fix(ui): HUD layout pass — resolve overlapping elements (#792)

- HUD status panel moved to y=80 (below TimeDisplay at 16-70)
- Removed redundant time row from HUD (TimeDisplay handles it)
- Debug overlay starts at y=150 (below HUD status panel)
- Stance indicator moved below minimap (y=192, was overlapping at y=16)
- Interaction prompt moved to y=-240 (above dialogue box at -200)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

client/ui/interaction_prompt.tscn

@@ -8,8 +8,9 @@ anchor_top = 1.0
 anchor_right = 1.0
 anchor_bottom = 1.0
 offset_left = 200.0
-offset_top = -60.0
+offset_top = -240.0
 offset_right = -200.0
+offset_bottom = -210.0
 grow_horizontal = 2
 grow_vertical = 0
 mouse_filter = 2