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/uc.micro/CHANGELOG.md

@@ -0,0 +1,52 @@
+1.0.6 / 2019-01-31
+------------------
+
+- Unicode update to 10.0.0.
+- Fixed `Z` content (added missed line and paragraph seperators), #10.
+
+
+1.0.5 / 2018-01-26
+------------------
+
+- Remove outdated license info from readme (missed in previous update).
+
+
+1.0.4 / 2018-01-26
+------------------
+
+- Unicode update to 10.0.0.
+- Clarified license, should be MIT, #6.
+
+
+1.0.3 / 2016-09-14
+------------------
+
+- Unicode update to 9.0.0.
+- Rewrite update script (use npm instead of Makefile).
+- Added integrity tests.
+
+
+1.0.2 / 2015-06-24
+------------------
+
+- License info clarify, #3.
+
+
+1.0.1 / 2015-05-30
+------------------
+
+- Update to Unicode 8.+.
+- Also automatically fix possible ReDOS in `Any`, if source used to generate
+  patterns like `(Any)+`.
+
+
+1.0.0 / 2015-03-10
+------------------
+
+- Export all in index.js.
+
+
+0.1.0 / 2015-02-22
+------------------
+
+- First release.