Make Battle Forecast a prominent encounter feature

[Daren9m]

Problem

Battle Forecast is easy to miss among the encounter action controls even though it provides the best practical risk estimate.

Acceptance criteria

• A visually distinct Battle Forecast callout appears with generated encounter results before secondary details.
• The callout explains the value of the forecast and has a clear primary action.
• Loading, first-run party setup, completed, and stale states remain understandable.
• The control remains keyboard accessible and responsive.
• Print output does not include interactive-only promotional controls.