Group the model lists and say which row this machine should take

The two local model boxes handed over a flat list sorted by size and left
every choice in it to the reader. For whisper that interleaved the models:
large-v3-turbo-q5_0 landed between the two medium quantisations, half a
screen from the turbo model it is a copy of. For cleanup it was forty
repository ids, half of which answer with nothing at all because what they
publish is split across files or larger than the cap, and an empty box read
as though the click had not registered.

Now each box says what the machine is, groups the list by model, and marks
the row to take:

- whisper rows are grouped by model, with the quantisations and the
  English-only files under the model they are a copy of, and every row says
  its bit depth rather than leaving q5_1 and Q4_K_M and BF16 to be decoded.
- the recommendation follows the machine. Under 4 GB it is small-q5_1;
  with a graphics interface and 15 GB it is large-v3-q5_0, which is worth
  about two and a half points of word error in the languages that are not
  English; in between it is turbo, and a processor build where the Vulkan
  one belongs is not counted as a card.
- a row larger than half the memory less a gigabyte says it is too big.
- the publisher box holds the five suggestions until the switch beside it
  is turned on, and a line under it says in words what the chosen one is.
- a publisher that answers with nothing says why instead of going blank.
- the draft heads (dflash, dspark, eagle3) are no longer offered as models,
  and neither are the base models that sit beside their tuned twin.

README.md

@@ -161,7 +161,9 @@ running.
 - **It all runs on this machine by default.** Speech to text on whisper.cpp and
   cleanup on llama.cpp, neither installed beforehand: the settings window fetches
   the program and the model, verifies the sha256 and refuses a download published
-  without one, then keeps a server alive while you dictate. The graphics card is
+  without one, then keeps a server alive while you dictate. The model list is
+  grouped by model rather than by file size, and the row this machine's memory
+  and graphics can take is marked. The graphics card is
   reached through CUDA, ROCm or Vulkan where the build allows. No key, no
   account, nothing leaving the machine. On x86_64 Linux the same button fetches
   a Vulkan build of whisper-server that Dikte publishes itself, because