fix(pi): catalog model ids, strip ANSI from --model

[duyet]

Why

`anyr pi` with session model `stealth/ox-alpha` 404ed as `stealth/ox-alpha[1m]`.

Two bugs:

1. We passed `--model anyrouter/` even though `--provider anyrouter` was already set. Official AnyRouter Pi guide is `pi --provider anyrouter --model "openai/gpt-5.4-mini"`.
2. TUI-copied ids can carry a dangling SGR suffix (`[1m` is bold). The gateway then looks up a model that does not exist.

What

• `--model` is the catalog id (`stealth/ox-alpha`)
• Sanitize ANSI / dangling `[Nm` on spawn
• `anyrouter/auto` resolves to Pi's default sonnet id

Test

`cargo test --all-targets`

[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	2.3 MiB	3.36 ms	2.36 ms
anyr-linux-arm64	native	2.3 MiB	0.73 ms	0.78 ms
anyr-linux-x86_64	native	2.6 MiB	0.93 ms	0.91 ms
anyr-windows-x86_64.exe	native	2.2 MiB	9.38 ms	9.22 ms
anyr.wasm	wasm	172.9 KiB	—	—

Budget check: ok

raw timings

[
  {
    "asset": "anyr-darwin-arm64",
    "kind": "native",
    "path": "/Users/runner/work/cli/cli/anyr-darwin-arm64",
    "bytes": 2461656,
    "size": "2.3 MiB",
    "version": "0.1.10 (built 2026-08-24 11:40:03)",
    "target": "aarch64-apple-darwin",
    "os": "macos-latest",
    "startup_version": {
      "n": 21,
      "min_ms": 2.98,
      "median_ms": 3.36,
      "p95_ms": 3.59,
      "mean_ms": 3.31
    },
    "startup_help": {
      "n": 21,
      "min_ms": 2.28,
      "median_ms": 2.36,
      "p95_ms": 3.0,
      "mean_ms": 2.44
    }
  },
  {
    "asset": "anyr-linux-arm64",
    "kind": "native",
    "path": "/home/runner/work/cli/cli/anyr-linux-arm64",
    "bytes": 2429920,
    "size": "2.3 MiB",
    "version": "0.1.10 (built 2026-08-24 11:39:53)",
    "target": "aarch64-unknown-linux-gnu",
    "os": "ubuntu-24.04-arm",
    "startup_version": {
      "n": 21,
      "min_ms": 0.68,
      "median_ms": 0.73,
      "p95_ms": 0.83,
      "mean_ms": 0.75
    },
    "startup_help": {
      "n": 21,
      "min_ms": 0.7,
      "median_ms": 0.78,
      "p95_ms": 0.84,
      "mean_ms": 0.77
    }
  },
  {
    "asset": "anyr-linux-x86_64",
    "kind": "native",
    "path": "/home/runner/work/cli/cli/anyr-linux-x86_64",
    "bytes": 2728000,
    "size": "2.6 MiB",
    "version": "0.1.10 (built 2026-08-24 11:40:03)",
    "target": "x86_64-unknown-linux-gnu",
    "os": "ubuntu-latest",
    "startup_version": {
      "n": 21,
      "min_ms": 0.92,
      "median_ms": 0.93,
      "p95_ms": 1.0,
      "mean_ms": 0.94
    },
    "startup_help": {
      "n": 21,
      "min_ms": 0.89,
      "median_ms": 0.91,
      "p95_ms": 0.98,
      "mean_ms": 0.92
    }
  },
  {
    "asset": "anyr-windows-x86_64.exe",
    "kind": "native",
    "path": "D:\\a\\cli\\cli\\anyr-windows-x86_64.exe",
    "bytes": 2258432,
    "size": "2.2 MiB",
    "version": "0.1.10 (built 2026-08-24T11:41:12Z)",
    "target": "x86_64-pc-windows-msvc",
    "os": "windows-latest",
    "startup_version": {
      "n": 21,
      "min_ms": 8.96,
      "median_ms": 9.38,
      "p95_ms": 11.1,
      "mean_ms": 9.73
    },
    "startup_help": {
      "n": 21,
      "min_ms": 8.84,
      "median_ms": 9.22,
      "p95_ms": 9.73,
      "mean_ms": 9.29
    }
  },
  {
    "asset": "anyr.wasm",
    "kind": "wasm",
    "path": "/home/runner/work/cli/cli/target/wasm-pkg/anyr_cli_bg.wasm",
    "bytes": 177071,
    "size": "172.9 KiB",
    "version": "wasm",
    "target": "wasm32-unknown-unknown",
    "os": ""
  }
]