fix: reports page — add asset lat/lng to /api/visits for map button, fix null field guard in form error handler

server.py

@@ -2611,7 +2611,7 @@ def list_visits(
         params.append(date_to + " 23:59:59")
 
     where = " AND ".join(conditions)
-    sql = """SELECT v.*, a.name AS asset_name, a.machine_id,
+    sql = """SELECT v.*, a.name AS asset_name, a.machine_id, a.latitude, a.longitude,
                     u.username AS user_name
              FROM visits v
              LEFT JOIN assets a ON v.asset_id = a.id

static/index.html

@@ -3927,7 +3927,7 @@
       if (field) field.classList.add('error');
       if (errEl) { errEl.textContent = '⚠️ ' + msg; errEl.classList.add('visible'); }
       // Mark parent section
-      const section = field.closest('.form-collapse-section');
+      const section = field ? field.closest('.form-collapse-section') : null;
       if (section) { section.classList.add('has-error'); openFormSection(section.id); }
     }