fix(generators): run UI tests, guard optional bus, harden e2e clones

Three generator fixes:
- templates/feature/vitest.config.ts.hbs lacked an include for
  .test.{ts,tsx}; the node base only includes .test.ts, so scaffolded
  UI component tests never executed
- gen event consume emitted an unguarded bus.subscribe although
  ctx.bus is optional in BindContext — now wrapped in if (bus) {}
- e2e repo clones now exclude /dist and /.next build outputs, and
  every dep-stripping e2e strips the scaffolded package from EVERY
  workspace package.json via globSync instead of a hardcoded dependent
  list that drifts as packages gain or drop the dependency

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

turbo/generators/config.ts

@@ -1300,7 +1300,10 @@ function handlerBindBlock(a: {
     ${containerVar}.unbind(${handlerSymbol});
   }
   ${containerVar}.bind(${handlerSymbol}).toConstantValue(${wrappedVar});
-  bus.subscribe(${eventConst}, "${a.feature}", ${wrappedVar});`;
+  // ctx.bus is an OPTIONAL core (guard per CLAUDE.md binder conventions).
+  if (bus) {
+    bus.subscribe(${eventConst}, "${a.feature}", ${wrappedVar});
+  }`;
 }
 
 function printConsumeNextSteps(a: {