Fix code quality violations and exclude Manifest from checks

Document application modes (development/debug/production)
Add global file drop handler, order column normalization, SPA hash fix
Serve CDN assets via /_vendor/ URLs instead of merging into bundles
Add production minification with license preservation
Improve JSON formatting for debugging and production optimization
Add CDN asset caching with CSS URL inlining for production builds
Add three-mode system (development, debug, production)
Update Manifest CLAUDE.md to reflect helper class architecture
Refactor Manifest.php into helper classes for better organization
Pre-manifest-refactor checkpoint: Add app_mode documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/svgo/plugins/sortDefsChildren.js

@@ -1,26 +1,21 @@
-'use strict';
-
-exports.type = 'visitor';
-exports.name = 'sortDefsChildren';
-exports.active = true;
-exports.description = 'Sorts children of <defs> to improve compression';
+export const name = 'sortDefsChildren';
+export const description = 'Sorts children of <defs> to improve compression';
 
 /**
- * Sorts children of defs in order to improve compression.
- * Sorted first by frequency then by element name length then by element name (to ensure grouping).
+ * Sorts children of defs in order to improve compression. Sorted first by
+ * frequency then by element name length then by element name (to ensure
+ * grouping).
  *
  * @author David Leston
  *
- * @type {import('../lib/types').Plugin<void>}
+ * @type {import('../lib/types.js').Plugin}
  */
-exports.fn = () => {
+export const fn = () => {
   return {
     element: {
       enter: (node) => {
         if (node.name === 'defs') {
-          /**
-           * @type {Map<string, number>}
-           */
+          /** @type {Map<string, number>} */
           const frequencies = new Map();
           for (const child of node.children) {
             if (child.type === 'element') {