feat(scheduling): add 近期已干预 summary card (last 7 days)

Restore 替换建议 card and add a new emerald 近期已干预 card. Clicking
opens the history modal pre-filtered to the last 7 days (excluding
cancelled) via a toggle chip users can switch off.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/shared/scheduling/types.ts

@@ -100,6 +100,8 @@ export interface SchedulingSummary {
   hopelessCount: number;
   suggestionCount: number;
   estimatedGain: number;
+  /** Count of interventions created within the last 7 days (excluding cancelled). */
+  recentInterventionCount: number;
 }
 
 export interface SchedulingTargetOption {