- Fixed the subdirectory loading issue.

Changed:
[app/View.php](/Users/tyemeclifford/Documents/GH/blog/app/View.php): 
generated URLs now honor a base path like /blog.
[app/Config.php](/Users/tyemeclifford/Documents/GH/blog/app/Config.php): 
added base_path support and derives it from base_url or SCRIPT_NAME.
[app/App.php](/Users/tyemeclifford/Documents/GH/blog/app/App.php): route 
parsing strips the base path, and PHP can safely serve theme/upload 
assets for virtual subdirectory previews.
[.htaccess](/Users/tyemeclifford/Documents/GH/blog/.htaccess): removed 
hardcoded RewriteBase /.
[themes/neon/layout.php](/Users/tyemeclifford/Documents/GH/blog/themes/neon/layout.php): 
root-relative social links like /feed.xml now become /blog/feed.xml.
[README.md](/Users/tyemeclifford/Documents/GH/blog/README.md): 
documented subdirectory setup.

app/View.php

@@ -5,6 +5,14 @@ namespace NeonBlog;
 
 final class View
 {
+    private static string $basePath = '';
+
+    public static function setBasePath(string $basePath): void
+    {
+        $basePath = '/' . trim($basePath, '/');
+        self::$basePath = $basePath === '/' ? '' : $basePath;
+    }
+
     public static function e(mixed $value): string
     {
         return htmlspecialchars((string) $value, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
@@ -18,7 +26,12 @@ final class View
             $path = rtrim($path, '/');
         }
 
-        return $query === [] ? $path : $path . '?' . http_build_query($query);
+        $url = self::$basePath . $path;
+        if ($url === '') {
+            $url = '/';
+        }
+
+        return $query === [] ? $url : $url . '?' . http_build_query($query);
     }
 
     /** @param array<string, mixed> $item */