Make snippet count dynamic via build-time {{snippetCount}} placeholder

index.html now uses {{snippetCount}} placeholders in 4 places (ld+json,
hero badge, section badge, stats bar). generate.py replaces them with
the actual count during build. No more manual updates when adding or
removing slugs.

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

Author: brunoborges

generate.py

@@ -235,6 +235,16 @@ def main():
 
     print(f"Rebuilt data/snippets.json with {len(snippets_list)} entries")
 
+    # Patch index.html with the current snippet count
+    count = len(all_snippets)
+    with open("index.html") as f:
+        index_content = f.read()
+    index_content = index_content.replace("{{snippetCount}}", str(count))
+    with open("index.html", "w") as f:
+        f.write(index_content)
+
+    print(f"Patched index.html with snippet count: {count}")
+
 
 if __name__ == "__main__":
     main()

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": 85,
+      "numberOfItems": {{snippetCount}},
       "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">✦ 85 modern patterns · Java 8 → Java 25</div>
+    <div class="hero-badge">✦ {{snippetCount}} 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">85 snippets</span>
+      <span class="section-badge">{{snippetCount}} 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">85</div>
+      <div class="number orange">{{snippetCount}}</div>
       <div class="label">Modern Patterns</div>
     </div>
     <div class="stat-card">