fix(tui): pin anyrouter/auto in the inline model picker

[duyet]

Closes #37.

Rebased onto main after #39 (97d3370). Per-agent --agent bind/launch from #39 is kept. This PR still only pins anyrouter/auto in the picker (no most-used dump).

Summary

The inline model picker now treats anyrouter/auto as a first-class selectable preset. It no longer leads with or dumps a most-used / usage ranking as the picker contents.

• Pinned id is anyrouter/auto (typeahead matches that label).
• Remaining catalog ids (when lookup is on) are sorted by name, not usage.
• anyr models --dump-tui prints one picker frame for tests and pipes.
• anyr models use anyrouter/auto persists the preset without a catalog fetch.
• anyr claude --model "stealth/ox-alpha[1m]" --yolo is unchanged (covered by dry-run tests).
• --pick --agent uses the same picker (preset available without a catalog fetch).

Does not change pick-agent-then-settings chrome (#36) or the update spinner (#38).

Evidence

Isolated control-anyr run (ANYR_NO_CATALOG=1):

• anyr models --dump-tui → ◆ anyrouter/auto only; no most used
• anyr models use anyrouter/auto → Saved default model anyrouter/auto
• subsequent anyr claude --dry-run --yes → ANTHROPIC_MODEL=anyrouter/auto

cargo test --locked --lib --test cli: passed after rebase.

Checklist

• Version stays on 0.1.x (do not introduce 0.2 / 1.0)
• Do not auto-merge release-please PRs

  

[github-actions]

anyr size and startup

Startup is wall time for a cold anyr --version / anyr --help (median of 21 runs). Size is the stripped release binary, or the .wasm for the browser demo.

Size budget: anyr-linux-x86_64 must stay ≤ 4.0 MiB (4194304 bytes) stripped.

Asset	Kind	Size	--version median	--help median
anyr-darwin-arm64	native	2.7 MiB	2.68 ms	2.37 ms
anyr-darwin-x86_64	native	2.9 MiB	33.27 ms	30.75 ms
anyr-linux-arm64	native	2.7 MiB	0.77 ms	0.81 ms
anyr-linux-x86_64	native	3.0 MiB	0.74 ms	0.73 ms
anyr-windows-x86_64.exe	native	2.5 MiB	7.3 ms	7.11 ms
anyr.wasm	wasm	176.3 KiB	—	—

Budget check: ok

raw timings

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