final dev

backend/src/routes/runtimeRoutes.js

@@ -53,4 +53,17 @@ router.post(
   })
 );
 
+router.post(
+  '/activities/clear-recent',
+  asyncHandler(async (req, res) => {
+    logger.info('post:runtime:activities:clear-recent', { reqId: req.reqId });
+    const result = runtimeActivityService.clearRecent();
+    res.json({
+      ok: true,
+      removed: Number(result?.removed || 0),
+      snapshot: result?.snapshot || runtimeActivityService.getSnapshot()
+    });
+  })
+);
+
 module.exports = router;

backend/src/services/runtimeActivityService.js

@@ -183,6 +183,19 @@ class RuntimeActivityService {
     return this.buildSnapshot();
   }
 
+  clearRecent() {
+    const removed = this.recent.length;
+    if (removed === 0) {
+      return { removed: 0, snapshot: this.buildSnapshot() };
+    }
+    this.recent = [];
+    this.broadcastSnapshot();
+    return {
+      removed,
+      snapshot: this.buildSnapshot()
+    };
+  }
+
   setControls(activityId, handlers = {}) {
     const id = normalizeNumber(activityId);
     if (!id || !this.active.has(id)) {