ui: content-sized label column in decoded field tables (v2.7.14)

The decoded view used a fixed 10rem right-aligned label column, so short
labels pushed the values ~168px to the right — for transparent files the
block looked like indented record data.  efRenderFieldsHtml now uses a
grid with grid-template-columns: max-content 1fr: labels stay right
aligned and values stay aligned, but the column is only as wide as the
widest label of the block.  Applies to the file manager decoded view and
the snapshot Decoded block (transparent and per-record fields alike).

- tests: efRenderFieldsHtml markup (grid, no w-40) and decoded view.

frontend/index.html

@@ -1413,7 +1413,7 @@
 // ===== Version =====
 // Single source of truth for the PWA version: shown in the header and used
 // by the server version check in pysimConnect().
-const SIMPLE_VERSION = '2.7.13';
+const SIMPLE_VERSION = '2.7.14';
 document.getElementById('app-version').textContent = 'v' + SIMPLE_VERSION;
 
 // ===== Tab switching =====
@@ -12634,13 +12634,15 @@ function efDataSummary(data) {
 	return '';
 }
 
+// Decoded field rows: the label column is sized to its content (grid
+// max-content) instead of a fixed width, so values start right after the
+// widest label and short labels do not push the data far to the right.
 function efRenderFieldsHtml(rows) {
 	if (!rows.length) return '<span class="text-gray-400">' + esc(t('No decodable fields')) + '</span>';
-	let html = '<div class="text-xs">';
+	let html = '<div class="text-xs" style="display:grid;grid-template-columns:max-content 1fr;column-gap:0.5rem;row-gap:0.125rem">';
 	for (const [k, v] of rows) {
-		html += '<div class="flex gap-2 mb-0.5">' +
-			'<span class="w-40 shrink-0 text-right text-gray-500 dark:text-slate-400 break-all">' + esc(k) + '</span>' +
-			'<span class="font-mono break-all">' + esc(v) + '</span></div>';
+		html += '<span class="text-right text-gray-500 dark:text-slate-400 break-all">' + esc(k) + '</span>' +
+			'<span class="font-mono break-all">' + esc(v) + '</span>';
 	}
 	return html + '</div>';
 }