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/removeComments.js

@@ -1,11 +1,18 @@
-'use strict';
+import { detachNodeFromParent } from '../lib/xast.js';
 
-const { detachNodeFromParent } = require('../lib/xast.js');
+/**
+ * @typedef RemoveCommentsParams
+ * @property {ReadonlyArray<RegExp | string> | false=} preservePatterns
+ */
 
-exports.name = 'removeComments';
-exports.type = 'visitor';
-exports.active = true;
-exports.description = 'removes comments';
+export const name = 'removeComments';
+export const description = 'removes comments';
+
+/**
+ * If a comment matches one of the following patterns, it will be
+ * preserved by default. Particularly for copyright/license information.
+ */
+const DEFAULT_PRESERVE_PATTERNS = [/^!/];
 
 /**
  * Remove comments.
@@ -16,15 +23,31 @@ exports.description = 'removes comments';
  *
  * @author Kir Belevich
  *
- * @type {import('../lib/types').Plugin<void>}
+ * @type {import('../lib/types.js').Plugin<RemoveCommentsParams>}
  */
-exports.fn = () => {
+export const fn = (_root, params) => {
+  const { preservePatterns = DEFAULT_PRESERVE_PATTERNS } = params;
+
   return {
     comment: {
       enter: (node, parentNode) => {
-        if (node.value.charAt(0) !== '!') {
-          detachNodeFromParent(node, parentNode);
+        if (preservePatterns) {
+          if (!Array.isArray(preservePatterns)) {
+            throw Error(
+              `Expected array in removeComments preservePatterns parameter but received ${preservePatterns}`,
+            );
+          }
+
+          const matches = preservePatterns.some((pattern) => {
+            return new RegExp(pattern).test(node.value);
+          });
+
+          if (matches) {
+            return;
+          }
         }
+
+        detachNodeFromParent(node, parentNode);
       },
     },
   };