feat(ui): dialogue UI hardening and examine result overlay (#174)

Confrontation options use RichTextLabel with italic tags for
first-person voice (D-063). Examine result overlay auto-dismisses
after 5s with confidence-based color tinting. Dismisses when
dialogue opens. D-062 invisible locked options confirmed correct.

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

client/ui/examine_display.gd

@@ -0,0 +1,88 @@
+extends Control
+
+## Examine result display — #174, D-061 adjacent.
+##
+## Shows the character-filtered text returned by the Examine verb (#242).
+## Non-interactive overlay. Auto-dismisses after DISMISS_DELAY seconds.
+## Diegetic: reads as the neural insert processing what the character observed.
+##
+## Positioned in InsertOverlay (CanvasLayer 10, z-layer 6).
+## Only one examine result is shown at a time — new result replaces old.
+
+const DISMISS_DELAY: float = 5.0   # Auto-dismiss after 5 seconds
+const FADE_IN: float = 0.18
+const FADE_OUT: float = 0.35
+
+# Confidence → alpha modifier: Direct is brightest, Suspects is dimmest
+const CONFIDENCE_ALPHA: Dictionary = {
+	"Direct": 1.0,
+	"KnowsDetails": 0.9,
+	"KnowsOf": 0.75,
+	"Suspects": 0.6,
+}
+
+@onready var panel: PanelContainer = $PanelContainer
+@onready var text_label: RichTextLabel = $PanelContainer/MarginContainer/TextLabel
+
+var _dismiss_tween: Tween = null
+var _active: bool = false
+
+func _ready() -> void:
+	mouse_filter = Control.MOUSE_FILTER_IGNORE
+	modulate.a = 0.0
+	visible = false
+
+
+## Show an examine result. Called from main.gd when GameState.current_examine_result is set.
+## result: {entity_id, text, confidence}
+func show_result(result: Dictionary) -> void:
+	var text: String = result.get("text", "")
+	var confidence: String = result.get("confidence", "KnowsOf")
+
+	if text.is_empty():
+		return
+
+	# Cancel any in-progress dismiss
+	if _dismiss_tween and _dismiss_tween.is_valid():
+		_dismiss_tween.kill()
+
+	# Apply confidence-based alpha to the insert color
+	var alpha: float = CONFIDENCE_ALPHA.get(confidence, 0.75)
+	var col := Color(Constants.INSERT_COLOR_TEXT.r, Constants.INSERT_COLOR_TEXT.g,
+		Constants.INSERT_COLOR_TEXT.b, alpha)
+	text_label.add_theme_color_override("default_color", col)
+	text_label.text = text
+
+	visible = true
+	_active = true
+	modulate.a = 0.0
+
+	# Fade in, then auto-dismiss
+	_dismiss_tween = create_tween()
+	_dismiss_tween.tween_property(self, "modulate:a", 1.0, FADE_IN)
+	_dismiss_tween.tween_interval(DISMISS_DELAY)
+	_dismiss_tween.tween_callback(_start_fade_out)
+
+
+func _start_fade_out() -> void:
+	if not _active:
+		return
+	var t := create_tween()
+	t.tween_property(self, "modulate:a", 0.0, FADE_OUT)
+	t.tween_callback(func():
+		visible = false
+		_active = false
+	)
+
+
+## Dismiss immediately (e.g. when dialogue opens).
+func dismiss() -> void:
+	if not _active:
+		return
+	if _dismiss_tween and _dismiss_tween.is_valid():
+		_dismiss_tween.kill()
+	_start_fade_out()
+
+
+func is_active() -> bool:
+	return _active