[Bug] Bash classifier in auto mode hardcoded to claude-opus-4-6-1m, unavailable in Opus 4.7 sessions

Bug Description
Title: Bash classifier in auto permission mode routes to claude-opus-4-6[1m],
which is unavailable in Opus 4.7 sessions — every non-read-only Bash command fails

Environment:

• Claude Code CLI
• Session model: claude-opus-4-7[1m] (Opus 4.7, 1M context)
• Permission mode: auto
• Platform: darwin (macOS 15 / Darwin 25.4.0)
• OS Version: 25.4.0

Reproduction:

1. Start a Claude Code session on Opus 4.7 with auto permission mode.
2. Ask Claude to run any Bash command that isn't purely read-only

(e.g. python3 scripts/foo.py, python3 -c "print('hi')", …
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