Improve day swipe and sleep handling

src/helpers.php

@@ -115,6 +115,23 @@ function format_points(float $value): string
     return number_format($rounded, 1, ',', '.');
 }
 
+function format_duration_hours(float $hours): string
+{
+    $minutes = max(0, (int) round($hours * 60));
+    $wholeHours = intdiv($minutes, 60);
+    $remainingMinutes = $minutes % 60;
+
+    if ($wholeHours <= 0) {
+        return $remainingMinutes . ' min';
+    }
+
+    if ($remainingMinutes === 0) {
+        return $wholeHours . ' h';
+    }
+
+    return $wholeHours . ' h ' . $remainingMinutes . ' min';
+}
+
 function normalize_username(string $username): string
 {
     return strtolower(trim($username));