fix: preserve namespace separators in Pest describe block names from locationHint (#407)

When Pest reports a test inside describe(SomeClass::class, ...), the
locationHint contains backslashes as namespace separators in the method
name (e.g. `Foo\Services\PlaylistService` → it test). The previous
.replace(/\\/g, '/') converted ALL backslashes, so the runtime ID
produced Foo/Services/PlaylistService which did not match the static
analysis ID (Foo\Services\PlaylistService), causing Test Explorer icons
to never update.

Fix: only apply the backslash-to-slash normalisation on the file path
portion (before ::), leaving the method name portion untouched.

Closes #404

Author: recca0120

packages/phpunit/src/TestIdentifier/PestTestIdentifier.test.ts

@@ -46,6 +46,20 @@ describe('PestTestIdentifier', () => {
         });
     });
 
+    describe('fromLocationHint with namespaced describe block (::class)', () => {
+        it.each([
+            [
+                // describe(PlaylistService::class, ...) where PlaylistService is in Foo\\Services namespace
+                'pest_qn://tests/Unit/PlaylistServiceTests.php::`Foo\\Services\\PlaylistService` → it does something',
+                'it does something',
+                'tests/Unit/PlaylistServiceTests.php::`Foo\\Services\\PlaylistService` → it does something',
+            ],
+        ])('fromLocationHint(%j, %j) → id: %s', (locationHint, name, expectedId) => {
+            const result = transformer.fromLocationHint(locationHint, name);
+            expect(result.id).toBe(expectedId);
+        });
+    });
+
     describe('fromLocationHint v2 evaluable testSuiteStarted', () => {
         it.each([
             [

packages/phpunit/src/TestIdentifier/PestTestIdentifier.ts

@@ -35,9 +35,13 @@ export class PestTestIdentifier extends PHPUnitTestIdentifier {
             /(pest_qn|file):\/\/(?<id>(?<prefix>[\w\s]+)\((?<classFQN>[\w\\]+)\)(::(?<method>.+))?)/,
         );
         if (!matched) {
-            const location = PestV1Fixer.fixLocationHint(
-                locationHint.replace(/(pest_qn|file):\/\//, '').replace(/\\/g, '/'),
-            );
+            const raw = locationHint.replace(/(pest_qn|file):\/\//, '');
+            const sepIdx = raw.indexOf('::');
+            const normalized =
+                sepIdx === -1
+                    ? raw.replace(/\\/g, '/')
+                    : raw.slice(0, sepIdx).replace(/\\/g, '/') + raw.slice(sepIdx);
+            const location = PestV1Fixer.fixLocationHint(normalized);
             const id = this.normalizeMethodName(PestV2Fixer.fixId(location, name));
             const file = location.split('::')[0];