Fix heatmap button args

handlers/system.py

@@ -13,8 +13,7 @@ from keyboards import (
     system_logs_integrations_kb,
     system_logs_kb,
     openwrt_kb,
-    docker_kb,
-    backup_kb,
+    docker_kb, backup_kb,
 )
 from system_checks import security, disks, hardware, list_disks, smart_last_test
 from services.http_checks import get_url_checks, check_url
@@ -490,14 +489,15 @@ async def incidents_diff(msg: Message):
 async def alerts_heatmap(msg: Message):
     if not is_admin_msg(msg):
         return
-    parts = msg.text.split()
     hours = 48
     category = None
-    for part in parts[1:]:
-        if part.isdigit():
-            hours = max(1, int(part))
-        else:
-            category = part.lower()
+    if msg.text.startswith("/alerts_heatmap"):
+        parts = msg.text.split()
+        for part in parts[1:]:
+            if part.isdigit():
+                hours = max(1, int(part))
+            else:
+                category = part.lower()
     rows = read_raw(cfg, hours=hours, limit=8000, include_old=True)
     buckets: dict[datetime, int] = {}
     for dt, line in rows: