fix(controller): resolve F-01 — HomeController now matches MapController dashboard data query

src/app/Http/Controllers/HomeController.php

@@ -8,11 +8,37 @@ class HomeController extends Controller
 {
     public function index()
     {
-        $stations = DB::table('station')
-            ->select('stationid', 'name', 'district', 'lat', 'lng', 'rainfall', 'waterlevel', 'siren')
-            ->orderBy('stationid')
+        $data = DB::table('station as s')
+            ->leftJoin('rainfall as r', function($join) {
+                $join->on('r.stationid', '=', 's.stationid')
+                     ->whereRaw('r.timestamp = (SELECT MAX(timestamp) FROM rainfall WHERE stationid = s.stationid)');
+            })
+            ->leftJoin('waterlevel as w', function($join) {
+                $join->on('w.stationid', '=', 's.stationid')
+                     ->whereRaw('w.datetime = (SELECT MAX(datetime) FROM waterlevel WHERE stationid = s.stationid)');
+            })
+            ->leftJoin('siren as sir', function($join) {
+                $join->on('sir.stationid', '=', 's.stationid')
+                     ->whereRaw('sir.active_time = (SELECT MAX(active_time) FROM siren WHERE stationid = s.stationid)');
+            })
+            ->whereNotNull('s.lat')
+            ->whereNotNull('s.lng')
+            ->where(function($query) {
+                $query->whereNotNull('r.hourly')
+                    ->orWhereNotNull('w.waterlevel');
+            })
+            ->select(
+                's.*',
+                'r.hourly as rainfall_value',
+                'r.timestamp as rainfall_time',
+                'w.waterlevel as waterlevel_value',
+                'w.datetime as waterlevel_time',
+                'sir.level as siren_level',
+                'sir.active_time as siren_time'
+            )
+            ->orderBy('s.stationid', 'asc')
             ->get();
 
-        return view('layout.dashboard', compact('stations'));
+        return view('layout.dashboard', compact('data'));
     }
 }