Add configuration option to control default expand/collapse state of tool output blocks

Feature Description

Add a configuration option to control whether tool output blocks (thinking blocks, context blocks) are expanded or collapsed by default in the terminal UI.

Currently in v0.26.24+, these blocks are collapsed by default to prevent "streaming flicker" and keep the UI clean. While this is a good default, some users prefer to see the full output without manually toggling with Ctrl+O each time.

Proposed solution:

• Add a defaultExpandOutput boolean option to ~/.commandcode/config.json
• Default value: false (current behavior)
• When set to true, tool output blocks would be expanded by default

Use Case

This would benefit users who:

• Need to see the full AI reasoning/context for debugging or learning purposes
• Work in environments where manually expanding blocks adds friction to their workflow
• Prefer transparency in AI interactions and want to review all outputs
• Are reviewing complex multi-step operations where collapsing hides important context

Additional Context

This is a feature request stemming from the v0.26.24 release which intentionally collapsed these blocks by default. The current workaround is using Ctrl+O to toggle, but a configuration option would provide flexibility without requiring action on every session.

Priority: Important for my workflow

Commencez par localiser la gestion de la configuration de ~/.commandcode/config.json et le point d’entrée de l’interface utilisateur du terminal qui contrôle les blocs de sortie des outils et le basculement Ctrl+O. Ajoutez le comportement de defaultExpandOutput tout en conservant la valeur par défaut actuellement réduite, puis vérifiez que le définir sur true démarre les sessions avec les blocs de réflexion et de contexte développés.