fix: Drop ChatInterface(type=...), removed in Gradio 6

fix: Make the Space a Gradio app, which is what ZeroGPU requires

add: Hosted generation for the Space, and retire the ZeroGPU attempt

fix: Launch the probe again, with SSR off

fix: Mount the ZeroGPU probe instead of launching a second server

add: A two-sided CUDA diagnostic for the ZeroGPU worker failure

fix: Run inference inside @spaces.GPU, where the weights actually exist

fix: Warm the retrieval embedder inside ZeroGPU's import window too

fix: Build the Space's agent at import scope, where ZeroGPU is watching

fix: Accept the Space's existing CONTROLAI_BACKEND spelling, and stop guessing

add: A CUDA path for the demo Space, behind the existing engine contract