Introduce `Generating` state and clarify `Empty` and `Missing` states.
The `Pending` state now specifically refers to transcription being in
progress.
The `Generating` state covers the period after transcription is complete
but before the LLM has produced the final oneliner state, or when a new
state needs to be generated due to new recordings.
The `Missing` state is collapsed into `Empty` as the UI treats them
identically when no title is expected.
Brummel
6886c20e26