added terminal interface as default. old website as no-js fallback

terminal/api/menu.php

@@ -0,0 +1,58 @@
+<?php
+declare(strict_types=1);
+
+require __DIR__ . '/terminal/_bootstrap.php';
+
+$file = $rootDir . '/includes/sidebar.md';
+if (!is_file($file)) {
+    json_out(['sections' => []]);
+}
+
+$md = file_get_contents($file);
+if ($md === false) {
+    json_out(['sections' => []]);
+}
+
+$lines = preg_split('/\r\n|\n|\r/', $md) ?: [];
+$sections = [];
+
+$current = null;
+
+foreach ($lines as $line) {
+    $raw = rtrim($line);
+
+    // Section header: "-   Title"
+    if (preg_match('/^\-\s{2,}(.+)$/', $raw, $m)) {
+        if ($current !== null) {
+            $sections[] = $current;
+        }
+        $current = [
+            'title' => trim($m[1]),
+            'items' => [],
+        ];
+        continue;
+    }
+
+    // Menu item: "    -   [Text](Href)"
+    if ($current !== null && preg_match('/^\s+\-\s{2,}\[(.+?)\]\((.+?)\)\s*$/', $raw, $m)) {
+        $text = trim($m[1]);
+        $href = trim($m[2]);
+
+        $internal = str_starts_with($href, '/');
+        $slug = $internal ? ltrim(parse_url($href, PHP_URL_PATH) ?? '', '/') : '';
+
+        $current['items'][] = [
+            'text' => $text,
+            'href' => $href,
+            'internal' => $internal,
+            'slug' => $slug,
+        ];
+        continue;
+    }
+}
+
+if ($current !== null) {
+    $sections[] = $current;
+}
+
+json_out(['sections' => $sections]);