Remove duplicate CATEGORIES list, use SequencedMap for CATEGORY_DISPLAY

Replace separate CATEGORIES List and CATEGORY_DISPLAY Map with a single
SequencedMap that provides both ordered iteration and display name lookup.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: brunoborges

Generate.java

@@ -36,21 +36,22 @@
 static final Pattern TOKEN_PATTERN = Pattern.compile("\\{\\{(\\w+)}}");
 static final ObjectMapper MAPPER = new ObjectMapper();
 
-static final List<String> CATEGORIES = List.of(
-        "language", "collections", "strings", "streams", "concurrency",
-        "io", "errors", "datetime", "security", "tooling");
-
-static final Map<String, String> CATEGORY_DISPLAY = Map.ofEntries(
-        Map.entry("language", "Language"),
-        Map.entry("collections", "Collections"),
-        Map.entry("strings", "Strings"),
-        Map.entry("streams", "Streams"),
-        Map.entry("concurrency", "Concurrency"),
-        Map.entry("io", "I/O"),
-        Map.entry("errors", "Errors"),
-        Map.entry("datetime", "Date/Time"),
-        Map.entry("security", "Security"),
-        Map.entry("tooling", "Tooling"));
+static final SequencedMap<String, String> CATEGORY_DISPLAY = buildCategoryDisplay();
+
+static SequencedMap<String, String> buildCategoryDisplay() {
+    var map = new LinkedHashMap<String, String>();
+    map.put("language", "Language");
+    map.put("collections", "Collections");
+    map.put("strings", "Strings");
+    map.put("streams", "Streams");
+    map.put("concurrency", "Concurrency");
+    map.put("io", "I/O");
+    map.put("errors", "Errors");
+    map.put("datetime", "Date/Time");
+    map.put("security", "Security");
+    map.put("tooling", "Tooling");
+    return map;
+}
 
 static final Set<String> EXCLUDED_KEYS = Set.of("_path", "prev", "next", "related");
 
@@ -152,7 +153,7 @@ void main() throws IOException {
 
 SequencedMap<String, Snippet> loadAllSnippets() throws IOException {
     SequencedMap<String, Snippet> snippets = new LinkedHashMap<>();
-    for (var cat : CATEGORIES) {
+    for (var cat : CATEGORY_DISPLAY.sequencedKeySet()) {
         var catDir = Path.of(CONTENT_DIR, cat);
         if (!Files.isDirectory(catDir)) continue;
 

site/index.html

@@ -59,7 +59,7 @@
     "description": "A collection of modern Java code snippets. Every old Java pattern next to its clean, modern replacement — side by side.",
     "mainEntity": {
       "@type": "ItemList",
-      "numberOfItems": {{snippetCount}},
+      "numberOfItems": 85,
       "itemListElement": [
                 {"@type": "ListItem", "position": 1, "url": "https:\/\/javaevolved.github.io\/type-inference-with-var", "name": "Type inference with var"}
                 ,{"@type": "ListItem", "position": 2, "url": "https:\/\/javaevolved.github.io\/text-blocks-for-multiline-strings", "name": "Text blocks for multiline strings"}
@@ -168,7 +168,7 @@
   </nav>
 
   <section class="hero">
-    <div class="hero-badge">✦ {{snippetCount}} modern patterns · Java 8 → Java 25</div>
+    <div class="hero-badge">✦ 85 modern patterns · Java 8 → Java 25</div>
     <h1>Java has evolved.<br><span class="gradient">Your code can too.</span></h1>
     <p>Every old Java pattern next to its clean, modern replacement — side by side.</p>
     <a href="/language/records-for-data-classes.html" class="hero-compare">
@@ -214,7 +214,7 @@ <h1>Java has evolved.<br><span class="gradient">Your code can too.</span></h1>
   <section class="section" id="all-comparisons" style="padding-top:24px">
     <div class="section-header">
       <h2 class="section-title">All comparisons</h2>
-      <span class="section-badge">{{snippetCount}} snippets</span>
+      <span class="section-badge">85 snippets</span>
     </div>
     <div class="filter-pills" id="categoryFilter">
       <span class="filter-label">Filter:</span>
@@ -2961,7 +2961,7 @@ <h3>Default interface methods</h3>
 
   <div class="stats-bar">
     <div class="stat-card">
-      <div class="number orange">{{snippetCount}}</div>
+      <div class="number orange">85</div>
       <div class="label">Modern Patterns</div>
     </div>
     <div class="stat-card">