#2265 UI shows JAM at address beyond CPU address space

[Ingo Korb]

When the CPU encounters a JAM after the PC has wrapped from $ffff to 0, the UI shows an incorrect address for the JAM. The attached repro triggers this with a displayed address of $10002.

AI disclosure: I happened to notice it while Claude Opus was hunting down a bug in a personal project and asked it to create a minimal reproducer, which is the attached code. The text of this bug report is 100% human-written.