Add 10-min GPU idle-shutdown; make Preview/Code toggle a real button

Add Preview/Code toggle: real source files from the reference targets

Add explicit 'End Session' to archive test runs as a documented decision

Give Jessica a Play button: real LLM line + real speech, audio-reactive puppet

Archive completed Test Bench runs to a paginated Gallery page

Add persistent top-center nav across Home/Pipeline/Briefing/Test Bench

Add artifact-immutability lock at the grid boundary

Wire Jessica reference photo into Test Bench Default Model slot

Add Test Bench: grid-inspect pipeline stages against real reference implementations