06/04 Optimize app

models.py

@@ -1073,7 +1073,24 @@ def get_user_active_shifts(user_id: int):
 
 # ─── Admin Dashboard ──────────────────────────────────────────────────────────
 
+_admin_stats_cache: dict | None = None
+_admin_stats_cached_at: datetime.datetime | None = None
+_ADMIN_STATS_TTL_S = 60  # seconds
+
+
+def invalidate_admin_stats_cache():
+    global _admin_stats_cache, _admin_stats_cached_at
+    _admin_stats_cache = None
+    _admin_stats_cached_at = None
+
+
 def get_admin_dashboard_stats():
+    global _admin_stats_cache, _admin_stats_cached_at
+    now = datetime.datetime.now()
+    if (_admin_stats_cache is not None and _admin_stats_cached_at is not None
+            and (now - _admin_stats_cached_at).total_seconds() < _ADMIN_STATS_TTL_S):
+        return _admin_stats_cache
+
     conn = None
     try:
         conn = get_connection()
@@ -1123,7 +1140,7 @@ def get_admin_dashboard_stats():
         )
         ai_analyses_30d = cur.fetchone()["n"]
         cur.close()
-        return {
+        result = {
             "user_stats":      user_stats,
             "total_sites":     total_sites,
             "total_users":     total_users,
@@ -1132,6 +1149,9 @@ def get_admin_dashboard_stats():
             "bids_due_soon":   bids_due_soon,
             "ai_analyses_30d": ai_analyses_30d,
         }
+        _admin_stats_cache = result
+        _admin_stats_cached_at = now
+        return result
     finally:
         if conn:
             conn.close()