fix(test): update F-A2-01 stale JarvisBusWorld assertion to .page

The Bus production switched from `WKContentWorld.world(name: "JarvisBusWorld")`
to `WKContentWorld.page` in fb41c5f, but `WebviewBridgeOutboundTests
.test_sendWhenArmedCallsEvaluator` line 80 still asserted the retired
named world. Test was reported green in HANDOFF but actually fails on a
fresh run — the stale literal flagged in the 2026-05-03 tests audit.

Updated assertion + comment trail explaining the fb41c5f drift.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/Bus/Tests/BusTests/WebviewBridgeOutboundTests.swift

@@ -77,7 +77,10 @@ final class WebviewBridgeOutboundTests: XCTestCase {
         let decoded = try BusCoder.makeDecoder()
             .decode(BusOutbound.self, from: Data((payload ?? "").utf8))
         XCTAssertEqual(decoded, .hudState(.idle))
-        XCTAssertEqual(call.contentWorld, WKContentWorld.world(name: "JarvisBusWorld"))
+        // F-A2-01: production WebviewBridge uses `WKContentWorld.page` (the
+        // default since `fb41c5f`); the prior `JarvisBusWorld` named-world
+        // assertion was retired in that commit but this test wasn't updated.
+        XCTAssertEqual(call.contentWorld, .page)
     }
 
     func test_sendWhenNotArmedThrows() async {