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/postcss-minify-selectors/src/index.js

@@ -163,6 +163,13 @@ const tagReplacements = new Map([
 function tag(selector) {
   const value = selector.value.toLowerCase();
 
+  const isSimple = selector.parent && selector.parent.nodes.length === 1;
+  // Avoid simplifying complex selectors (`entry 100% {...}`)
+  if (!isSimple) {
+    return;
+  }
+
+  // Simplify simple selectors that have replacements (`100% {...}`)
   if (tagReplacements.has(value)) {
     selector.value = /** @type {string} */ (tagReplacements.get(value));
   }
@@ -190,11 +197,15 @@ const reducers = new Map(
   ])
 );
 
+/** @typedef {object} Options
+ *  @property {boolean} [sort=true]
+ */
 /**
  * @type {import('postcss').PluginCreator<void>}
+ * @param {Options} opts
  * @return {import('postcss').Plugin}
  */
-function pluginCreator() {
+function pluginCreator(opts = { sort: true }) {
   return {
     postcssPlugin: 'postcss-minify-selectors',
 
@@ -226,7 +237,9 @@ function pluginCreator() {
             }
           }
         });
-        selectors.nodes.sort();
+        if (opts.sort) {
+          selectors.nodes.sort();
+        }
       });
 
       css.walkRules((rule) => {

node_modules/postcss-minify-selectors/src/lib/canUnquote.js

@@ -1,4 +1,6 @@
 'use strict';
+
+const cssesc = require('cssesc');
 /**
  * Can unquote attribute detection from mothereff.in
  * Copyright Mathias Bynens <https://mathiasbynens.be/>
@@ -20,5 +22,9 @@ module.exports = function canUnquote(value) {
 
   value = value.replace(escapes, 'a').replace(/\\./g, 'a');
 
-  return !(range.test(value) || /^(?:-?\d|--)/.test(value));
+  return (
+    !(range.test(value) || /^(?:-?\d|--)/.test(value)) &&
+    // Do not remove the quotes if escaping is required.
+    cssesc(value) === value
+  );
 };