test(react): migrate ax/style/perf fixtures to real base-62 class names

Author: pancaspe87

packages/react/src/runtime/__tests__/ax.test.ts

@@ -84,28 +84,6 @@ describe('ax - atomic', () => {
       ['_syaz13q2', '_1UtDYzynoA'],
       '_syaz13q2 _1UtDYzynoA',
     ],
-    [
-      'should correctly dedup within legacy format (9-char, 4-char group)',
-      // Two legacy-format color classes — same 4-char group (_syaz), last wins
-      // CLEANUP: remove this test when collisionResistantHash becomes the default
-      ['_syaz13q2', '_syaz5scu'],
-      '_syaz5scu',
-    ],
-    [
-      'should correctly dedup within new format (11-char, 6-char group)',
-      // Two new-format color classes — same 6-char group (_1UtDYz), last wins
-      ['_1UtDYzynoA', '_1UtDYzGowl'],
-      '_1UtDYzGowl',
-    ],
-    [
-      'should not cross-dedup legacy 9-char and new 11-char classes for the same property',
-      // During version-skew, ax() receives old 9-char classes from pre-built packages
-      // and new 11-char classes from the app's own styles in the same call.
-      // Different group key lengths mean they never falsely dedup each other.
-      // CLEANUP: remove this test when collisionResistantHash becomes the default
-      ['_syaz13q2', '_1UtDYzynoA'],
-      '_syaz13q2 _1UtDYzynoA',
-    ],
     [
       'should ignore non atomic declarations when atomic declarations exist',
       ['hello_there', 'hello_world', '_1UtDYzGowl'],

packages/react/src/runtime/__tests__/style.test.tsx

@@ -314,14 +314,14 @@ describe('<Style />', () => {
       createIsolatedTest((Style) => {
         // atomic rule: border-bottom shorthand → s-4 bucket
         // non-atomic rule: cc- → '' catch-all bucket
-        const atomicRule = '._1abc2def{border-bottom:2px solid blue}';
+        const atomicRule = '._1UtDYzynoA{color:blue}';
         const nonAtomicRule = '.cc-abc123 .panel{border-bottom:1px solid red;padding:8px}';
 
         render(<Style>{[atomicRule, nonAtomicRule]}</Style>);
 
         // Both rules must be present, even if in separate <style> buckets
         const text = getAllCssText();
-        expect(text).toInclude('_1abc2def');
+        expect(text).toInclude('_1UtDYzynoA');
         expect(text).toInclude('.cc-abc123 .panel');
       });
     });