feat(app): focus entry surface로 진입 화면 재구성

src/features/stats/api/statsApi.ts

@@ -17,6 +17,9 @@ export interface FocusStatsSummary {
     bestDayLabel: string;
     bestDayFocusMinutes: number;
     streakDays: number;
+    startedSessions: number;
+    completedSessions: number;
+    carriedOverCount: number;
   };
   trend: FocusTrendPoint[];
 }

src/features/stats/model/useFocusStats.ts

@@ -24,9 +24,12 @@ const buildMockSummary = (): FocusStatsSummary => {
     },
     last7Days: {
       focusMinutes: parseDurationLabelToMinutes(WEEKLY_STATS[0]?.value ?? '0m'),
-      bestDayLabel: WEEKLY_STATS[1]?.value ?? '-',
-      bestDayFocusMinutes: parseDurationLabelToMinutes(WEEKLY_STATS[1]?.delta ?? '0m'),
-      streakDays: Number.parseInt(WEEKLY_STATS[2]?.value ?? '0', 10) || 0,
+      bestDayLabel: WEEKLY_STATS[1]?.value ?? '수요일',
+      bestDayFocusMinutes: 210,
+      streakDays: 4,
+      startedSessions: 6,
+      completedSessions: 4,
+      carriedOverCount: 1,
     },
     trend: [],
   };