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/replace/property/background.js

@@ -1,17 +1,7 @@
-var List = require('css-tree').List;
-
-module.exports = function compressBackground(node) {
-    function lastType() {
-        if (buffer.length) {
-            return buffer[buffer.length - 1].type;
-        }
-    }
+import { List } from 'css-tree';
 
+export default function compressBackground(node) {
     function flush() {
-        if (lastType() === 'WhiteSpace') {
-            buffer.pop();
-        }
-
         if (!buffer.length) {
             buffer.unshift(
                 {
@@ -19,10 +9,6 @@ module.exports = function compressBackground(node) {
                     loc: null,
                     value: '0'
                 },
-                {
-                    type: 'WhiteSpace',
-                    value: ' '
-                },
                 {
                     type: 'Number',
                     loc: null,
@@ -36,10 +22,10 @@ module.exports = function compressBackground(node) {
         buffer = [];
     }
 
-    var newValue = [];
-    var buffer = [];
+    let newValue = [];
+    let buffer = [];
 
-    node.children.each(function(node) {
+    node.children.forEach((node) => {
         if (node.type === 'Operator' && node.value === ',') {
             flush();
             newValue.push(node);
@@ -56,11 +42,6 @@ module.exports = function compressBackground(node) {
             }
         }
 
-        // don't add redundant spaces
-        if (node.type === 'WhiteSpace' && (!buffer.length || lastType() === 'WhiteSpace')) {
-            return;
-        }
-
         buffer.push(node);
     });
 

node_modules/csso/lib/replace/property/border.js

@@ -1,20 +1,5 @@
-function removeItemAndRedundantWhiteSpace(list, item) {
-    var prev = item.prev;
-    var next = item.next;
-
-    if (next !== null) {
-        if (next.data.type === 'WhiteSpace' && (prev === null || prev.data.type === 'WhiteSpace')) {
-            list.remove(next);
-        }
-    } else if (prev !== null && prev.data.type === 'WhiteSpace') {
-        list.remove(prev);
-    }
-
-    list.remove(item);
-}
-
-module.exports = function compressBorder(node) {
-    node.children.each(function(node, item, list) {
+export default function compressBorder(node) {
+    node.children.forEach((node, item, list) => {
         if (node.type === 'Identifier' && node.name.toLowerCase() === 'none') {
             if (list.head === list.tail) {
                 // replace `none` for zero when `none` is a single term
@@ -24,7 +9,7 @@ module.exports = function compressBorder(node) {
                     value: '0'
                 };
             } else {
-                removeItemAndRedundantWhiteSpace(list, item);
+                list.remove(item);
             }
         }
     });

node_modules/csso/lib/replace/property/font-weight.js

@@ -1,5 +1,5 @@
-module.exports = function compressFontWeight(node) {
-    var value = node.children.head.data;
+export default function compressFontWeight(node) {
+    const value = node.children.head.data;
 
     if (value.type === 'Identifier') {
         switch (value.name) {

node_modules/csso/lib/replace/property/font.js

@@ -1,7 +1,7 @@
-module.exports = function compressFont(node) {
-    var list = node.children;
+export default function compressFont(node) {
+    const list = node.children;
 
-    list.eachRight(function(node, item) {
+    list.forEachRight(function(node, item) {
         if (node.type === 'Identifier') {
             if (node.name === 'bold') {
                 item.data = {
@@ -10,33 +10,18 @@ module.exports = function compressFont(node) {
                     value: '700'
                 };
             } else if (node.name === 'normal') {
-                var prev = item.prev;
+                const prev = item.prev;
 
                 if (prev && prev.data.type === 'Operator' && prev.data.value === '/') {
                     this.remove(prev);
                 }
 
                 this.remove(item);
-            } else if (node.name === 'medium') {
-                var next = item.next;
-
-                if (!next || next.data.type !== 'Operator') {
-                    this.remove(item);
-                }
             }
         }
     });
 
-    // remove redundant spaces
-    list.each(function(node, item) {
-        if (node.type === 'WhiteSpace') {
-            if (!item.prev || !item.next || item.next.data.type === 'WhiteSpace') {
-                this.remove(item);
-            }
-        }
-    });
-
-    if (list.isEmpty()) {
+    if (list.isEmpty) {
         list.insert(list.createItem({
             type: 'Identifier',
             name: 'normal'