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/server/routes/scheduling/algorithm.ts

@@ -252,6 +252,7 @@ export function generateSuggestions(
     hopelessCount: hopeless.length,
     suggestionCount: filteredSuggestions.length,
     estimatedGain,
+    recentInterventionCount: 0,
   };
 
   return { suggestions: filteredSuggestions, summary };