Selection and inspection

New issue

Let the player find out about their colony by selecting things. A pawn or a building can be selected by clicking it on the map or by clicking its row in a HUD list, and an inspector panel shows the details of whatever is selected.

Rules (decided 2026-09-30)

One selection at a time, either a pawn or a building: GameState.selected.
Selection is what a click means in NONE mode. InteractionMode.SELECT is removed.
Changing interaction mode clears the selection.
Clicking a list row selects without moving the camera.
In PLACE or DEMOLISH, clicks on the lists are ignored and the lists are dimmed. Those modes are left only by doing the action, right-clicking, pressing Esc, or opening the main menu.
The HUD lists are translucent over the map but still catch the mouse, so a click on a list never reaches the map.

Issues

#78: selection model and picking on the map (the foundation for the rest)
#139: Esc and the main menu leave PLACE and DEMOLISH
#140: pawn list
#141: building list
#142: inspector panel
#136 (in milestone #5) adds worker slot controls to a selected site. It depends on #78 and #142.
#146: remove duplication of code with an abstract EntityList class

Acceptance criteria

Any pawn or building can be selected from the map or from its list, and deselected.
The inspector shows current details for the selection.
No click on the HUD ever places, demolishes, or leaves a mode.

No due date

100% Completed