fix: prevent asset conflicts between React and Grid.js versions

Add coexistence checks to all enqueue methods to prevent loading
both React and Grid.js assets simultaneously.

Changes:
- ReactAdmin.php: Only enqueue React assets when ?react=1
- Init.php: Skip Grid.js when React active on admin pages
- Form.php, Coupon.php, Access.php: Restore classic assets when ?react=0
- Customer.php, Product.php, License.php: Add coexistence checks

Now the toggle between Classic and React versions works correctly.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

node_modules/comment-parser/src/primitives.ts

@@ -0,0 +1,69 @@
+/** @deprecated */
+export enum Markers {
+  start = '/**',
+  nostart = '/***',
+  delim = '*',
+  end = '*/',
+}
+
+export interface BlockMarkers {
+  start: string;
+  nostart: string;
+  delim: string;
+  end: string;
+}
+
+export interface Block {
+  description: string;
+  tags: Spec[];
+  source: Line[];
+  problems: Problem[];
+}
+
+export interface Spec {
+  tag: string;
+  name: string;
+  default?: string;
+  type: string;
+  optional: boolean;
+  description: string;
+  problems: Problem[];
+  source: Line[];
+}
+
+export interface Line {
+  number: number;
+  source: string;
+  tokens: Tokens;
+}
+
+export interface Tokens {
+  start: string;
+  delimiter: string;
+  postDelimiter: string;
+  tag: string;
+  postTag: string;
+  name: string;
+  postName: string;
+  type: string;
+  postType: string;
+  description: string;
+  end: string;
+  lineEnd: string;
+}
+
+export interface Problem {
+  code:
+    | 'unhandled'
+    | 'custom'
+    | 'source:startline'
+    | 'spec:tag:prefix'
+    | 'spec:type:unpaired-curlies'
+    | 'spec:name:unpaired-brackets'
+    | 'spec:name:empty-name'
+    | 'spec:name:invalid-default'
+    | 'spec:name:empty-default';
+  message: string;
+  line: number;
+  critical: boolean;
+}