[Bug] Tab key doesn't toggle thinking mode; always enabled on startup

Bug Description
Title: Tab key not working to toggle thinking mode, always enabled on startup (v2.0.67)

Description:

• Version: 2.0.67
• OS: Windows
• Model: Sonnet 4.5 (Default)

Bug:

1. Tab key no longer toggles extended thinking mode on/off
2. After startup, extended thinking is always enabled regardless of the setting in settings.json
3. Even when ~/.claude/settings.json contains "alwaysThinkingEnabled": false, thinking mode is always on
4. This causes unexpectedly high token consumption

Expected behavior:

• Tab key should toggle thinking mode on/off
• settings.json configuration should be respected on startup

Additional info:

• /config shows "Thinking mode: true" after every restart
• Input bar color indicates thinking is always enabled (purple instead of gray)

Environment Info

• Platform: win32
• Terminal: null
• Version: 2.0.67
• Feedback ID: 9b9cb90c-1d25-4bd2-a41b-01d89d25da9e

Errors

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