fix(ai-config): gptel-model must be a symbol, not a string

The default-backend swap to gpt-5.5 (commit 1d9c68dd) set
`gptel-model' as the string "gpt-5.5".  gptel's modeline-display
code calls `symbolp' on the model value and signals
`wrong-type-argument symbolp "gpt-5.5"' on every render, which
manifested as Emacs freezing in the AI-Assistant buffer ("Querying
ChatGPT..." → error in process sentinel → repeated redisplay errors).

Both default-setting sites now use `'gpt-5.5' (interned symbol).
The Anthropic backend tolerated string model names so the original
"claude-opus-4-7" string worked, which is why this hadn't surfaced
before.

0 files changed, 0 insertions, 0 deletions