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/csso/lib/restructure/prepare/processSelector.js

@@ -1,36 +1,35 @@
-var generate = require('css-tree').generate;
-var specificity = require('./specificity');
+import { generate } from 'css-tree';
+import specificity from './specificity.js';
 
-var nonFreezePseudoElements = {
-    'first-letter': true,
-    'first-line': true,
-    'after': true,
-    'before': true
-};
-var nonFreezePseudoClasses = {
-    'link': true,
-    'visited': true,
-    'hover': true,
-    'active': true,
-    'first-letter': true,
-    'first-line': true,
-    'after': true,
-    'before': true
-};
+const nonFreezePseudoElements = new Set([
+    'first-letter',
+    'first-line',
+    'after',
+    'before'
+]);
+const nonFreezePseudoClasses = new Set([
+    'link',
+    'visited',
+    'hover',
+    'active',
+    'first-letter',
+    'first-line',
+    'after',
+    'before'
+]);
 
-module.exports = function freeze(node, usageData) {
-    var pseudos = Object.create(null);
-    var hasPseudo = false;
+export default function processSelector(node, usageData) {
+    const pseudos = new Set();
 
-    node.prelude.children.each(function(simpleSelector) {
-        var tagName = '*';
-        var scope = 0;
+    node.prelude.children.forEach(function(simpleSelector) {
+        let tagName = '*';
+        let scope = 0;
 
-        simpleSelector.children.each(function(node) {
+        simpleSelector.children.forEach(function(node) {
             switch (node.type) {
                 case 'ClassSelector':
                     if (usageData && usageData.scopes) {
-                        var classScope = usageData.scopes[node.name] || 0;
+                        const classScope = usageData.scopes[node.name] || 0;
 
                         if (scope !== 0 && classScope !== scope) {
                             throw new Error('Selector can\'t has classes from different scopes: ' + generate(simpleSelector));
@@ -38,25 +37,28 @@ module.exports = function freeze(node, usageData) {
 
                         scope = classScope;
                     }
+
                     break;
 
-                case 'PseudoClassSelector':
-                    var name = node.name.toLowerCase();
+                case 'PseudoClassSelector': {
+                    const name = node.name.toLowerCase();
 
-                    if (!nonFreezePseudoClasses.hasOwnProperty(name)) {
-                        pseudos[':' + name] = true;
-                        hasPseudo = true;
+                    if (!nonFreezePseudoClasses.has(name)) {
+                        pseudos.add(`:${name}`);
                     }
+
                     break;
+                }
 
-                case 'PseudoElementSelector':
-                    var name = node.name.toLowerCase();
+                case 'PseudoElementSelector': {
+                    const name = node.name.toLowerCase();
 
-                    if (!nonFreezePseudoElements.hasOwnProperty(name)) {
-                        pseudos['::' + name] = true;
-                        hasPseudo = true;
+                    if (!nonFreezePseudoElements.has(name)) {
+                        pseudos.add(`::${name}`);
                     }
+
                     break;
+                }
 
                 case 'TypeSelector':
                     tagName = node.name.toLowerCase();
@@ -64,12 +66,11 @@ module.exports = function freeze(node, usageData) {
 
                 case 'AttributeSelector':
                     if (node.flags) {
-                        pseudos['[' + node.flags.toLowerCase() + ']'] = true;
-                        hasPseudo = true;
+                        pseudos.add(`[${node.flags.toLowerCase()}]`);
                     }
+
                     break;
 
-                case 'WhiteSpace':
                 case 'Combinator':
                     tagName = '*';
                     break;
@@ -90,5 +91,7 @@ module.exports = function freeze(node, usageData) {
     });
 
     // add property to all rule nodes to avoid multiple hidden class
-    node.pseudoSignature = hasPseudo && Object.keys(pseudos).sort().join(',');
+    node.pseudoSignature = pseudos.size > 0
+        ? [...pseudos].sort().join(',')
+        : false;
 };