First pass of features

includes/expense_helpers.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * @param mixed $raw
+ * @return array<int, array<string, mixed>>
+ */
+function normalizeExpensesList($raw): array {
+    if (!is_array($raw) || !array_is_list($raw)) {
+        return [];
+    }
+    $out = [];
+    foreach ($raw as $row) {
+        if (is_array($row) && !empty($row['id']) && is_string($row['id'])) {
+            $out[] = $row;
+        }
+    }
+    return $out;
+}