refactor(toast): HUD 상태 라인 피드백 통합 및 우선순위 큐 적용

src/shared/lib/useHudStatusLine.ts

@@ -0,0 +1,103 @@
+'use client';
+
+import { useCallback, useEffect, useMemo, useState } from 'react';
+
+export type HudStatusLinePriority = 'normal' | 'undo';
+
+export interface HudStatusLineAction {
+  label: string;
+  onClick: () => void;
+}
+
+export interface HudStatusLinePayload {
+  message: string;
+  durationMs?: number;
+  action?: HudStatusLineAction;
+  priority?: HudStatusLinePriority;
+}
+
+export interface HudStatusLineItem extends HudStatusLinePayload {
+  id: number;
+  priority: HudStatusLinePriority;
+}
+
+const MAX_PENDING_MESSAGES = 2;
+const MAX_TOTAL_MESSAGES = MAX_PENDING_MESSAGES + 1;
+const DEFAULT_DURATION_MS = 2000;
+const DEFAULT_UNDO_DURATION_MS = 4200;
+
+export const useHudStatusLine = (enabled = true) => {
+  const [queue, setQueue] = useState<HudStatusLineItem[]>([]);
+
+  useEffect(() => {
+    if (enabled) {
+      return;
+    }
+
+    setQueue([]);
+  }, [enabled]);
+
+  useEffect(() => {
+    if (!enabled || queue.length === 0) {
+      return;
+    }
+
+    const active = queue[0];
+    const durationMs =
+      active.durationMs ?? (active.action ? DEFAULT_UNDO_DURATION_MS : DEFAULT_DURATION_MS);
+    const timerId = window.setTimeout(() => {
+      setQueue((current) => current.slice(1));
+    }, durationMs);
+
+    return () => {
+      window.clearTimeout(timerId);
+    };
+  }, [enabled, queue]);
+
+  const pushStatusLine = useCallback((payload: HudStatusLinePayload) => {
+    const nextItem: HudStatusLineItem = {
+      id: Date.now() + Math.floor(Math.random() * 10000),
+      ...payload,
+      priority: payload.priority ?? (payload.action ? 'undo' : 'normal'),
+    };
+
+    setQueue((current) => {
+      if (current.length === 0) {
+        return [nextItem];
+      }
+
+      const [active, ...pending] = current;
+      const nextQueue =
+        nextItem.priority === 'undo'
+          ? [active, nextItem, ...pending]
+          : [active, ...pending, nextItem];
+
+      return nextQueue.slice(0, MAX_TOTAL_MESSAGES);
+    });
+  }, []);
+
+  const dismissActiveStatus = useCallback(() => {
+    setQueue((current) => current.slice(1));
+  }, []);
+
+  const runActiveAction = useCallback(() => {
+    const active = queue[0];
+
+    if (!active?.action) {
+      dismissActiveStatus();
+      return;
+    }
+
+    active.action.onClick();
+    dismissActiveStatus();
+  }, [dismissActiveStatus, queue]);
+
+  return useMemo(() => {
+    return {
+      activeStatus: queue[0] ?? null,
+      pushStatusLine,
+      runActiveAction,
+      dismissActiveStatus,
+    };
+  }, [dismissActiveStatus, pushStatusLine, queue, runActiveAction]);
+};

src/widgets/space-focus-hud/ui/SpaceFocusHudWidget.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useRef, useState } from 'react';
+import type { HudStatusLineItem, HudStatusLinePayload } from '@/shared/lib/useHudStatusLine';
 import { useReducedMotion } from '@/shared/lib/useReducedMotion';
-import { useToast } from '@/shared/ui';
 import { SpaceTimerHudWidget } from '@/widgets/space-timer-hud';
 import { GoalCompleteSheet } from './GoalCompleteSheet';
 import { GoalFlashOverlay } from './GoalFlashOverlay';
@@ -10,6 +10,9 @@ interface SpaceFocusHudWidgetProps {
   timerLabel: string;
   visible: boolean;
   onGoalUpdate: (nextGoal: string) => void;
+  statusLine: HudStatusLineItem | null;
+  onStatusAction: () => void;
+  onStatusMessage: (payload: HudStatusLinePayload) => void;
 }
 
 export const SpaceFocusHudWidget = ({
@@ -17,8 +20,10 @@ export const SpaceFocusHudWidget = ({
   timerLabel,
   visible,
   onGoalUpdate,
+  statusLine,
+  onStatusAction,
+  onStatusMessage,
 }: SpaceFocusHudWidgetProps) => {
-  const { pushToast } = useToast();
   const reducedMotion = useReducedMotion();
   const [flashVisible, setFlashVisible] = useState(false);
   const [sheetOpen, setSheetOpen] = useState(false);
@@ -95,9 +100,18 @@ export const SpaceFocusHudWidget = ({
       <SpaceTimerHudWidget
         timerLabel={timerLabel}
         goal={goal}
+        statusLine={
+          statusLine
+            ? {
+                message: statusLine.message,
+                actionLabel: statusLine.action?.label,
+              }
+            : null
+        }
         isImmersionMode
         className="pr-[4.2rem]"
         onGoalCompleteRequest={handleOpenCompleteSheet}
+        onStatusAction={onStatusAction}
         onPlaybackStateChange={(state) => {
           if (reducedMotion) {
             playbackStateRef.current = state;
@@ -117,21 +131,21 @@ export const SpaceFocusHudWidget = ({
         onClose={() => setSheetOpen(false)}
         onRest={() => {
           setSheetOpen(false);
-          pushToast({ title: '좋아요. 5분 뒤에 다시 알려드릴게요.' });
+          onStatusMessage({ message: '좋아요. 5분 뒤에 다시 알려드릴게요.' });
 
           if (restReminderTimerRef.current) {
             window.clearTimeout(restReminderTimerRef.current);
           }
 
           restReminderTimerRef.current = window.setTimeout(() => {
-            pushToast({ title: '5분이 지났어요. 다음 한 조각으로 돌아와요.' });
+            onStatusMessage({ message: '5분이 지났어요. 다음 한 조각으로 돌아와요.' });
             restReminderTimerRef.current = null;
           }, 5 * 60 * 1000);
         }}
         onConfirm={(nextGoal) => {
           onGoalUpdate(nextGoal);
           setSheetOpen(false);
-          pushToast({ title: '다음 한 조각으로 이어갑니다.' });
+          onStatusMessage({ message: '다음 한 조각으로 이어갑니다.' });
           triggerFlash(1200);
         }}
       />

src/widgets/space-timer-hud/ui/SpaceTimerHudWidget.tsx

@@ -12,8 +12,13 @@ interface SpaceTimerHudWidgetProps {
   goal: string;
   className?: string;
   isImmersionMode?: boolean;
+  statusLine?: {
+    message: string;
+    actionLabel?: string;
+  } | null;
   onPlaybackStateChange?: (state: 'running' | 'paused') => void;
   onGoalCompleteRequest?: () => void;
+  onStatusAction?: () => void;
 }
 
 const HUD_ACTIONS = [
@@ -27,8 +32,10 @@ export const SpaceTimerHudWidget = ({
   goal,
   className,
   isImmersionMode = false,
+  statusLine = null,
   onPlaybackStateChange,
   onGoalCompleteRequest,
+  onStatusAction,
 }: SpaceTimerHudWidgetProps) => {
   const { isBreatheMode, hintMessage, triggerRestart } = useRestart30s();
   const normalizedGoal = goal.trim().length > 0 ? goal.trim() : '이번 한 조각을 설정해 주세요.';
@@ -89,7 +96,22 @@ export const SpaceTimerHudWidget = ({
                 완료
               </button>
             </div>
-            {hintMessage ? (
+            {statusLine ? (
+              <div className="mt-1 flex min-w-0 items-center gap-2">
+                <p className={cn('min-w-0 truncate text-[11px]', isImmersionMode ? 'text-white/68' : 'text-white/66')}>
+                  {statusLine.message}
+                </p>
+                {statusLine.actionLabel ? (
+                  <button
+                    type="button"
+                    onClick={onStatusAction}
+                    className="shrink-0 text-[11px] font-medium text-white/76 underline-offset-2 transition-colors hover:text-white/92 hover:underline"
+                  >
+                    {statusLine.actionLabel}
+                  </button>
+                ) : null}
+              </div>
+            ) : hintMessage ? (
               <p className={cn('mt-1 truncate text-[10px]', isImmersionMode ? 'text-white/52' : 'text-white/52')}>
                 {hintMessage}
               </p>

src/widgets/space-tools-dock/model/applyQuickPack.ts

@@ -2,30 +2,30 @@ interface ApplyQuickPackParams {
   packId: 'balanced' | 'deep-work' | 'gentle';
   onTimerSelect: (timerLabel: string) => void;
   onSelectPreset: (presetId: string) => void;
-  pushToast: (payload: { title: string; description?: string }) => void;
+  onApplied?: (message: string) => void;
 }
 
 export const applyQuickPack = ({
   packId,
   onTimerSelect,
   onSelectPreset,
-  pushToast,
+  onApplied,
 }: ApplyQuickPackParams) => {
   if (packId === 'balanced') {
     onTimerSelect('25/5');
     onSelectPreset('rain-focus');
-    pushToast({ title: 'Balanced 팩을 적용했어요.' });
+    onApplied?.('Balanced 팩을 적용했어요.');
     return;
   }
 
   if (packId === 'deep-work') {
     onTimerSelect('50/10');
     onSelectPreset('deep-white');
-    pushToast({ title: 'Deep Work 팩을 적용했어요.' });
+    onApplied?.('Deep Work 팩을 적용했어요.');
     return;
   }
 
   onTimerSelect('25/5');
   onSelectPreset('silent');
-  pushToast({ title: 'Gentle 팩을 적용했어요.' });
+  onApplied?.('Gentle 팩을 적용했어요.');
 };

src/widgets/space-tools-dock/ui/SpaceToolsDockWidget.tsx

@@ -6,6 +6,7 @@ import { SOUND_PRESETS, type RecentThought, type TimerPreset } from '@/entities/
 import { ExitHoldButton } from '@/features/exit-hold';
 import { ManagePlanSheetContent, PaywallSheetContent } from '@/features/paywall-sheet';
 import { PlanPill } from '@/features/plan-pill';
+import type { HudStatusLinePayload } from '@/shared/lib/useHudStatusLine';
 import { useToast } from '@/shared/ui';
 import { cn } from '@/shared/lib/cn';
 import { ControlCenterSheetWidget } from '@/widgets/control-center-sheet';
@@ -40,6 +41,7 @@ interface SpaceToolsDockWidgetProps {
   onRestoreThought: (thought: RecentThought) => void;
   onRestoreThoughts: (thoughts: RecentThought[]) => void;
   onClearInbox: () => RecentThought[];
+  onStatusMessage: (payload: HudStatusLinePayload) => void;
   onExitRequested: () => void;
 }
 
@@ -65,6 +67,7 @@ export const SpaceToolsDockWidget = ({
   onRestoreThought,
   onRestoreThoughts,
   onClearInbox,
+  onStatusMessage,
   onExitRequested,
 }: SpaceToolsDockWidgetProps) => {
   const { pushToast } = useToast();
@@ -171,9 +174,10 @@ export const SpaceToolsDockWidget = ({
     }
 
     setNoteDraft('');
-    pushToast({
-      title: '인박스에 저장됨',
+    onStatusMessage({
+      message: '인박스에 저장됨',
       durationMs: 4200,
+      priority: 'undo',
       action: {
         label: '실행취소',
         onClick: () => {
@@ -183,7 +187,7 @@ export const SpaceToolsDockWidget = ({
             return;
           }
 
-          pushToast({ title: '저장 취소됨' });
+          onStatusMessage({ message: '저장 취소됨' });
         },
       },
     });
@@ -198,14 +202,15 @@ export const SpaceToolsDockWidget = ({
 
     const willBeCompleted = !thought.isCompleted;
 
-    pushToast({
-      title: willBeCompleted ? '완료 처리됨' : '완료 해제됨',
+    onStatusMessage({
+      message: willBeCompleted ? '완료 처리됨' : '완료 해제됨',
       durationMs: 4200,
+      priority: 'undo',
       action: {
         label: '실행취소',
         onClick: () => {
           onRestoreThought(previousThought);
-          pushToast({ title: willBeCompleted ? '완료 처리를 취소했어요.' : '완료 해제를 취소했어요.' });
+          onStatusMessage({ message: willBeCompleted ? '완료 처리를 취소했어요.' : '완료 해제를 취소했어요.' });
         },
       },
     });
@@ -218,14 +223,15 @@ export const SpaceToolsDockWidget = ({
       return;
     }
 
-    pushToast({
-      title: '삭제됨',
+    onStatusMessage({
+      message: '삭제됨',
       durationMs: 4200,
+      priority: 'undo',
       action: {
         label: '실행취소',
         onClick: () => {
           onRestoreThought(removedThought);
-          pushToast({ title: '삭제를 취소했어요.' });
+          onStatusMessage({ message: '삭제를 취소했어요.' });
         },
       },
     });
@@ -235,18 +241,19 @@ export const SpaceToolsDockWidget = ({
     const snapshot = onClearInbox();
 
     if (snapshot.length === 0) {
-      pushToast({ title: '인박스가 비어 있어요.' });
+      onStatusMessage({ message: '인박스가 비어 있어요.' });
       return;
     }
 
-    pushToast({
-      title: '모두 비워짐',
+    onStatusMessage({
+      message: '모두 비워짐',
       durationMs: 4200,
+      priority: 'undo',
       action: {
         label: '실행취소',
         onClick: () => {
           onRestoreThoughts(snapshot);
-          pushToast({ title: '인박스를 복구했어요.' });
+          onStatusMessage({ message: '인박스를 복구했어요.' });
         },
       },
     });
@@ -273,7 +280,14 @@ export const SpaceToolsDockWidget = ({
   };
 
   const handleApplyPack = (packId: 'balanced' | 'deep-work' | 'gentle') =>
-    applyQuickPack({ packId, onTimerSelect, onSelectPreset, pushToast });
+    applyQuickPack({
+      packId,
+      onTimerSelect,
+      onSelectPreset,
+      onApplied: (message) => {
+        onStatusMessage({ message, durationMs: 1200 });
+      },
+    });
 
   const showVolumeFeedback = (nextVolume: number) => {
     setVolumeFeedback(`${nextVolume}%`);
@@ -413,7 +427,6 @@ export const SpaceToolsDockWidget = ({
                   onVolumeKeyDown={handleVolumeKeyDown}
                   onSelectPreset={(presetId) => {
                     onSelectPreset(presetId);
-                    pushToast({ title: '사운드 변경(더미)' });
                     setOpenPopover(null);
                   }}
                 />
@@ -447,15 +460,12 @@ export const SpaceToolsDockWidget = ({
             soundPresets={SOUND_PRESETS}
             onSelectRoom={(roomId) => {
               onRoomSelect(roomId);
-              pushToast({ title: '공간을 바꿨어요.' });
             }}
             onSelectTimer={(label) => {
               onTimerSelect(label);
-              pushToast({ title: `타이머를 ${label}로 바꿨어요.` });
             }}
             onSelectSound={(presetId) => {
               onSelectPreset(presetId);
-              pushToast({ title: '사운드를 바꿨어요.' });
             }}
             onApplyPack={handleApplyPack}
             onLockedClick={handleLockedClick}

src/widgets/space-workspace/ui/SpaceWorkspaceWidget.tsx

@@ -16,6 +16,7 @@ import {
   type TimerPreset,
 } from '@/entities/session';
 import { useSoundPresetSelection } from '@/features/sound-preset';
+import { useHudStatusLine } from '@/shared/lib/useHudStatusLine';
 import { useToast } from '@/shared/ui';
 import { SpaceFocusHudWidget } from '@/widgets/space-focus-hud';
 import { SpaceSetupDrawerWidget } from '@/widgets/space-setup-drawer';
@@ -102,6 +103,7 @@ export const SpaceWorkspaceWidget = () => {
 
   const canStart = goalInput.trim().length > 0;
   const isFocusMode = workspaceMode === 'focus';
+  const { activeStatus, pushStatusLine, runActiveAction } = useHudStatusLine(isFocusMode);
 
   const handleGoalChipSelect = (chip: GoalChip) => {
     setSelectedGoalId(chip.id);
@@ -122,9 +124,8 @@ export const SpaceWorkspaceWidget = () => {
     }
 
     setWorkspaceMode('focus');
-
-    pushToast({
-      title: `목표: ${goalInput.trim()} 시작해요.`,
+    pushStatusLine({
+      message: `목표: ${goalInput.trim()} 시작해요.`,
     });
   };
 
@@ -182,6 +183,9 @@ export const SpaceWorkspaceWidget = () => {
         goal={goalInput.trim()}
         timerLabel={selectedTimerLabel}
         visible={isFocusMode}
+        statusLine={activeStatus}
+        onStatusAction={runActiveAction}
+        onStatusMessage={pushStatusLine}
         onGoalUpdate={(nextGoal) => {
           setGoalInput(nextGoal);
           setSelectedGoalId(null);
@@ -210,6 +214,7 @@ export const SpaceWorkspaceWidget = () => {
         onRestoreThought={restoreThought}
         onRestoreThoughts={restoreThoughts}
         onClearInbox={clearThoughts}
+        onStatusMessage={pushStatusLine}
         onExitRequested={handleExitRequested}
       />
     </div>