fix(cli): sort model picker list alphabetically

[Bartok9]

Summary

• Sort the interactive model picker list alphabetically (case-insensitive).
• The current model still gets pinned to the top with its ← currently in use marker.

Motivation

Closes #57578.

_prompt_model_selection() in hermes_cli/auth.py presented model_ids in whatever order they arrived from the provider probe / catalog. For Ollama Cloud (a live /v1/models list merged with the models.dev registry) and OpenRouter (models.dev catalog order) that order is non-deterministic and changes between invocations, so finding a specific model in a 30+ entry list is an unnecessary visual search.

Fix

Sort model_ids with sorted(model_ids, key=str.casefold) before building the ordered list. The "current model first" behaviour and dedup are unchanged.

Verification

• python3 -m pytest tests/hermes_cli/test_terminal_menu_fallbacks.py — 8 passed
• Added 2 regression tests (via the numbered-input fallback):
  • test_prompt_model_selection_sorts_models_alphabetically — unsorted/mixed-case input is presented alphabetically
  • test_prompt_model_selection_keeps_current_first_then_sorted — current model stays pinned first, remainder sorted
• Confirmed both tests fail on main without the one-line sort change.

[teknium1]

Thanks for the focused picker improvement. Current main still preserves input order in hermes_cli/auth.py:6750-6756; both the curses picker (hermes_cli/auth.py:6828-6865) and numbered fallback (hermes_cli/auth.py:6876-6903) consume that same list. The proposed case-insensitive sort fixes both paths while retaining the current-model-first and exact-deduplication behavior. The added fallback tests exercise the selected-item behavior rather than snapshotting a catalog.

Automated hermes-sweeper review.

[Bartok9]

Thanks for the review and the sweeper:blast-contained label — agreed this stays a one-line case-insensitive sort at the shared list-build site, so both the curses picker and numbered fallback stay in lockstep with current-model-first + exact dedup unchanged.

Rebased onto current main just now so the branch is no longer 1k+ commits behind; the cherry-pick applied cleanly (only hermes_cli/auth.py + the two regression tests). Local check: python3 -m pytest tests/hermes_cli/test_terminal_menu_fallbacks.py — 8 passed. CI re-running on the rebased head.