use models from model picker on CC as priority for smart routing

[lilly-luo]

as titled. i tested:

  "modelPicker": {
    "replaceBuiltInOptions": true,
    "options": [
      {
        "model": "system.ai.claude-opus-4-8"
      },
      {
        "model": "system.ai.glm-5-2"
      },
      {
        "model": "system.ai.glm-5-3-flash"
      },
      {
        "model": "system.ai.claude-sonnet-4-6"
      }
    ]
  }

• added the 4 models in /etc/claude-code/managed-settings.json and confirmed that smart routing worked and these were the only 4 models sent
• added the 4 models in ~/.claude/ucode-settings.json and confirmed that smart routing worked and these were the only 4 models sent (nothing in managed-settings.json)
• added the 4 models in ~/.claude/settings.json and confirmed that smart routing worked and these were the only 4 models sent (nothing in ucode-settings.json or managed settings).