feat(ui): improve configuration changes modal

app/Services/DeploymentConfiguration/Concerns/SummarizesDiffText.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Services\DeploymentConfiguration\Concerns;
+
+trait SummarizesDiffText
+{
+    /**
+     * Maximum length of a single-line value before it is truncated/considered
+     * worth expanding. Kept as one constant so the snapshot summary and the
+     * differ's expand decision never drift apart.
+     */
+    private const SINGLE_LINE_LIMIT = 120;
+
+    /**
+     * Returns the value only when it is worth expanding (multi-line or longer
+     * than the single-line truncation limit). Otherwise null.
+     */
+    private function expandableText(?string $value): ?string
+    {
+        if (blank($value)) {
+            return null;
+        }
+
+        $value = trim((string) $value);
+
+        if (str_contains($value, "\n") || mb_strlen($value) > self::SINGLE_LINE_LIMIT) {
+            return $value;
+        }
+
+        return null;
+    }
+}