fix(client): address PR #65 review — POI key, ToldBy parsing, KG dirty flag

- minimap.gd: fix "poi_category" → "category" key mismatch so POI
  colors and shapes render correctly
- journal_panel.gd: parse ToldBy(N) source format, resolve entity
  names from player_knowledge; move confidence/source labels to
  UIStrings per D-042
- observer/mod.rs: add Changed<KnowledgeGraph> dirty flag to skip
  per-tick KG serialization when unchanged
- types.rs: fix stale version doc comment (13 → 14)

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

client/ui/journal_panel.gd

@@ -19,22 +19,9 @@ extends Control
 const FADE_IN: float = 0.18
 const FADE_OUT: float = 0.25
 
-# D-041 confidence → display label
-const CONFIDENCE_LABELS: Dictionary = {
-	"Direct": "Confirmed",
-	"KnowsDetails": "Detailed",
-	"KnowsOf": "Known",
-	"Suspects": "Unconfirmed",
-}
-
-# D-041 source → display label
-const SOURCE_LABELS: Dictionary = {
-	"DirectObservation": "Observed",
-	"ToldBy": "Told",
-	"Heard": "Overheard",
-	"Inferred": "Inferred",
-	"Background": "Prior",
-}
+# D-041/D-042: confidence and source labels loaded from UIStrings (data/ui-strings.yaml).
+# Keys: knowledge_panel.confidence_{lower} and knowledge_panel.source_{lower}
+# Fallback: raw value if key not found (UIStrings returns the key itself).
 
 @onready var panel: PanelContainer = $PanelContainer
 @onready var title_label: Label = $PanelContainer/MarginContainer/VBoxContainer/TitleLabel
@@ -135,8 +122,8 @@ func _add_entity_entry(entity: Dictionary) -> void:
 		rel_label = relationship  # fallback if key missing
 
 	var state_color: Color = _state_color(state)
-	var conf_label: String = CONFIDENCE_LABELS.get(confidence, confidence)
-	var src_label: String = SOURCE_LABELS.get(source, source)
+	var conf_label: String = UIStrings.get_text("knowledge_panel.confidence_%s" % confidence.to_lower())
+	var src_label: String = _resolve_source_label(source)
 
 	# Build BBCode:
 	# [color=#hex][b]Name[/b][/color]  [color=#rel_hex]Status[/color]
@@ -174,6 +161,39 @@ func _add_entity_entry(entity: Dictionary) -> void:
 	entries_container.add_child(spacer)
 
 
+## Resolve a source string from the server into a human-readable label.
+## Handles plain keys ("DirectObservation", "Heard") and ToldBy(N) format.
+## ToldBy(N) looks up entity_id N in player_knowledge.entities for the name.
+func _resolve_source_label(source: String) -> String:
+	if source.is_empty():
+		return ""
+
+	# ToldBy(entity_id) format — e.g. "ToldBy(12)"
+	if source.begins_with("ToldBy(") and source.ends_with(")"):
+		var id_str: String = source.substr(7, source.length() - 8)
+		var entity_id: int = id_str.to_int()
+		var name := _entity_name_for_id(entity_id)
+		var told_prefix: String = UIStrings.get_text("knowledge_panel.source_toldby")
+		if told_prefix == "knowledge_panel.source_toldby":
+			told_prefix = "Told"
+		return "%s: %s" % [told_prefix, name]
+
+	# Plain source key — look up UIStrings
+	var key: String = "knowledge_panel.source_%s" % source.to_lower()
+	return UIStrings.get_text(key)
+
+
+## Look up an entity name by stable ID from GameState.player_knowledge.entities.
+func _entity_name_for_id(entity_id: int) -> String:
+	var knowledge: Variant = GameState.player_knowledge
+	if knowledge == null:
+		return "#%d" % entity_id
+	for entity in knowledge.get("entities", []):
+		if entity is Dictionary and int(entity.get("entity_id", -1)) == entity_id:
+			return entity.get("name", "#%d" % entity_id)
+	return "#%d" % entity_id
+
+
 func _state_color(state: String) -> Color:
 	match state:
 		"Contradicted":

client/ui/minimap.gd

@@ -91,7 +91,7 @@ func _draw() -> void:
 		var dx: float = float(poi.x) - px
 		var dy: float = float(poi.y) - py
 		var dist: float = sqrt(dx * dx + dy * dy)
-		var category: String = poi.get("poi_category", "")
+		var category: String = poi.get("category", "")
 		var color: Color = _category_color(category)
 
 		if dist < 0.01: