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/cjs/generator/token-before.cjs

@@ -0,0 +1,170 @@
+'use strict';
+
+const types = require('../tokenizer/types.cjs');
+
+const PLUSSIGN = 0x002B;    // U+002B PLUS SIGN (+)
+const HYPHENMINUS = 0x002D; // U+002D HYPHEN-MINUS (-)
+
+const code = (type, value) => {
+    if (type === types.Delim) {
+        type = value;
+    }
+
+    if (typeof type === 'string') {
+        const charCode = type.charCodeAt(0);
+        return charCode > 0x7F ? 0x8000 : charCode << 8;
+    }
+
+    return type;
+};
+
+// https://www.w3.org/TR/css-syntax-3/#serialization
+// The only requirement for serialization is that it must "round-trip" with parsing,
+// that is, parsing the stylesheet must produce the same data structures as parsing,
+// serializing, and parsing again, except for consecutive <whitespace-token>s,
+// which may be collapsed into a single token.
+
+const specPairs = [
+    [types.Ident, types.Ident],
+    [types.Ident, types.Function],
+    [types.Ident, types.Url],
+    [types.Ident, types.BadUrl],
+    [types.Ident, '-'],
+    [types.Ident, types.Number],
+    [types.Ident, types.Percentage],
+    [types.Ident, types.Dimension],
+    [types.Ident, types.CDC],
+    [types.Ident, types.LeftParenthesis],
+
+    [types.AtKeyword, types.Ident],
+    [types.AtKeyword, types.Function],
+    [types.AtKeyword, types.Url],
+    [types.AtKeyword, types.BadUrl],
+    [types.AtKeyword, '-'],
+    [types.AtKeyword, types.Number],
+    [types.AtKeyword, types.Percentage],
+    [types.AtKeyword, types.Dimension],
+    [types.AtKeyword, types.CDC],
+
+    [types.Hash, types.Ident],
+    [types.Hash, types.Function],
+    [types.Hash, types.Url],
+    [types.Hash, types.BadUrl],
+    [types.Hash, '-'],
+    [types.Hash, types.Number],
+    [types.Hash, types.Percentage],
+    [types.Hash, types.Dimension],
+    [types.Hash, types.CDC],
+
+    [types.Dimension, types.Ident],
+    [types.Dimension, types.Function],
+    [types.Dimension, types.Url],
+    [types.Dimension, types.BadUrl],
+    [types.Dimension, '-'],
+    [types.Dimension, types.Number],
+    [types.Dimension, types.Percentage],
+    [types.Dimension, types.Dimension],
+    [types.Dimension, types.CDC],
+
+    ['#', types.Ident],
+    ['#', types.Function],
+    ['#', types.Url],
+    ['#', types.BadUrl],
+    ['#', '-'],
+    ['#', types.Number],
+    ['#', types.Percentage],
+    ['#', types.Dimension],
+    ['#', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['-', types.Ident],
+    ['-', types.Function],
+    ['-', types.Url],
+    ['-', types.BadUrl],
+    ['-', '-'],
+    ['-', types.Number],
+    ['-', types.Percentage],
+    ['-', types.Dimension],
+    ['-', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    [types.Number, types.Ident],
+    [types.Number, types.Function],
+    [types.Number, types.Url],
+    [types.Number, types.BadUrl],
+    [types.Number, types.Number],
+    [types.Number, types.Percentage],
+    [types.Number, types.Dimension],
+    [types.Number, '%'],
+    [types.Number, types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['@', types.Ident],
+    ['@', types.Function],
+    ['@', types.Url],
+    ['@', types.BadUrl],
+    ['@', '-'],
+    ['@', types.CDC], // https://github.com/w3c/csswg-drafts/pull/6874
+
+    ['.', types.Number],
+    ['.', types.Percentage],
+    ['.', types.Dimension],
+
+    ['+', types.Number],
+    ['+', types.Percentage],
+    ['+', types.Dimension],
+
+    ['/', '*']
+];
+// validate with scripts/generate-safe
+const safePairs = specPairs.concat([
+    [types.Ident, types.Hash],
+
+    [types.Dimension, types.Hash],
+
+    [types.Hash, types.Hash],
+
+    [types.AtKeyword, types.LeftParenthesis],
+    [types.AtKeyword, types.String],
+    [types.AtKeyword, types.Colon],
+
+    [types.Percentage, types.Percentage],
+    [types.Percentage, types.Dimension],
+    [types.Percentage, types.Function],
+    [types.Percentage, '-'],
+
+    [types.RightParenthesis, types.Ident],
+    [types.RightParenthesis, types.Function],
+    [types.RightParenthesis, types.Percentage],
+    [types.RightParenthesis, types.Dimension],
+    [types.RightParenthesis, types.Hash],
+    [types.RightParenthesis, '-']
+]);
+
+function createMap(pairs) {
+    const isWhiteSpaceRequired = new Set(
+        pairs.map(([prev, next]) => (code(prev) << 16 | code(next)))
+    );
+
+    return function(prevCode, type, value) {
+        const nextCode = code(type, value);
+        const nextCharCode = value.charCodeAt(0);
+        const emitWs =
+            (nextCharCode === HYPHENMINUS &&
+                type !== types.Ident &&
+                type !== types.Function &&
+                type !== types.CDC) ||
+            (nextCharCode === PLUSSIGN)
+                ? isWhiteSpaceRequired.has(prevCode << 16 | nextCharCode << 8)
+                : isWhiteSpaceRequired.has(prevCode << 16 | nextCode);
+
+        if (emitWs) {
+            this.emit(' ', types.WhiteSpace, true);
+        }
+
+        return nextCode;
+    };
+}
+
+const spec = createMap(specPairs);
+const safe = createMap(safePairs);
+
+exports.safe = safe;
+exports.spec = spec;