Reduce critical curves and caustics overlay linewidth from 2 to 1

Users reported the white tangential and yellow radial critical curves /
caustics drawn over convergence, potential, deflection, and source-plane
panels were too thick to inspect underlying lens-model results. Reduces
the hardcoded matplotlib linewidth in the three `lines=` overlay sites
(autoarray/plot/{array.py,inversion.py,grid.py}) from 2 to 1.

The `lines=` parameter is currently consumed exclusively by critical
curves and caustics across PyAutoGalaxy and PyAutoLens, so the change
targets exactly the reported overlays with no incidental side-effects.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 2 people

autoarray/plot/array.py

@@ -267,7 +267,7 @@ def plot_array(
             if line is not None and len(line) > 0:
                 line = np.asarray(line).reshape(-1, 2)
                 color = line_colors[i] if (line_colors is not None and i < len(line_colors)) else None
-                kw = {"linewidth": 2}
+                kw = {"linewidth": 1}
                 if color is not None:
                     kw["color"] = color
                 ax.plot(line[:, 1], line[:, 0], **kw)

autoarray/plot/grid.py

@@ -151,7 +151,7 @@ def plot_grid(
     if lines is not None:
         for line in lines:
             if line is not None and len(line) > 0:
-                ax.plot(line[:, 1], line[:, 0], linewidth=2)
+                ax.plot(line[:, 1], line[:, 0], linewidth=1)
 
     # --- labels ----------------------------------------------------------------
     apply_labels(ax, title=title, xlabel=xlabel, ylabel=ylabel)

autoarray/plot/inversion.py

@@ -126,7 +126,7 @@ def plot_inversion_reconstruction(
             if line is not None and len(line) > 0:
                 line = np.asarray(line).reshape(-1, 2)
                 color = line_colors[i] if (line_colors is not None and i < len(line_colors)) else None
-                kw = {"linewidth": 2}
+                kw = {"linewidth": 1}
                 if color is not None:
                     kw["color"] = color
                 ax.plot(line[:, 1], line[:, 0], **kw)