fix titles in curves

app.py

@@ -17,13 +17,13 @@ def histogram(img: np.ndarray) -> Curve:
             range=(0, 1)
         )
         hist_curves.append(
-            SingleCurve(bins[:-1], hist, style='rgb'[ch]+"-")
+            SingleCurve(bins[:-1], hist, style='rgb'[ch], linestyle="-")
         )
     hist_curve = Curve(
         hist_curves,
         xlabel="Intensity",
         ylabel="Frequency",
-        title="Histogram"
+        # title="Histogram"
     )
     return hist_curve
 
@@ -84,10 +84,11 @@ def s_curve_visualization(global_params={}) -> Curve:
                                    exposure)
     return Curve(
         [
-            SingleCurve(x, y, style='m-'),
-            SingleCurve(x, x, style='k--'),
+            SingleCurve(x, y, style='m', linestyle='-'),
+            SingleCurve(x, x, style='k', linestyle='--'),
         ],
-        xlabel="Input", ylabel="Output", title="Tone Curve"
+        xlabel="Input", ylabel="Output",
+        title=f"Tone Curve {shadow_boost:.2f}, {highlight_boost:.2f}, {contrast:.2f}, {exposure:.2f}"
     )