMsg = ref('');
 const scoutMsg = ref('');
@@ -21,6 +21,7 @@ const editingNationMsg = ref(false);
 const editingScoutMsg = ref(false);
 const policy = reactive({ rate: 0, bill: 0, secretLimit: 0, blockScout: false, blockWar: false });
 const oldPolicy = reactive({ rate: 0, bill: 0, secretLimit: 0 });
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const resolveErrorMessage = (value: unknown): string =>
     value instanceof Error ? value.message : typeof value === 'string' ? value : 'unknown_error';
@@ -69,17 +70,15 @@ const mutation = async <T,>(
     action: () => Promise<T>,
     message: string,
     rollback?: () => void
-): Promise<T | undefined> => {
-    error.value = null;
-    status.value = null;
+): Promise<{ ok: true; value: T } | { ok: false }> => {
     try {
-        const result = await action();
-        status.value = message;
-        return result;
+        const value = await action();
+        showSuccessToast(message);
+        return { ok: true, value };
     } catch (err) {
         rollback?.();
-        error.value = resolveErrorMessage(err);
-        return undefined;
+        showErrorToast(resolveErrorMessage(err));
+        return { ok: false };
     }
 };
 
@@ -97,9 +96,9 @@ const saveNationMsg = async () => {
         () => trpc.nation.setNotice.mutate({ msg: nationMsgDraft.value }),
         '국가 방침을 변경했습니다.'
     );
-    if (result) {
-        nationMsg.value = result.msg;
-        nationMsgDraft.value = result.msg;
+    if (result.ok) {
+        nationMsg.value = result.value.msg;
+        nationMsgDraft.value = result.value.msg;
         editingNationMsg.value = false;
     }
 };
@@ -117,36 +116,36 @@ const saveScoutMsg = async () => {
         () => trpc.nation.setScoutMsg.mutate({ msg: scoutMsgDraft.value }),
         '임관 권유문을 변경했습니다.'
     );
-    if (result) {
-        scoutMsg.value = result.msg;
-        scoutMsgDraft.value = result.msg;
+    if (result.ok) {
+        scoutMsg.value = result.value.msg;
+        scoutMsgDraft.value = result.value.msg;
         editingScoutMsg.value = false;
     }
 };
-const setRate = () =>
-    mutation(
+const setRate = async () => {
+    const result = await mutation(
         () => trpc.nation.setRate.mutate({ amount: policy.rate }),
         '세율을 변경했습니다.',
         () => (policy.rate = oldPolicy.rate)
-    ).then(() => {
-        if (!error.value) oldPolicy.rate = policy.rate;
-    });
-const setBill = () =>
-    mutation(
+    );
+    if (result.ok) oldPolicy.rate = policy.rate;
+};
+const setBill = async () => {
+    const result = await mutation(
         () => trpc.nation.setBill.mutate({ amount: policy.bill }),
         '지급률을 변경했습니다.',
         () => (policy.bill = oldPolicy.bill)
-    ).then(() => {
-        if (!error.value) oldPolicy.bill = policy.bill;
-    });
-const setSecretLimit = () =>
-    mutation(
+    );
+    if (result.ok) oldPolicy.bill = policy.bill;
+};
+const setSecretLimit = async () => {
+    const result = await mutation(
         () => trpc.nation.setSecretLimit.mutate({ amount: policy.secretLimit }),
         '기밀 권한을 변경했습니다.',
         () => (policy.secretLimit = oldPolicy.secretLimit)
-    ).then(() => {
-        if (!error.value) oldPolicy.secretLimit = policy.secretLimit;
-    });
+    );
+    if (result.ok) oldPolicy.secretLimit = policy.secretLimit;
+};
 const setBlockWar = async () => {
     const next = policy.blockWar;
     await mutation(
@@ -182,7 +181,6 @@ onMounted(() => void loadStratFinan());
         </nav>
 
         <div v-if="error" class="feedback error" role="alert">{{ error }}</div>
-        <div v-if="status" class="feedback status" role="status">{{ status }}</div>
         <div v-if="loading" class="loading">불러오는 중...</div>
 
         <template v-if="data && !loading">
diff --git a/app/game-frontend/src/views/NpcControlView.vue b/app/game-frontend/src/views/NpcControlView.vue
index 0e35cfd7..4bf66f42 100644
--- a/app/game-frontend/src/views/NpcControlView.vue
+++ b/app/game-frontend/src/views/NpcControlView.vue
@@ -2,6 +2,7 @@
 import { computed, onMounted, ref, watch } from 'vue';
 
 import SortableStringList from '../components/ui/SortableStringList';
+import { useGameFeedback } from '../composables/useGameFeedback';
 import { npcPriorityHelp } from '../utils/npcPriorityHelp';
 import { trpc } from '../utils/trpc';
 
@@ -37,7 +38,6 @@ interface PriorityPanel {
 
 const loading = ref(false);
 const error = ref<string | null>(null);
-const notice = ref<string | null>(null);
 const data = ref<NpcPolicyResponse | null>(null);
 const policyDraft = ref<NationPolicy | null>(null);
 const lastSavedPolicy = ref<NationPolicy | null>(null);
@@ -45,6 +45,7 @@ const nationPriority = ref<PriorityListState | null>(null);
 const generalPriority = ref<PriorityListState | null>(null);
 const lastSavedNationPriority = ref<string[]>([]);
 const lastSavedGeneralPriority = ref<string[]>([]);
+const { success: showSuccessToast, error: showErrorToast, info: showInfoToast } = useGameFeedback();
 
 const resolveErrorMessage = (value: unknown): string => {
     if (value instanceof Error) return value.message;
@@ -283,25 +284,23 @@ const priorityPanels = computed<PriorityPanel[]>(() => {
 const resetPolicy = () => {
     if (!data.value || !window.confirm('초기 설정으로 되돌릴까요?')) return;
     policyDraft.value = clonePolicy(data.value.defaultNationPolicy);
-    notice.value = '서버 초깃값을 적용했습니다. 설정 버튼을 누르면 반영됩니다.';
+    showInfoToast('서버 초깃값을 적용했습니다. 설정 버튼을 누르면 반영됩니다.');
 };
 
 const rollbackPolicy = () => {
     if (!lastSavedPolicy.value || !window.confirm('이전 설정으로 되돌릴까요?')) return;
     policyDraft.value = clonePolicy(lastSavedPolicy.value);
-    notice.value = '이전 설정으로 되돌렸습니다.';
+    showInfoToast('이전 설정으로 되돌렸습니다.');
 };
 
 const submitPolicy = async () => {
     if (!policyDraft.value || !window.confirm('저장할까요?')) return;
-    error.value = null;
-    notice.value = null;
     try {
         await trpc.npc.setNationPolicy.mutate(policyDraft.value);
         lastSavedPolicy.value = clonePolicy(policyDraft.value);
-        notice.value = 'NPC 정책이 반영되었습니다.';
+        showSuccessToast('NPC 정책이 반영되었습니다.');
     } catch (caught) {
-        error.value = `설정하지 못했습니다: ${resolveErrorMessage(caught)}`;
+        showErrorToast(`설정하지 못했습니다: ${resolveErrorMessage(caught)}`);
     }
 };
 
@@ -318,7 +317,7 @@ const resetPriority = (section: PrioritySectionKey) => {
             data.value.availableGeneralActionPriorityItems
         );
     }
-    notice.value = '서버 초깃값을 적용했습니다. 설정 버튼을 누르면 반영됩니다.';
+    showInfoToast('서버 초깃값을 적용했습니다. 설정 버튼을 누르면 반영됩니다.');
 };
 
 const rollbackPriority = (section: PrioritySectionKey) => {
@@ -334,14 +333,12 @@ const rollbackPriority = (section: PrioritySectionKey) => {
             data.value.availableGeneralActionPriorityItems
         );
     }
-    notice.value = '이전 설정으로 되돌렸습니다.';
+    showInfoToast('이전 설정으로 되돌렸습니다.');
 };
 
 const submitPriority = async (section: PrioritySectionKey) => {
     const state = section === 'nation' ? nationPriority.value : generalPriority.value;
     if (!state || !window.confirm('저장할까요?')) return;
-    error.value = null;
-    notice.value = null;
     try {
         if (section === 'nation') {
             await trpc.npc.setNationPriority.mutate(state.active);
@@ -350,9 +347,9 @@ const submitPriority = async (section: PrioritySectionKey) => {
             await trpc.npc.setGeneralPriority.mutate(state.active);
             lastSavedGeneralPriority.value = [...state.active];
         }
-        notice.value = 'NPC 정책이 반영되었습니다.';
+        showSuccessToast('NPC 정책이 반영되었습니다.');
     } catch (caught) {
-        error.value = `설정하지 못했습니다: ${resolveErrorMessage(caught)}`;
+        showErrorToast(`설정하지 못했습니다: ${resolveErrorMessage(caught)}`);
     }
 };
 </script>
@@ -380,9 +377,6 @@ const submitPriority = async (section: PrioritySectionKey) => {
                 }})
             </div>
 
-            <div v-if="error" class="feedback error-feedback" role="alert">{{ error }}</div>
-            <div v-if="notice" class="feedback notice-feedback" role="status">{{ notice }}</div>
-
             <div class="form_list">
                 <div v-for="field in policyFields" :key="field.key" class="policy-field">
                     <div class="field-row">
@@ -628,26 +622,12 @@ const submitPriority = async (section: PrioritySectionKey) => {
     box-sizing: border-box;
 }
 
-.feedback {
-    margin: 4px 12px;
-    padding: 5px 10px;
-    border: 1px solid;
-    border-radius: 4px;
-}
-
-.error-feedback,
 .error-state {
     color: #ffd4d4;
     border-color: #a94442;
     background-color: rgba(120, 20, 20, 0.75);
 }
 
-.notice-feedback {
-    color: #d9ffd9;
-    border-color: #3c763d;
-    background-color: rgba(20, 90, 20, 0.7);
-}
-
 .form_list {
     display: grid;
     grid-template-columns: repeat(2, minmax(0, 1fr));
diff --git a/app/game-frontend/src/views/SurveyView.vue b/app/game-frontend/src/views/SurveyView.vue
index c6c36b57..29a1fe2a 100644
--- a/app/game-frontend/src/views/SurveyView.vue
+++ b/app/game-frontend/src/views/SurveyView.vue
@@ -3,6 +3,7 @@ import { formatServerDateTime } from '@sammo-ts/common/time/ServerDateTime';
 import { computed, onMounted, ref } from 'vue';
 import { useRouter } from 'vue-router';
 
+import { useGameFeedback } from '../composables/useGameFeedback';
 import { trpc } from '../utils/trpc';
 
 type VoteListResponse = Awaited<ReturnType<typeof trpc.vote.getVoteList.query>>;
@@ -17,8 +18,7 @@ const loading = ref(false);
 const detailLoading = ref(false);
 const isVoteAdmin = ref(false);
 const showNewVote = ref(false);
-const message = ref('');
-const messageKind = ref<'success' | 'error'>('success');
+const loadError = ref('');
 const mySinglePick = ref(0);
 const myMultiPick = ref<number[]>([]);
 const myComment = ref('');
@@ -26,6 +26,7 @@ const newVoteTitle = ref('');
 const newVoteOptionsText = ref('');
 const newVoteMultipleOptions = ref(1);
 const router = useRouter();
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const getErrorMessage = (error: unknown): string => {
     if (error instanceof Error) {
@@ -34,11 +35,6 @@ const getErrorMessage = (error: unknown): string => {
     return typeof error === 'string' ? error : '요청을 처리하지 못했습니다.';
 };
 
-const showMessage = (text: string, kind: 'success' | 'error') => {
-    message.value = text;
-    messageKind.value = kind;
-};
-
 const isEnded = (poll: { endAt: string | null; closedAt: string | null }): boolean => {
     if (poll.closedAt) {
         return true;
@@ -79,6 +75,7 @@ const voteColorText = (index: number): string => ([1, 2].includes(index % 7) ? '
 
 const loadVoteDetail = async (voteId: number) => {
     detailLoading.value = true;
+    loadError.value = '';
     try {
         const detail = await trpc.vote.getVoteDetail.query({ voteId });
         currentVote.value = detail;
@@ -87,7 +84,7 @@ const loadVoteDetail = async (voteId: number) => {
         myMultiPick.value = detail.myVote ? [...detail.myVote] : [];
         myComment.value = '';
     } catch (error) {
-        showMessage(getErrorMessage(error), 'error');
+        loadError.value = getErrorMessage(error);
     } finally {
         detailLoading.value = false;
     }
@@ -98,7 +95,7 @@ const reloadVote = async () => {
         return;
     }
     loading.value = true;
-    message.value = '';
+    loadError.value = '';
     try {
         const result = await trpc.vote.getVoteList.query();
         polls.value = result.polls;
@@ -114,7 +111,7 @@ const reloadVote = async () => {
             currentVote.value = null;
         }
     } catch (error) {
-        showMessage(getErrorMessage(error), 'error');
+        loadError.value = getErrorMessage(error);
     } finally {
         loading.value = false;
     }
@@ -130,7 +127,7 @@ const changeMultiPick = (index: number, checked: boolean) => {
     const limit = currentVote.value?.voteInfo.multipleOptions ?? 0;
     if (checked && limit > 0 && myMultiPick.value.length > limit) {
         myMultiPick.value = myMultiPick.value.filter((value) => value !== index);
-        showMessage(`${limit}개까지만 선택할 수 있습니다.`, 'error');
+        showErrorToast(`${limit}개까지만 선택할 수 있습니다.`);
     }
 };
 
@@ -140,7 +137,7 @@ const submitVote = async () => {
     }
     const selection = currentVote.value.voteInfo.multipleOptions === 1 ? [mySinglePick.value] : [...myMultiPick.value];
     if (selection.length === 0) {
-        showMessage('선택한 항목이 없습니다.', 'error');
+        showErrorToast('선택한 항목이 없습니다.');
         return;
     }
     try {
@@ -148,10 +145,10 @@ const submitVote = async () => {
             voteId: currentVote.value.voteInfo.id,
             selection,
         });
-        showMessage(result.wonLottery ? '특별한 설문 보상이 제공되었습니다!' : '설문을 마쳤습니다.', 'success');
+        showSuccessToast(result.wonLottery ? '특별한 설문 보상이 제공되었습니다!' : '설문을 마쳤습니다.');
         await loadVoteDetail(currentVote.value.voteInfo.id);
     } catch (error) {
-        showMessage(getErrorMessage(error), 'error');
+        showErrorToast(getErrorMessage(error));
     }
 };
 
@@ -165,10 +162,10 @@ const submitComment = async () => {
             text: myComment.value,
         });
         myComment.value = '';
-        showMessage('댓글을 달았습니다.', 'success');
+        showSuccessToast('댓글을 달았습니다.');
         await loadVoteDetail(currentVote.value.voteInfo.id);
     } catch (error) {
-        showMessage(getErrorMessage(error), 'error');
+        showErrorToast(getErrorMessage(error));
     }
 };
 
@@ -182,14 +179,14 @@ const submitNewVote = async () => {
             revealMode: 'after_vote',
             closePrevious: true,
         });
-        showMessage('설문 조사가 생성되었습니다.', 'success');
+        showSuccessToast('설문 조사가 생성되었습니다.');
         newVoteTitle.value = '';
         newVoteOptionsText.value = '';
         newVoteMultipleOptions.value = 1;
         showNewVote.value = false;
         await reloadVote();
     } catch (error) {
-        showMessage(getErrorMessage(error), 'error');
+        showErrorToast(getErrorMessage(error));
     }
 };
 
@@ -229,14 +226,7 @@ onMounted(() => {
             <div></div>
         </header>
 
-        <div
-            v-if="message"
-            class="vote-notice"
-            :class="messageKind"
-            :role="messageKind === 'error' ? 'alert' : 'status'"
-        >
-            {{ message }}
-        </div>
+        <div v-if="loadError" class="vote-notice error" role="alert">{{ loadError }}</div>
         <div id="vote-title" class="bg2">설문 조사({{ voteReward }}금과 추첨으로 유니크템 증정!)</div>
 
         <div v-if="detailLoading && !currentVote" class="loading">불러오는 중...</div>
diff --git a/app/game-frontend/src/views/TournamentView.vue b/app/game-frontend/src/views/TournamentView.vue
index 700f85cb..a6eb4a05 100644
--- a/app/game-frontend/src/views/TournamentView.vue
+++ b/app/game-frontend/src/views/TournamentView.vue
@@ -4,6 +4,7 @@ import { computed, nextTick, onMounted, ref } from 'vue';
 import TournamentBracket from '../components/tournament/TournamentBracket.vue';
 import TournamentPageHeader from '../components/tournament/TournamentPageHeader.vue';
 import GeneralIdentity from '../components/ui/GeneralIdentity.vue';
+import { useGameFeedback } from '../composables/useGameFeedback';
 import { trpc } from '../utils/trpc';
 import { resolveTournamentSectionVisibility, resolveTournamentStageName } from '../utils/tournamentStatus';
 
@@ -14,11 +15,11 @@ const betting = ref<Awaited<ReturnType<typeof trpc.tournament.getBettingSummary.
 const myGeneralId = ref(0);
 const loading = ref(false);
 const error = ref<string | null>(null);
-const actionMessage = ref<string | null>(null);
 const adminEnabled = ref(false);
 const activeFinalGroup = ref(0);
 const activePreliminaryGroup = ref(0);
 const tournamentContainer = ref<HTMLElement | null>(null);
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const typeNames = ['전력전', '통솔전', '일기토', '설전'];
 const typeStatNames = ['종합', '통솔', '무력', '지력'];
@@ -133,21 +134,21 @@ const revealMyPreliminaryGroup = async (): Promise<number | undefined> => {
 };
 
 const join = async () => {
-    actionMessage.value = null;
     let joined = false;
     try {
         await trpc.tournament.join.mutate();
         joined = true;
     } catch (value) {
-        actionMessage.value = errorText(value);
+        showErrorToast(errorText(value));
     } finally {
         await load();
         if (joined) {
             const groupId = await revealMyPreliminaryGroup();
-            actionMessage.value =
+            showSuccessToast(
                 groupId === undefined
                     ? '참가 신청이 반영되었습니다.'
-                    : `참가 신청이 반영되었습니다. ${groupNames[groupId]}조에 배정되었습니다.`;
+                    : `참가 신청이 반영되었습니다. ${groupNames[groupId]}조에 배정되었습니다.`
+            );
         }
     }
 };
@@ -155,10 +156,10 @@ const join = async () => {
 const cancel = async () => {
     try {
         await trpc.tournament.cancel.mutate();
-        actionMessage.value = '토너먼트가 중단되었습니다.';
+        showSuccessToast('토너먼트가 중단되었습니다.');
         await load();
     } catch (value) {
-        actionMessage.value = errorText(value);
+        showErrorToast(errorText(value));
     }
 };
 
@@ -177,10 +178,10 @@ const start = async () => {
             bettingSettled: false,
             rewardSettled: false,
         });
-        actionMessage.value = '토너먼트를 개최했습니다.';
+        showSuccessToast('토너먼트를 개최했습니다.');
         await load();
     } catch (value) {
-        actionMessage.value = errorText(value);
+        showErrorToast(errorText(value));
     }
 };
 </script>
@@ -206,7 +207,6 @@ const start = async () => {
                 참가
             </button>
             <span v-if="loading">불러오는 중...</span>
-            <span v-if="actionMessage" role="status">{{ actionMessage }}</span>
         </section>
 
         <section v-if="error" class="error-row bg0" role="alert">{{ error }}</section>
diff --git a/app/game-frontend/src/views/TroopView.vue b/app/game-frontend/src/views/TroopView.vue
index 3eb9b542..4ddc7165 100644
--- a/app/game-frontend/src/views/TroopView.vue
+++ b/app/game-frontend/src/views/TroopView.vue
@@ -6,6 +6,7 @@ import { useRouter } from 'vue-router';
 import { resolveGeneralIconUrl, useDefaultGeneralIcon } from '../utils/generalIcon';
 import { trpc } from '../utils/trpc';
 import LegacyGeneralProgress from '../components/ui/LegacyGeneralProgress.vue';
+import { useGameFeedback } from '../composables/useGameFeedback';
 
 type TroopList = Awaited<ReturnType<typeof trpc.troop.getList.query>>;
 type Troop = TroopList['troops'][number];
@@ -15,8 +16,6 @@ type DialogKind = 'rename' | 'kick' | null;
 const loading = ref(false);
 const data = ref<TroopList | null>(null);
 const errorMessage = ref('');
-const noticeMessage = ref('');
-const noticeKind = ref<'success' | 'error'>('success');
 const createName = ref('');
 const editName = ref('');
 const kickTargetId = ref(0);
@@ -25,6 +24,7 @@ const dialogTroopId = ref(0);
 const popupMember = ref<Member | null>(null);
 const popupTop = ref(0);
 const router = useRouter();
+const { success: showSuccessToast, error: showErrorToast } = useGameFeedback();
 
 const me = computed(() => data.value?.me ?? null);
 
@@ -39,8 +39,11 @@ const getErrorMessage = (error: unknown): string => {
 };
 
 const showNotice = (message: string, kind: 'success' | 'error') => {
-    noticeMessage.value = message;
-    noticeKind.value = kind;
+    if (kind === 'success') {
+        showSuccessToast(message);
+    } else {
+        showErrorToast(message);
+    }
 };
 
 const refresh = async () => {
@@ -65,7 +68,6 @@ const runAction = async (action: () => Promise<void>) => {
         await refresh();
     } catch (error) {
         const message = getErrorMessage(error);
-        errorMessage.value = message;
         showNotice(message, 'error');
     }
 };
@@ -198,15 +200,7 @@ onMounted(() => {
             <div></div>
         </header>
 
-        <div
-            v-if="noticeMessage"
-            class="notice"
-            :class="noticeKind"
-            :role="noticeKind === 'error' ? 'alert' : 'status'"
-        >
-            {{ noticeMessage }}
-        </div>
-        <div v-if="errorMessage && !noticeMessage" class="notice error" role="alert">{{ errorMessage }}</div>
+        <div v-if="errorMessage" class="notice error" role="alert">{{ errorMessage }}</div>
         <div v-if="loading && !data" class="loading">불러오는 중...</div>
 
         <div v-if="data" id="troopList" class="bg0">
diff --git a/app/game-frontend/test/actionFeedbackContract.test.ts b/app/game-frontend/test/actionFeedbackContract.test.ts
new file mode 100644
index 00000000..612c1f9e
--- /dev/null
+++ b/app/game-frontend/test/actionFeedbackContract.test.ts
@@ -0,0 +1,29 @@
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import { describe, it } from 'node:test';
+
+const migratedViewNames = [
+    'AuctionView.vue',
+    'BettingView.vue',
+    'InheritView.vue',
+    'NationBettingView.vue',
+    'NationStratFinanView.vue',
+    'NpcControlView.vue',
+    'SurveyView.vue',
+    'TournamentView.vue',
+    'TroopView.vue',
+] as const;
+
+void describe('transient action feedback contract', () => {
+    for (const viewName of migratedViewNames) {
+        void it(`${viewName} sends action feedback through the shared toast layer`, async () => {
+            const source = await readFile(path.resolve(import.meta.dirname, `../src/views/${viewName}`), 'utf8');
+            const template = source.slice(source.indexOf('<template>'));
+
+            assert.match(source, /useGameFeedback/);
+            assert.doesNotMatch(template, /role="status"/);
+            assert.doesNotMatch(template, /class="[^"]*(?:success|status)[^"]*"[^>]*>\s*\{\{/);
+        });
+    }
+});
diff --git a/tools/frontend-legacy-parity/inheritance-management.spec.ts b/tools/frontend-legacy-parity/inheritance-management.spec.ts
index 8f3a121f..87ad78eb 100644
--- a/tools/frontend-legacy-parity/inheritance-management.spec.ts
+++ b/tools/frontend-legacy-parity/inheritance-management.spec.ts
@@ -415,7 +415,9 @@ test.describe('inheritance management legacy parity', () => {
         await expect.poll(() => fixture.uniqueAuctionRequests.length).toBe(1);
         expect(JSON.stringify(fixture.uniqueAuctionRequests[0])).toContain('che_서적_07_논어');
         expect(JSON.stringify(fixture.uniqueAuctionRequests[0])).toContain('6000');
-        await expect(page.locator('.notice.success')).toHaveText('성공했습니다. 경매장을 확인해주세요.');
+        await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+            '성공했습니다. 경매장을 확인해주세요.'
+        );
     });
 
     test('keeps controls usable and renders an API mutation error', async ({ page }) => {
diff --git a/tools/frontend-legacy-parity/public-gaps.spec.ts b/tools/frontend-legacy-parity/public-gaps.spec.ts
index 9f8786f0..dc2676b1 100644
--- a/tools/frontend-legacy-parity/public-gaps.spec.ts
+++ b/tools/frontend-legacy-parity/public-gaps.spec.ts
@@ -305,7 +305,9 @@ test('nation betting matches the legacy desktop geometry and preserves a failed
     await expect(page.locator('.betting-candidate.picked')).toHaveCount(2);
 
     await page.getByRole('button', { name: '베팅', exact: true }).click();
-    await expect(page.getByRole('status')).toContainText('베팅했습니다');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '베팅했습니다'
+    );
     await expect(amountInput).toHaveValue('0');
 
     if (artifactRoot) {
@@ -313,6 +315,29 @@ test('nation betting matches the legacy desktop geometry and preserves a failed
     }
 });
 
+test('nation betting reports failed and successful submissions through shared toasts', async ({ page }) => {
+    await installBettingFixture(page);
+    await page.goto(gameUrl('/nation-betting'));
+    await page.getByRole('button', { name: /천통국 예상/ }).click();
+    await page.locator('.betting-candidate').nth(0).click();
+    await page.locator('.betting-candidate').nth(1).click();
+
+    const amountInput = page.getByLabel('베팅 금액');
+    await amountInput.fill('300');
+    await page.getByRole('button', { name: '베팅', exact: true }).click();
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="error"]')).toContainText(
+        '유산포인트가 충분하지 않습니다.'
+    );
+    await expect(amountInput).toHaveValue('300');
+
+    await page.getByRole('button', { name: '베팅', exact: true }).click();
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '베팅했습니다'
+    );
+    await expect(amountInput).toHaveValue('0');
+    await expect(page.locator('.betting-notice.success')).toHaveCount(0);
+});
+
 test('nation betting keeps the legacy 500px three-column mobile contract', async ({ page }) => {
     await installBettingFixture(page);
     await page.setViewportSize({ width: 500, height: 900 });
diff --git a/tools/frontend-legacy-parity/tournament-betting.spec.ts b/tools/frontend-legacy-parity/tournament-betting.spec.ts
index 6b8b90c5..2e7efbad 100644
--- a/tools/frontend-legacy-parity/tournament-betting.spec.ts
+++ b/tools/frontend-legacy-parity/tournament-betting.spec.ts
@@ -366,11 +366,15 @@ test('tournament reloads its snapshot after failed and successful joins without
     await expect.poll(() => state.snapshotQueries).toBe(1);
 
     await join.click();
-    await expect(page.getByRole('status')).toHaveText('금이 부족합니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="error"]')).toContainText(
+        '금이 부족합니다.'
+    );
     await expect.poll(() => state.snapshotQueries).toBe(2);
 
     await join.click();
-    await expect(page.getByRole('status')).toHaveText('참가 신청이 반영되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '참가 신청이 반영되었습니다.'
+    );
     await expect.poll(() => state.snapshotQueries).toBe(3);
     expect(state.summaryQueries).toBe(3);
     expect(state.accessCalls).toBe(0);
@@ -423,12 +427,14 @@ test('betting keeps the 1120px and 16 by 70px layout and retains a failed select
     await bet.focus();
     await expect(bet).toBeFocused();
     await bet.click();
-    await expect(page.getByRole('status')).toHaveText('500금까지만 베팅 가능합니다.');
+    await expect(page.getByRole('alert')).toHaveText('500금까지만 베팅 가능합니다.');
     await expect(select).toHaveValue('500');
     await expect.poll(() => state.snapshotQueries).toBe(2);
 
     await bet.click();
-    await expect(page.getByRole('status')).toHaveText('베팅이 등록되었습니다.');
+    await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+        '베팅이 등록되었습니다.'
+    );
     await expect.poll(() => state.snapshotQueries).toBe(3);
     expect(state.summaryQueries).toBe(3);
     expect(state.rankingQueries).toBe(3);
diff --git a/tools/frontend-legacy-parity/visual-parity.spec.ts b/tools/frontend-legacy-parity/visual-parity.spec.ts
index 04aa5448..757f5811 100644
--- a/tools/frontend-legacy-parity/visual-parity.spec.ts
+++ b/tools/frontend-legacy-parity/visual-parity.spec.ts
@@ -1244,7 +1244,9 @@ test.describe('survey legacy parity', () => {
     test('submits a vote and comment through the real screen controls', async ({ page }) => {
         await page.goto(gameUrl('/survey'));
         await page.getByRole('button', { name: '투표', exact: true }).click();
-        await expect(page.getByRole('status')).toHaveText('설문을 마쳤습니다.');
+        await expect(page.locator('[data-testid="game-toast"][data-feedback-kind="success"]')).toContainText(
+            '설문을 마쳤습니다.'
+        );
         await expect(page.getByText('결산', { exact: true })).toBeVisible();
 
         await page.getByLabel('댓글').fill('새 댓글');