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/Url.js

@@ -1,69 +1,52 @@
-var isWhiteSpace = require('../../tokenizer').isWhiteSpace;
-var cmpStr = require('../../tokenizer').cmpStr;
-var TYPE = require('../../tokenizer').TYPE;
+import * as url from '../../utils/url.js';
+import * as string from '../../utils/string.js';
+import {
+    Function as FunctionToken,
+    String as StringToken,
+    Url,
+    RightParenthesis
+} from '../../tokenizer/index.js';
 
-var FUNCTION = TYPE.Function;
-var URL = TYPE.Url;
-var RIGHTPARENTHESIS = TYPE.RightParenthesis;
+export const name = 'Url';
+export const structure = {
+    value: String
+};
 
 // <url-token> | <function-token> <string> )
-module.exports = {
-    name: 'Url',
-    structure: {
-        value: ['String', 'Raw']
-    },
-    parse: function() {
-        var start = this.scanner.tokenStart;
-        var value;
+export function parse() {
+    const start = this.tokenStart;
+    let value;
 
-        switch (this.scanner.tokenType) {
-            case URL:
-                var rawStart = start + 4;
-                var rawEnd = this.scanner.tokenEnd - 1;
+    switch (this.tokenType) {
+        case Url:
+            value = url.decode(this.consume(Url));
+            break;
 
-                while (rawStart < rawEnd && isWhiteSpace(this.scanner.source.charCodeAt(rawStart))) {
-                    rawStart++;
-                }
+        case FunctionToken:
+            if (!this.cmpStr(this.tokenStart, this.tokenEnd, 'url(')) {
+                this.error('Function name must be `url`');
+            }
 
-                while (rawStart < rawEnd && isWhiteSpace(this.scanner.source.charCodeAt(rawEnd - 1))) {
-                    rawEnd--;
-                }
+            this.eat(FunctionToken);
+            this.skipSC();
+            value = string.decode(this.consume(StringToken));
+            this.skipSC();
+            if (!this.eof) {
+                this.eat(RightParenthesis);
+            }
+            break;
 
-                value = {
-                    type: 'Raw',
-                    loc: this.getLocation(rawStart, rawEnd),
-                    value: this.scanner.source.substring(rawStart, rawEnd)
-                };
-
-                this.eat(URL);
-                break;
-
-            case FUNCTION:
-                if (!cmpStr(this.scanner.source, this.scanner.tokenStart, this.scanner.tokenEnd, 'url(')) {
-                    this.error('Function name must be `url`');
-                }
-
-                this.eat(FUNCTION);
-                this.scanner.skipSC();
-                value = this.String();
-                this.scanner.skipSC();
-                this.eat(RIGHTPARENTHESIS);
-                break;
-
-            default:
-                this.error('Url or Function is expected');
-        }
-
-        return {
-            type: 'Url',
-            loc: this.getLocation(start, this.scanner.tokenStart),
-            value: value
-        };
-    },
-    generate: function(node) {
-        this.chunk('url');
-        this.chunk('(');
-        this.node(node.value);
-        this.chunk(')');
+        default:
+            this.error('Url or Function is expected');
     }
-};
+
+    return {
+        type: 'Url',
+        loc: this.getLocation(start, this.tokenStart),
+        value
+    };
+}
+
+export function generate(node) {
+    this.token(Url, url.encode(node.value));
+}