feat(metrics): add pressure threshold helper

app/Support/Metrics/PressureLevel.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Support\Metrics;
+
+class PressureLevel
+{
+    public static function for(?float $percent, string $kind = 'default'): string
+    {
+        if ($percent === null) {
+            return 'ok';
+        }
+
+        [$warn, $error] = $kind === 'disk' ? [80.0, 90.0] : [70.0, 90.0];
+
+        return match (true) {
+            $percent >= $error => 'error',
+            $percent >= $warn => 'warning',
+            default => 'ok',
+        };
+    }
+
+    public static function textClass(string $level): string
+    {
+        return match ($level) {
+            'error' => 'text-red-500 dark:text-red-400',
+            'warning' => 'text-orange-500 dark:text-warning',
+            default => 'text-black dark:text-fg',
+        };
+    }
+
+    public static function barClass(string $level): string
+    {
+        return match ($level) {
+            'error' => 'bg-red-500 dark:bg-red-400',
+            'warning' => 'bg-orange-500 dark:bg-warning',
+            default => 'bg-neutral-400 dark:bg-white/30',
+        };
+    }
+}

tests/Unit/Metrics/PressureLevelTest.php

@@ -0,0 +1,22 @@
+<?php
+
+use App\Support\Metrics\PressureLevel;
+
+it('classifies cpu/memory pressure at 70/90 cutoffs', function () {
+    expect(PressureLevel::for(10, 'cpu'))->toBe('ok');
+    expect(PressureLevel::for(70, 'cpu'))->toBe('warning');
+    expect(PressureLevel::for(89.9, 'memory'))->toBe('warning');
+    expect(PressureLevel::for(90, 'memory'))->toBe('error');
+});
+
+it('classifies disk pressure at 80/90 cutoffs', function () {
+    expect(PressureLevel::for(75, 'disk'))->toBe('ok');
+    expect(PressureLevel::for(80, 'disk'))->toBe('warning');
+    expect(PressureLevel::for(95, 'disk'))->toBe('error');
+});
+
+it('treats a null percent as ok and maps levels to classes', function () {
+    expect(PressureLevel::for(null, 'cpu'))->toBe('ok');
+    expect(PressureLevel::textClass('error'))->toContain('text-red-500');
+    expect(PressureLevel::barClass('warning'))->toContain('bg-orange-500');
+});