llama_cpp falls back to _extract_quant_label(gguf_path) when a load names no
variant, and /status echoes that as gguf_variant, so the sidebar wrote settings
under <path>:Q4_K_M while the Hub row, the picker and the backfill used the bare
path. The auto-switch lookup reads target_id before target_id:file_variant, so
the bare entry always won and a sidebar edit could never reach an API load.
The sidebar now nulls the variant for the settings identity, the same rule
settingsGgufVariantForRow applies to a Hub row, sharing one definition. The
displayed label still carries the quant.
84bf2744f8