feat: Add support for configuring Gemini sessions to start in YOLO mode (auto-approve all actions)

[dachrisch]

1. Gemini YOLO Flag

• Gemini CLI supports -y or --yolo flag
• Also supports --approval-mode yolo
• Purpose: Auto-approve all tool actions without confirmation

2. Current Claude Dangerous Mode Pattern

Location: internal/session/userconfig.go

• ClaudeSettings struct has DangerousMode bool field
• Config format: [claude] section with dangerous_mode = true
• Used in: buildClaudeCommand(), buildClaudeResumeCommand()

[asheshgoplani]

This is already implemented! 🎉

Global config (~/.agent-deck/config.toml):

[gemini]
yolo_mode = true

Per-session override: The GeminiYoloMode field in sessions.json can override the global setting for individual sessions.

How it works:

• New sessions: gemini --yolo (if enabled)
• Resume: gemini --resume <session-id> --yolo

Added in recent community PR integration (v0.8.35). Closing as complete.