Use the registry's default_model() accessor so inline assist can use the same automatically selected fallback model as agent sessions when no configured default model resolves. Keep explicit inline model selection as the first choice. Related to #59309. Release Notes: - Fixed Inline Assistant failing to select an available fallback model when no default model is configured. --------- Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>