[Secondary] Gamepad Grid Cursor & Tile Navigation

[MeriAlguero]

[Secondary] Gamepad Grid Cursor & Tile Navigation

Priority: Secondary / Post-MVP
Labels: enhancement, gameplay, secondary

Summary

Replace mouse raycasting with a grid-based cursor controlled by a gamepad D-Pad/Analog stick to allow players to select tiles and move units.

Tasks

• Create a visual GridCursor prefab (highlighted border or hover effect over tiles).
• Implement a GridCursorController that listens to Maps vector input from the active player's gamepad.
• Clamp cursor movement within grid boundaries (0 to 7 on X and Y axes).
• Implement tile selection: pressing Submit (A) on a unit selects it; pressing Submit (A) on a highlighted tile moves the unit.
• Pressing Cancel (B) deselects the current unit or cancels target selection.

Acceptance Criteria

• Pushing the analog stick/D-Pad moves the cursor cleanly from tile to tile.
• Pressing A selects units and moves them if the target tile is within valid move range.
• Pressing B cleanly cancels tile selection.