Real app runtime inspection: OpenCode 2.2.7, web client, fresh isolated databases.
Both turns used the identical three-bar html_render prompt.
Both turns completed with a dynamic_tool named execute returning htmlRender.

base 1e438c8f806c361943f6f20ed5b1a5cc7ec70e4e
Before deletion: execute completed; title=Repro chart; height=200; HTML file existed.
Browser: no inline page; publication reply only.
After UI Thread actions > Delete > Confirm: deleted_at is set = True
After deletion: matching HTML file exists = True

head ed44675f2ee1d04c61b6808ed5dc2110eabc849f
Before deletion: execute completed; title=Repro chart; height=200; HTML file existed.
Browser: three-bar page inline above publication reply.
After UI Thread actions > Delete > Confirm: deleted_at is set = True
After deletion: matching HTML file exists = False