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/Atrule.js

@@ -1,23 +1,22 @@
-var TYPE = require('../../tokenizer').TYPE;
-var rawMode = require('./Raw').mode;
+import {
+    AtKeyword,
+    Semicolon,
+    LeftCurlyBracket,
+    RightCurlyBracket
+} from '../../tokenizer/index.js';
 
-var ATKEYWORD = TYPE.AtKeyword;
-var SEMICOLON = TYPE.Semicolon;
-var LEFTCURLYBRACKET = TYPE.LeftCurlyBracket;
-var RIGHTCURLYBRACKET = TYPE.RightCurlyBracket;
-
-function consumeRaw(startToken) {
-    return this.Raw(startToken, rawMode.leftCurlyBracketOrSemicolon, true);
+function consumeRaw() {
+    return this.Raw(this.consumeUntilLeftCurlyBracketOrSemicolon, true);
 }
 
 function isDeclarationBlockAtrule() {
-    for (var offset = 1, type; type = this.scanner.lookupType(offset); offset++) {
-        if (type === RIGHTCURLYBRACKET) {
+    for (let offset = 1, type; type = this.lookupType(offset); offset++) {
+        if (type === RightCurlyBracket) {
             return true;
         }
 
-        if (type === LEFTCURLYBRACKET ||
-            type === ATKEYWORD) {
+        if (type === LeftCurlyBracket ||
+            type === AtKeyword) {
             return false;
         }
     }
@@ -25,83 +24,77 @@ function isDeclarationBlockAtrule() {
     return false;
 }
 
-module.exports = {
-    name: 'Atrule',
-    structure: {
-        name: String,
-        prelude: ['AtrulePrelude', 'Raw', null],
-        block: ['Block', null]
-    },
-    parse: function() {
-        var start = this.scanner.tokenStart;
-        var name;
-        var nameLowerCase;
-        var prelude = null;
-        var block = null;
 
-        this.eat(ATKEYWORD);
+export const name = 'Atrule';
+export const walkContext = 'atrule';
+export const structure = {
+    name: String,
+    prelude: ['AtrulePrelude', 'Raw', null],
+    block: ['Block', null]
+};
 
-        name = this.scanner.substrToCursor(start + 1);
-        nameLowerCase = name.toLowerCase();
-        this.scanner.skipSC();
+export function parse(isDeclaration = false) {
+    const start = this.tokenStart;
+    let name;
+    let nameLowerCase;
+    let prelude = null;
+    let block = null;
 
-        // parse prelude
-        if (this.scanner.eof === false &&
-            this.scanner.tokenType !== LEFTCURLYBRACKET &&
-            this.scanner.tokenType !== SEMICOLON) {
-            if (this.parseAtrulePrelude) {
-                prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name), consumeRaw);
+    this.eat(AtKeyword);
 
-                // turn empty AtrulePrelude into null
-                if (prelude.type === 'AtrulePrelude' && prelude.children.head === null) {
-                    prelude = null;
-                }
+    name = this.substrToCursor(start + 1);
+    nameLowerCase = name.toLowerCase();
+    this.skipSC();
+
+    // parse prelude
+    if (this.eof === false &&
+        this.tokenType !== LeftCurlyBracket &&
+        this.tokenType !== Semicolon) {
+        if (this.parseAtrulePrelude) {
+            prelude = this.parseWithFallback(this.AtrulePrelude.bind(this, name, isDeclaration), consumeRaw);
+        } else {
+            prelude = consumeRaw.call(this, this.tokenIndex);
+        }
+
+        this.skipSC();
+    }
+
+    switch (this.tokenType) {
+        case Semicolon:
+            this.next();
+            break;
+
+        case LeftCurlyBracket:
+            if (hasOwnProperty.call(this.atrule, nameLowerCase) &&
+                typeof this.atrule[nameLowerCase].block === 'function') {
+                block = this.atrule[nameLowerCase].block.call(this, isDeclaration);
             } else {
-                prelude = consumeRaw.call(this, this.scanner.tokenIndex);
+                // TODO: should consume block content as Raw?
+                block = this.Block(isDeclarationBlockAtrule.call(this));
             }
 
-            this.scanner.skipSC();
-        }
+            break;
+    }
 
-        switch (this.scanner.tokenType) {
-            case SEMICOLON:
-                this.scanner.next();
-                break;
+    return {
+        type: 'Atrule',
+        loc: this.getLocation(start, this.tokenStart),
+        name,
+        prelude,
+        block
+    };
+}
 
-            case LEFTCURLYBRACKET:
-                if (this.atrule.hasOwnProperty(nameLowerCase) &&
-                    typeof this.atrule[nameLowerCase].block === 'function') {
-                    block = this.atrule[nameLowerCase].block.call(this);
-                } else {
-                    // TODO: should consume block content as Raw?
-                    block = this.Block(isDeclarationBlockAtrule.call(this));
-                }
+export function generate(node) {
+    this.token(AtKeyword, '@' + node.name);
 
-                break;
-        }
+    if (node.prelude !== null) {
+        this.node(node.prelude);
+    }
 
-        return {
-            type: 'Atrule',
-            loc: this.getLocation(start, this.scanner.tokenStart),
-            name: name,
-            prelude: prelude,
-            block: block
-        };
-    },
-    generate: function(node) {
-        this.chunk('@');
-        this.chunk(node.name);
-
-        if (node.prelude !== null) {
-            this.chunk(' ');
-            this.node(node.prelude);
-        }
-
-        if (node.block) {
-            this.node(node.block);
-        } else {
-            this.chunk(';');
-        }
-    },
-    walkContext: 'atrule'
-};
+    if (node.block) {
+        this.node(node.block);
+    } else {
+        this.token(Semicolon, ';');
+    }
+}