feat(weather editor): add filled star for favourites.

src/WeatherEditor/EditorWindow.cpp

@@ -40,21 +40,40 @@ inline void HelpMarker(const char* a_desc)
 	AddTooltip(a_desc, ImGuiHoveredFlags_DelayShort);
 }
 
-void DrawIconStar(ImVec2 center, float radius, ImU32 color, bool /*filled*/)
+void DrawIconStar(ImVec2 center, float radius, ImU32 color, bool filled)
 {
 	auto* drawList = ImGui::GetWindowDrawList();
-	const int numPoints = 5;
-	const float angleStep = 3.14159f / numPoints;
+	constexpr int numPoints = 5;
+	const float angleStep = IM_PI / numPoints;
 	ImVec2 points[10];
 
 	for (int i = 0; i < numPoints * 2; i++) {
-		float angle = -1.57079f + i * angleStep;
+		float angle = -IM_PI * 0.5f + i * angleStep;
 		float r = (i % 2 == 0) ? radius : radius * 0.38f;
 		points[i] = ImVec2(center.x + cosf(angle) * r, center.y + sinf(angle) * r);
 	}
 
-	for (int i = 0; i < 10; i++) {
-		drawList->AddLine(points[i], points[(i + 1) % 10], color, 1.5f);
+	if (filled) {
+		// Disable AA fill temporarily — ImGui adds a 1px fringe around each filled shape
+		// that creates visible seams at the pentagon/triangle boundaries.
+		ImDrawListFlags oldFlags = drawList->Flags;
+		drawList->Flags &= ~ImDrawListFlags_AntiAliasedFill;
+
+		ImVec2 innerPentagon[5];
+		for (int i = 0; i < 5; i++) {
+			innerPentagon[i] = points[i * 2 + 1];  // inner points
+		}
+		drawList->AddConvexPolyFilled(innerPentagon, 5, color);
+		for (int i = 0; i < 5; i++) {
+			drawList->AddTriangleFilled(points[i * 2], points[i * 2 + 1], points[(i * 2 + 9) % 10], color);
+		}
+
+		drawList->Flags = oldFlags;
+
+		// Draw an AA polyline over the outer perimeter to restore smooth edges
+		drawList->AddPolyline(points, 10, color, ImDrawFlags_Closed, 1.5f);
+	} else {
+		drawList->AddPolyline(points, 10, color, ImDrawFlags_Closed, 1.5f);
 	}
 }