refactor(ui): convert HUD status + interaction prompt to implant (#786, #788)

HUD: merge TimeDisplay into ImplantPanel (time/health/perception in one
panel), remove dead tscn nodes, move HUD to InsertOverlay for D-051 bloom.
Interaction prompt: convert from PanelContainer+StyleBoxFlat to Control
with ImplantPanel+ImplantDataRow, fix panel height for 42px minimum.
Tests updated for new scene structure and public API.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

client/ui/hud.gd

@@ -1,9 +1,10 @@
 extends Control
 
 ## HUD — implant-styled status panel (D-169, D-170).
-## Displays health and perception mode. Time is handled by TimeDisplay.
+## Merged panel: Time, Health, Perception mode. Time row replaces standalone TimeDisplay (#786).
 
 var _panel: ImplantPanel
+var _time_row: ImplantDataRow
 var _health_row: ImplantDataRow
 var _perception_row: ImplantDataRow
 
@@ -22,13 +23,14 @@ func _ready() -> void:
 	_panel.custom_minimum_size.x = 200.0
 	_panel.size.x = 200.0
 	_panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
-	_panel.position = Vector2(16, 80)  # below TimeDisplay (occupies 16-70)
+	_panel.position = Vector2(16, 16)  # top-left; replaces standalone TimeDisplay
 	add_child(_panel)
-	_panel.move_child(_panel.get_node("Content"), 0)
 
+	_time_row = ImplantDataRow.new("--:--")
 	_health_row = ImplantDataRow.new("Health: 100")
 	_perception_row = ImplantDataRow.new("Mode: Baseline")
 
+	_panel.add_component(_time_row)
 	_panel.add_component(_health_row)
 	_panel.add_component(_perception_row)
 
@@ -46,3 +48,18 @@ func update_from_hud_data(data: Dictionary) -> void:
 
 func update_health(health: int) -> void:
 	_health_row.text = UIStrings.get_text("hud.health") + ": " + str(health)
+
+
+func update_from_state() -> void:
+	var gt: Dictionary = GameState.game_time
+	if gt.is_empty():
+		return
+	var tod: int = int(gt.get("time_of_day", 0))
+	var day: int = int(gt.get("day", 0))
+	var phase: String = str(gt.get("day_phase", ""))
+	_time_row.text = "%s · %s · D%d" % [Constants.format_game_time(tod), phase, day + 1]
+
+
+## Returns the time row text. Used by tests after standalone TimeDisplay was removed.
+func get_time_text() -> String:
+	return _time_row.text if _time_row else "--:--"

client/ui/hud.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=3 format=3 uid="uid://cq1y5w3hmxr8b"]
+[gd_scene load_steps=2 format=3 uid="uid://cq1y5w3hmxr8b"]
 
 [ext_resource type="Script" path="res://ui/hud.gd" id="1_hud"]
 [ext_resource type="PackedScene" path="res://ui/star_map.tscn" id="2_starmap"]
@@ -13,32 +13,9 @@ grow_vertical = 2
 mouse_filter = 2
 script = ExtResource("1_hud")
 
-[node name="MarginContainer" type="MarginContainer" parent="."]
-layout_mode = 1
-anchors_preset = 10
-anchor_right = 1.0
-offset_bottom = 100.0
-grow_horizontal = 2
-theme_override_constants/margin_left = 16
-theme_override_constants/margin_top = 16
-theme_override_constants/margin_right = 16
-
-[node name="VBoxContainer" type="VBoxContainer" parent="MarginContainer"]
-layout_mode = 2
-
-[node name="HealthLabel" type="Label" parent="MarginContainer/VBoxContainer"]
-layout_mode = 2
-text = "Health: 100"
-
-[node name="PerceptionLabel" type="Label" parent="MarginContainer/VBoxContainer"]
-layout_mode = 2
-text = "Mode: Baseline"
-
-[node name="TimeLabel" type="Label" parent="MarginContainer/VBoxContainer"]
-layout_mode = 2
-text = "Time: 08:00"
-
-; #674: Star map insert — D-170 z-index layer managed, not visibility toggled
+; #674: Star map — full-screen insert overlay, hidden until player activates (M key / insert UI).
+; Toggled via star_map.toggle_visible() from main.gd.
+; TODO: migrate to HudGroups.open_app("implant/map/starchart") per D-170.
 [node name="StarMap" parent="." instance=ExtResource("2_starmap")]
 visible = false
 

client/ui/interaction_prompt.gd

@@ -1,4 +1,4 @@
-extends PanelContainer
+extends Control
 
 # Interaction prompt — displays available interaction verb for nearby entity.
 # Server-driven: shows when GameState.nearby_interactions is non-empty,
@@ -17,24 +17,28 @@ var _current_target_id: int = -1
 # OQ-07 (#522): when false, prompt is suppressed (z-layer 6 insert overlay only)
 var _insert_active: bool = true
 
-@onready var prompt_label: Label = $MarginContainer/PromptLabel
+var _panel: ImplantPanel
+var _row: ImplantDataRow
 
 
 func _ready() -> void:
 	modulate.a = 0.0
 	visible = false
 	_is_showing = false
-	# D-169: Apply implant theme
-	var t := load("res://ui/implant/default_implant.tres") as ImplantTheme
-	if t:
-		var style := StyleBoxFlat.new()
-		style.bg_color = t.panel_bg
-		style.border_color = t.separator
-		style.set_border_width_all(int(t.border_width))
-		style.set_content_margin_all(t.padding)
-		add_theme_stylebox_override("panel", style)
-		prompt_label.add_theme_color_override("font_color", t.text_primary)
-		prompt_label.add_theme_font_size_override("font_size", t.font_body)
+	mouse_filter = Control.MOUSE_FILTER_IGNORE
+
+	var theme_res := load("res://ui/implant/default_implant.tres") as ImplantTheme
+
+	_panel = ImplantPanel.new()
+	_panel.name = "PromptPanel"
+	_panel.theme_resource = theme_res
+	_panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
+	_panel.set_anchors_preset(Control.PRESET_FULL_RECT)
+	add_child(_panel)
+
+	_row = ImplantDataRow.new("", theme_res.text_primary if theme_res else Color.WHITE)
+	_row.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	_panel.add_component(_row)
 
 
 func _process(_delta: float) -> void:
@@ -63,8 +67,8 @@ func _show_prompt(interaction: Dictionary) -> void:
 	var verb_label: String = verbs[0].get("label", "")
 	var display_text: String = "E - %s" % verb_label
 
-	if _current_target_id != target_id or prompt_label.text != display_text:
-		prompt_label.text = display_text
+	if _current_target_id != target_id or _row.text != display_text:
+		_row.set_content(display_text)
 		_current_target_id = target_id
 
 	if not _is_showing:

client/ui/interaction_prompt.tscn

@@ -2,28 +2,17 @@
 
 [ext_resource type="Script" path="res://ui/interaction_prompt.gd" id="1_prompt"]
 
-[node name="InteractionPrompt" type="PanelContainer"]
+; Interaction prompt — implant-styled (D-169), positioned above DialogueBox, 16px gap
+[node name="InteractionPrompt" type="Control"]
 anchors_preset = 7
 anchor_top = 1.0
 anchor_right = 1.0
 anchor_bottom = 1.0
 offset_left = 200.0
-offset_top = -240.0
+offset_top = -264.0
 offset_right = -200.0
-offset_bottom = -210.0
+offset_bottom = -222.0
 grow_horizontal = 2
 grow_vertical = 0
 mouse_filter = 2
 script = ExtResource("1_prompt")
-
-[node name="MarginContainer" type="MarginContainer" parent="."]
-layout_mode = 2
-theme_override_constants/margin_left = 16
-theme_override_constants/margin_top = 8
-theme_override_constants/margin_right = 16
-theme_override_constants/margin_bottom = 8
-
-[node name="PromptLabel" type="Label" parent="MarginContainer"]
-layout_mode = 2
-horizontal_alignment = 1
-text = ""