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/css-tree/lib/syntax/node/StyleSheet.js

@@ -1,81 +1,82 @@
-var TYPE = require('../../tokenizer').TYPE;
+import {
+    WhiteSpace,
+    Comment,
+    AtKeyword,
+    CDO,
+    CDC
+} from '../../tokenizer/index.js';
 
-var WHITESPACE = TYPE.WhiteSpace;
-var COMMENT = TYPE.Comment;
-var ATKEYWORD = TYPE.AtKeyword;
-var CDO = TYPE.CDO;
-var CDC = TYPE.CDC;
-var EXCLAMATIONMARK = 0x0021; // U+0021 EXCLAMATION MARK (!)
+const EXCLAMATIONMARK = 0x0021; // U+0021 EXCLAMATION MARK (!)
 
-function consumeRaw(startToken) {
-    return this.Raw(startToken, null, false);
+function consumeRaw() {
+    return this.Raw(null, false);
 }
 
-module.exports = {
-    name: 'StyleSheet',
-    structure: {
-        children: [[
-            'Comment',
-            'CDO',
-            'CDC',
-            'Atrule',
-            'Rule',
-            'Raw'
-        ]]
-    },
-    parse: function() {
-        var start = this.scanner.tokenStart;
-        var children = this.createList();
-        var child;
+export const name = 'StyleSheet';
+export const walkContext = 'stylesheet';
+export const structure = {
+    children: [[
+        'Comment',
+        'CDO',
+        'CDC',
+        'Atrule',
+        'Rule',
+        'Raw'
+    ]]
+};
 
-        scan:
-        while (!this.scanner.eof) {
-            switch (this.scanner.tokenType) {
-                case WHITESPACE:
-                    this.scanner.next();
+export function parse() {
+    const start = this.tokenStart;
+    const children = this.createList();
+    let child;
+
+    scan:
+    while (!this.eof) {
+        switch (this.tokenType) {
+            case WhiteSpace:
+                this.next();
+                continue;
+
+            case Comment:
+                // ignore comments except exclamation comments (i.e. /*! .. */) on top level
+                if (this.charCodeAt(this.tokenStart + 2) !== EXCLAMATIONMARK) {
+                    this.next();
                     continue;
+                }
 
-                case COMMENT:
-                    // ignore comments except exclamation comments (i.e. /*! .. */) on top level
-                    if (this.scanner.source.charCodeAt(this.scanner.tokenStart + 2) !== EXCLAMATIONMARK) {
-                        this.scanner.next();
-                        continue;
-                    }
+                child = this.Comment();
+                break;
 
-                    child = this.Comment();
-                    break;
+            case CDO: // <!--
+                child = this.CDO();
+                break;
 
-                case CDO: // <!--
-                    child = this.CDO();
-                    break;
+            case CDC: // -->
+                child = this.CDC();
+                break;
 
-                case CDC: // -->
-                    child = this.CDC();
-                    break;
+            // CSS Syntax Module Level 3
+            // §2.2 Error handling
+            // At the "top level" of a stylesheet, an <at-keyword-token> starts an at-rule.
+            case AtKeyword:
+                child = this.parseWithFallback(this.Atrule, consumeRaw);
+                break;
 
-                // CSS Syntax Module Level 3
-                // §2.2 Error handling
-                // At the "top level" of a stylesheet, an <at-keyword-token> starts an at-rule.
-                case ATKEYWORD:
-                    child = this.parseWithFallback(this.Atrule, consumeRaw);
-                    break;
-
-                // Anything else starts a qualified rule ...
-                default:
-                    child = this.parseWithFallback(this.Rule, consumeRaw);
-            }
-
-            children.push(child);
+            // Anything else starts a qualified rule ...
+            default:
+                child = this.parseWithFallback(this.Rule, consumeRaw);
         }
 
-        return {
-            type: 'StyleSheet',
-            loc: this.getLocation(start, this.scanner.tokenStart),
-            children: children
-        };
-    },
-    generate: function(node) {
-        this.children(node);
-    },
-    walkContext: 'stylesheet'
-};
+        children.push(child);
+    }
+
+    return {
+        type: 'StyleSheet',
+        loc: this.getLocation(start, this.tokenStart),
+        children
+    };
+}
+
+export function generate(node) {
+    this.children(node);
+}