feat: add BrentPriceResource with 30-day line chart widget

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Filament/Resources/BrentPriceResource.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Filament\Resources;
+
+use App\Filament\Resources\BrentPriceResource\Pages\ListBrentPrices;
+use App\Models\BrentPrice;
+use Filament\Resources\Resource;
+use Filament\Tables\Columns\TextColumn;
+use Filament\Tables\Table;
+
+class BrentPriceResource extends Resource
+{
+    protected static ?string $model = BrentPrice::class;
+
+    protected static string|\BackedEnum|null $navigationIcon = 'heroicon-o-currency-dollar';
+
+    protected static string|\UnitEnum|null $navigationGroup = 'Data';
+
+    protected static ?string $navigationLabel = 'Brent Prices';
+
+    protected static ?int $navigationSort = 2;
+
+    public static function table(Table $table): Table
+    {
+        return $table
+            ->columns([
+                TextColumn::make('date')
+                    ->date('d M Y')
+                    ->sortable(),
+                TextColumn::make('price_usd')
+                    ->label('Price (USD/barrel)')
+                    ->numeric(2)
+                    ->sortable(),
+            ])
+            ->defaultSort('date', 'desc')
+            ->recordActions([])
+            ->filters([]);
+    }
+
+    public static function getPages(): array
+    {
+        return [
+            'index' => ListBrentPrices::route('/'),
+        ];
+    }
+}

app/Filament/Resources/BrentPriceResource/Pages/ListBrentPrices.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Filament\Resources\BrentPriceResource\Pages;
+
+use App\Filament\Resources\BrentPriceResource;
+use App\Filament\Widgets\BrentPriceChartWidget;
+use Filament\Resources\Pages\ListRecords;
+
+class ListBrentPrices extends ListRecords
+{
+    protected static string $resource = BrentPriceResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [];
+    }
+
+    protected function getHeaderWidgets(): array
+    {
+        return [
+            BrentPriceChartWidget::class,
+        ];
+    }
+}

app/Filament/Widgets/BrentPriceChartWidget.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Filament\Widgets;
+
+use App\Models\BrentPrice;
+use Filament\Widgets\ChartWidget;
+
+class BrentPriceChartWidget extends ChartWidget
+{
+    protected ?string $heading = 'Brent Crude — Last 30 Days (USD/barrel)';
+
+    protected ?string $pollingInterval = null;
+
+    protected function getData(): array
+    {
+        $prices = BrentPrice::orderBy('date')
+            ->where('date', '>=', now()->subDays(30)->toDateString())
+            ->get();
+
+        return [
+            'datasets' => [
+                [
+                    'label' => 'USD/barrel',
+                    'data' => $prices->pluck('price_usd')->map(fn ($p) => (float) $p)->toArray(),
+                    'borderColor' => '#f59e0b',
+                    'fill' => false,
+                    'tension' => 0.3,
+                ],
+            ],
+            'labels' => $prices->pluck('date')
+                ->map(fn ($d) => $d->format('d M'))
+                ->toArray(),
+        ];
+    }
+
+    protected function getType(): string
+    {
+        return 'line';
+    }
+}

tests/Feature/Admin/BrentPriceResourceTest.php

@@ -0,0 +1,22 @@
+<?php
+
+use App\Filament\Resources\BrentPriceResource\Pages\ListBrentPrices;
+use App\Models\BrentPrice;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Livewire\Livewire;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->admin = User::factory()->admin()->create();
+    $this->actingAs($this->admin);
+});
+
+it('renders the brent price list', function () {
+    $prices = BrentPrice::factory()->count(3)->create();
+
+    Livewire::test(ListBrentPrices::class)
+        ->assertOk()
+        ->assertCanSeeTableRecords($prices);
+});