refactor(feedback): 전역 토스트 제거 및 HUD 오버레이 피드백 도입

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

@@ -17,7 +17,6 @@ import {
 } 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';
 import { SpaceToolsDockWidget } from '@/widgets/space-tools-dock';
@@ -55,7 +54,6 @@ const resolveInitialTimerLabel = (timerLabelFromQuery: string | null) => {
 
 export const SpaceWorkspaceWidget = () => {
   const searchParams = useSearchParams();
-  const { pushToast } = useToast();
   const {
     thoughts,
     thoughtCount,
@@ -63,7 +61,6 @@ export const SpaceWorkspaceWidget = () => {
     removeThought,
     clearThoughts,
     restoreThought,
-    restoreThoughts,
     setThoughtCompleted,
   } = useThoughtInbox();
 
@@ -124,14 +121,10 @@ export const SpaceWorkspaceWidget = () => {
     }
 
     setWorkspaceMode('focus');
-    pushStatusLine({
-      message: `목표: ${goalInput.trim()} 시작해요.`,
-    });
   };
 
   const handleExitRequested = () => {
     setWorkspaceMode('setup');
-    pushToast({ title: '준비 모드로 돌아왔어요.' });
   };
 
   useEffect(() => {
@@ -212,7 +205,6 @@ export const SpaceWorkspaceWidget = () => {
         onDeleteThought={removeThought}
         onSetThoughtCompleted={setThoughtCompleted}
         onRestoreThought={restoreThought}
-        onRestoreThoughts={restoreThoughts}
         onClearInbox={clearThoughts}
         onStatusMessage={pushStatusLine}
         onExitRequested={handleExitRequested}