feat(client): initialize Godot 4 project boilerplate (epic #277)

Set up the complete Godot 4.6 client foundation as a pure renderer (D-020):
- project.godot with 2D rendering, autoloads, input actions
- Main scene: Game > World (TileMapLayer, Entities, FogOverlay) + Camera2D + UILayer
- Autoloads: SimBridge (connection state machine + test mode), GameState, InputMapper
- Rendering stubs: WorldRenderer, EntityRenderer, FogRenderer
- UI stubs: HUD (health/perception/time), Minimap, MonologueDisplay
- Input mapping: WASD/arrows, E (interact), Tab (perception), Esc (menu), Space (pause)
- gdUnit4 smoke tests: scene loads, autoloads registered (2/2 passing)

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

client/ui/hud.gd

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+extends Control
+
+# HUD — displays player health, perception mode, time, etc.
+
+@onready var health_label: Label = $MarginContainer/VBoxContainer/HealthLabel
+@onready var perception_label: Label = $MarginContainer/VBoxContainer/PerceptionLabel
+@onready var time_label: Label = $MarginContainer/VBoxContainer/TimeLabel
+
+func _ready() -> void:
+	print("HUD: Initialized")
+
+# Update HUD from snapshot data
+func update_from_hud_data(data: Dictionary) -> void:
+	# Update perception mode display
+	if data.has("perception_mode"):
+		perception_label.text = "Mode: " + data.perception_mode.capitalize()
+
+	# Update time display (per D-031)
+	if data.has("time"):
+		time_label.text = "Time: " + data.time
+
+# Update player health (from player data, not hud_data)
+func update_health(health: int) -> void:
+	health_label.text = "Health: " + str(health)

client/ui/hud.gd.uid

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+uid://dgy4mkke84c70

client/ui/hud.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://cq1y5w3hmxr8b"]
+
+[ext_resource type="Script" path="res://ui/hud.gd" id="1_hud"]
+
+[node name="HUD" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+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"

client/ui/minimap.gd

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+extends Control
+
+# Minimap — small viewport showing local area
+# Placeholder implementation for now
+
+@onready var viewport_container: SubViewportContainer = $SubViewportContainer
+
+func _ready() -> void:
+	print("Minimap: Initialized")
+
+# Update minimap view (stub)
+func update_minimap(player_pos: Vector2, entities: Array) -> void:
+	# TODO: Render minimap view
+	# This will show a top-down view of the local area
+	pass

client/ui/minimap.gd.uid

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+uid://b6bqe4ydk8evo

client/ui/minimap.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://b5x7k2mwpq3vc"]
+
+[ext_resource type="Script" path="res://ui/minimap.gd" id="1_minimap"]
+
+[node name="Minimap" type="Control"]
+layout_mode = 3
+anchors_preset = 1
+anchor_left = 1.0
+anchor_right = 1.0
+offset_left = -200.0
+offset_bottom = 200.0
+grow_horizontal = 0
+mouse_filter = 2
+script = ExtResource("1_minimap")
+
+[node name="SubViewportContainer" type="SubViewportContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Background" type="ColorRect" parent="SubViewportContainer"]
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_right = 200.0
+offset_bottom = 200.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0.1, 0.1, 0.1, 0.7)

client/ui/monologue_display.gd

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+extends Control
+
+# Internal monologue display (per D-015)
+# Shows character's internal thoughts as text overlay
+
+@onready var text_panel: PanelContainer = $PanelContainer
+@onready var text_label: RichTextLabel = $PanelContainer/MarginContainer/RichTextLabel
+
+var fade_timer: float = 0.0
+var fade_duration: float = 5.0  # Display duration before fade
+var is_visible: bool = false
+
+func _ready() -> void:
+	print("MonologueDisplay: Initialized")
+	text_panel.modulate.a = 0.0
+	is_visible = false
+
+func _process(delta: float) -> void:
+	# Auto-fade after display
+	if is_visible:
+		fade_timer += delta
+		if fade_timer >= fade_duration:
+			_fade_out()
+
+# Show internal monologue text
+func show_monologue(text: String, duration: float = 5.0) -> void:
+	text_label.text = text
+	fade_duration = duration
+	fade_timer = 0.0
+	is_visible = true
+
+	# Fade in
+	var tween = create_tween()
+	tween.tween_property(text_panel, "modulate:a", 1.0, 0.3)
+
+# Fade out the monologue
+func _fade_out() -> void:
+	if not is_visible:
+		return
+
+	is_visible = false
+	var tween = create_tween()
+	tween.tween_property(text_panel, "modulate:a", 0.0, 0.5)

client/ui/monologue_display.gd.uid

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+uid://befq2r47mmw08

client/ui/monologue_display.tscn

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+[gd_scene load_steps=2 format=3 uid="uid://bj8y4v2nx7k5m"]
+
+[ext_resource type="Script" path="res://ui/monologue_display.gd" id="1_monologue"]
+
+[node name="MonologueDisplay" type="Control"]
+layout_mode = 3
+anchors_preset = 12
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_top = -150.0
+grow_horizontal = 2
+grow_vertical = 0
+mouse_filter = 2
+script = ExtResource("1_monologue")
+
+[node name="PanelContainer" type="PanelContainer" parent="."]
+layout_mode = 1
+anchors_preset = 10
+anchor_right = 1.0
+offset_left = 100.0
+offset_right = -100.0
+offset_bottom = 120.0
+grow_horizontal = 2
+
+[node name="MarginContainer" type="MarginContainer" parent="PanelContainer"]
+layout_mode = 2
+theme_override_constants/margin_left = 16
+theme_override_constants/margin_top = 12
+theme_override_constants/margin_right = 16
+theme_override_constants/margin_bottom = 12
+
+[node name="RichTextLabel" type="RichTextLabel" parent="PanelContainer/MarginContainer"]
+layout_mode = 2
+bbcode_enabled = true
+text = "Internal monologue will appear here..."
+fit_content = true
+scroll_active = false