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/clean/Atrule.js

@@ -1,7 +1,7 @@
-var resolveKeyword = require('css-tree').keyword;
-var { hasNoChildren } = require('./utils');
+import { keyword as resolveKeyword } from 'css-tree';
+import { hasNoChildren } from './utils.js';
 
-module.exports = function cleanAtrule(node, item, list) {
+export default function cleanAtrule(node, item, list) {
     if (node.block) {
         // otherwise removed at-rule don't prevent @import for removal
         if (this.stylesheet !== null) {
@@ -46,13 +46,15 @@ module.exports = function cleanAtrule(node, item, list) {
 
                 this.root.firstAtrulesAllowed = false;
                 list.remove(item);
+
                 return true;
             }, this);
 
             break;
 
-        default:
-            var name = resolveKeyword(node.name).basename;
+        default: {
+            const name = resolveKeyword(node.name).basename;
+
             if (name === 'keyframes' ||
                 name === 'media' ||
                 name === 'supports') {
@@ -62,5 +64,6 @@ module.exports = function cleanAtrule(node, item, list) {
                     list.remove(item);
                 }
             }
+        }
     }
 };

node_modules/csso/lib/clean/Comment.js

@@ -1,3 +1,3 @@
-module.exports = function cleanComment(data, item, list) {
+export default function cleanComment(data, item, list) {
     list.remove(item);
 };

node_modules/csso/lib/clean/Declaration.js

@@ -1,7 +1,7 @@
-var property = require('css-tree').property;
+import { property } from 'css-tree';
 
-module.exports = function cleanDeclartion(node, item, list) {
-    if (node.value.children && node.value.children.isEmpty()) {
+export default function cleanDeclartion(node, item, list) {
+    if (node.value.children && node.value.children.isEmpty) {
         list.remove(item);
         return;
     }

node_modules/csso/lib/clean/Raw.js

@@ -1,6 +1,6 @@
-var { isNodeChildrenList } = require('./utils');
+import { isNodeChildrenList } from './utils.js';
 
-module.exports = function cleanRaw(node, item, list) {
+export default function cleanRaw(node, item, list) {
     // raw in stylesheet or block children
     if (isNodeChildrenList(this.stylesheet, list) ||
         isNodeChildrenList(this.block, list)) {

node_modules/csso/lib/clean/Rule.js

@@ -1,10 +1,12 @@
-var hasOwnProperty = Object.prototype.hasOwnProperty;
-var walk = require('css-tree').walk;
-var { hasNoChildren } = require('./utils');
+import { walk, keyword } from 'css-tree';
+import { hasNoChildren } from './utils.js';
+
+const { hasOwnProperty } = Object.prototype;
+const skipUsageFilteringAtrule = new Set(['keyframes']);
 
 function cleanUnused(selectorList, usageData) {
-    selectorList.children.each(function(selector, item, list) {
-        var shouldRemove = false;
+    selectorList.children.forEach((selector, item, list) => {
+        let shouldRemove = false;
 
         walk(selector, function(node) {
             // ignore nodes in nested selectors
@@ -71,19 +73,24 @@ function cleanUnused(selectorList, usageData) {
         }
     });
 
-    return selectorList.children.isEmpty();
+    return selectorList.children.isEmpty;
 }
 
-module.exports = function cleanRule(node, item, list, options) {
+export default function cleanRule(node, item, list, options) {
     if (hasNoChildren(node.prelude) || hasNoChildren(node.block)) {
         list.remove(item);
         return;
     }
 
-    var usageData = options.usage;
+    // avoid usage filtering for some at-rules
+    if (this.atrule && skipUsageFilteringAtrule.has(keyword(this.atrule.name).basename)) {
+        return;
+    }
 
-    if (usageData && (usageData.whitelist !== null || usageData.blacklist !== null)) {
-        cleanUnused(node.prelude, usageData);
+    const { usage } = options;
+
+    if (usage && (usage.whitelist !== null || usage.blacklist !== null)) {
+        cleanUnused(node.prelude, usage);
 
         if (hasNoChildren(node.prelude)) {
             list.remove(item);

node_modules/csso/lib/clean/TypeSelector.js

@@ -1,6 +1,6 @@
 // remove useless universal selector
-module.exports = function cleanTypeSelector(node, item, list) {
-    var name = item.data.name;
+export default function cleanTypeSelector(node, item, list) {
+    const name = item.data.name;
 
     // check it's a non-namespaced universal selector
     if (name !== '*') {
@@ -8,7 +8,7 @@ module.exports = function cleanTypeSelector(node, item, list) {
     }
 
     // remove when universal selector before other selectors
-    var nextType = item.next && item.next.data.type;
+    const nextType = item.next && item.next.data.type;
     if (nextType === 'IdSelector' ||
         nextType === 'ClassSelector' ||
         nextType === 'AttributeSelector' ||

node_modules/csso/lib/clean/WhiteSpace.js

@@ -1,30 +1,3 @@
-var { isNodeChildrenList } = require('./utils');
-
-function isSafeOperator(node) {
-    return node.type === 'Operator' && node.value !== '+' && node.value !== '-';
-}
-
-module.exports = function cleanWhitespace(node, item, list) {
-    // remove when first or last item in sequence
-    if (item.next === null || item.prev === null) {
-        list.remove(item);
-        return;
-    }
-
-    // white space in stylesheet or block children
-    if (isNodeChildrenList(this.stylesheet, list) ||
-        isNodeChildrenList(this.block, list)) {
-        list.remove(item);
-        return;
-    }
-
-    if (item.next.data.type === 'WhiteSpace') {
-        list.remove(item);
-        return;
-    }
-
-    if (isSafeOperator(item.prev.data) || isSafeOperator(item.next.data)) {
-        list.remove(item);
-        return;
-    }
+export default function cleanWhitespace(node, item, list) {
+    list.remove(item);
 };

node_modules/csso/lib/clean/index.js

@@ -1,17 +1,25 @@
-var walk = require('css-tree').walk;
-var handlers = {
-    Atrule: require('./Atrule'),
-    Comment: require('./Comment'),
-    Declaration: require('./Declaration'),
-    Raw: require('./Raw'),
-    Rule: require('./Rule'),
-    TypeSelector: require('./TypeSelector'),
-    WhiteSpace: require('./WhiteSpace')
+import { walk } from 'css-tree';
+import Atrule from './Atrule.js';
+import Comment from './Comment.js';
+import Declaration from './Declaration.js';
+import Raw from './Raw.js';
+import Rule from './Rule.js';
+import TypeSelector from './TypeSelector.js';
+import WhiteSpace from './WhiteSpace.js';
+
+const handlers = {
+    Atrule,
+    Comment,
+    Declaration,
+    Raw,
+    Rule,
+    TypeSelector,
+    WhiteSpace
 };
 
-module.exports = function(ast, options) {
+export default function(ast, options) {
     walk(ast, {
-        leave: function(node, item, list) {
+        leave(node, item, list) {
             if (handlers.hasOwnProperty(node.type)) {
                 handlers[node.type].call(this, node, item, list, options);
             }

node_modules/csso/lib/clean/utils.js

@@ -1,8 +1,7 @@
-module.exports = {
-    hasNoChildren: function(node) {
-        return !node || !node.children || node.children.isEmpty();
-    },
-    isNodeChildrenList: function(node, list) {
-        return node !== null && node.children === list;
-    }
-};
+export function hasNoChildren(node) {
+    return !node || !node.children || node.children.isEmpty;
+}
+
+export function isNodeChildrenList(node, list) {
+    return node !== null && node.children === list;
+}