test(error): Emit through the error flow in the dialog test

The fake source was asked to emit directly; SingleEventFlow's emitters live
on the errorEvents flow itself, the way the ViewModels use them.

app/src/testGplay/java/eu/darken/capod/common/error/ComposeErrorDialogTest.kt

@@ -50,7 +50,7 @@ class ComposeErrorDialogTest : BaseTest() {
             }
         }
         // Buffered channel: the event survives until the handler's collector attaches.
-        source.emitBlocking(error)
+        source.errorEvents.tryEmit(error)
         composeRule.waitForIdle()
     }