- 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/Config.php

@@ -81,6 +81,12 @@ final class Config
     {
         $configured = trim((string) $this->get('base_url', ''));
         if ($configured !== '') {
+            $parts = parse_url($configured);
+            if (is_array($parts) && isset($parts['scheme'], $parts['host'])) {
+                $port = isset($parts['port']) ? ':' . $parts['port'] : '';
+                return $parts['scheme'] . '://' . $parts['host'] . $port;
+            }
+
             return rtrim($configured, '/');
         }
 
@@ -96,6 +102,34 @@ final class Config
         return $scheme . '://' . $host;
     }
 
+    public function basePath(): string
+    {
+        $configured = trim((string) $this->get('base_path', ''));
+        if ($configured !== '') {
+            return self::normalizeBasePath($configured);
+        }
+
+        $baseUrl = trim((string) $this->get('base_url', ''));
+        if ($baseUrl !== '') {
+            $path = parse_url($baseUrl, PHP_URL_PATH);
+            if (is_string($path) && $path !== '') {
+                return self::normalizeBasePath($path);
+            }
+        }
+
+        if (PHP_SAPI === 'cli') {
+            return '';
+        }
+
+        $scriptName = str_replace('\\', '/', (string) ($_SERVER['SCRIPT_NAME'] ?? ''));
+        $scriptDir = dirname($scriptName);
+        if ($scriptDir === '.' || $scriptDir === '/') {
+            return '';
+        }
+
+        return self::normalizeBasePath($scriptDir);
+    }
+
     /** @return array<string, mixed> */
     private static function defaults(): array
     {
@@ -108,6 +142,7 @@ final class Config
                 'language' => 'en',
             ],
             'base_url' => '',
+            'base_path' => '',
             'timezone' => 'UTC',
             'theme' => 'neon',
             'posts_per_page' => 6,
@@ -124,4 +159,10 @@ final class Config
             'social' => [],
         ];
     }
+
+    private static function normalizeBasePath(string $path): string
+    {
+        $path = '/' . trim($path, '/');
+        return $path === '/' ? '' : $path;
+    }
 }