Add Shape 2 and Shape 3 G-code sources to visualization tab

The G-Code source selector now offers "Use Shape 2 G-Code" and
"Use Shape 3 G-Code" alongside Shape 1 and file upload, each pulling
the corresponding generated file from the TIFF Slices to GCode tab.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app.py

@@ -983,6 +983,8 @@ def run_all_tiff_to_gcode(
 
 
 GCODE_SOURCE_SHAPE1 = "Use Shape 1 G-Code"
+GCODE_SOURCE_SHAPE2 = "Use Shape 2 G-Code"
+GCODE_SOURCE_SHAPE3 = "Use Shape 3 G-Code"
 GCODE_SOURCE_UPLOAD = "Upload G-Code file"
 
 
@@ -994,6 +996,8 @@ def render_toolpath(
     source: str,
     uploaded_path: str | None,
     shape1_path: str | None,
+    shape2_path: str | None,
+    shape3_path: str | None,
     travel_opacity: float = 0.25,
     print_opacity: float = 1.0,
     travel_color: str = "#969696",
@@ -1007,9 +1011,14 @@ def render_toolpath(
         if not path:
             return None, "No G-code file uploaded yet.", {}
     else:
-        path = shape1_path
+        shape_paths = {
+            GCODE_SOURCE_SHAPE1: (shape1_path, 1),
+            GCODE_SOURCE_SHAPE2: (shape2_path, 2),
+            GCODE_SOURCE_SHAPE3: (shape3_path, 3),
+        }
+        path, shape_num = shape_paths.get(source, (shape1_path, 1))
         if not path:
-            return None, "No Shape 1 G-code available yet. Generate it on the TIFF Slices to GCode tab first.", {}
+            return None, f"No Shape {shape_num} G-code available yet. Generate it on the TIFF Slices to GCode tab first.", {}
 
     try:
         text = Path(path).read_text()
@@ -1037,6 +1046,8 @@ def render_toolpath_lines(
     source: str,
     uploaded_path: str | None,
     shape1_path: str | None,
+    shape2_path: str | None,
+    shape3_path: str | None,
     travel_opacity: float,
     print_opacity: float,
     travel_color: str,
@@ -1045,8 +1056,9 @@ def render_toolpath_lines(
     travel_width: float,
 ) -> tuple[Any, str, dict, str, dict[str, Any], dict[str, Any]]:
     figure, status, parsed = render_toolpath(
-        source, uploaded_path, shape1_path, travel_opacity, print_opacity,
-        travel_color, print_color, print_width, travel_width, tube=False,
+        source, uploaded_path, shape1_path, shape2_path, shape3_path,
+        travel_opacity, print_opacity, travel_color, print_color,
+        print_width, travel_width, tube=False,
     )
     return figure, status, parsed, "line", gr.update(visible=False), gr.update(visible=False)
 
@@ -1055,6 +1067,8 @@ def render_toolpath_tubes(
     source: str,
     uploaded_path: str | None,
     shape1_path: str | None,
+    shape2_path: str | None,
+    shape3_path: str | None,
     travel_opacity: float,
     print_opacity: float,
     travel_color: str,
@@ -1063,8 +1077,9 @@ def render_toolpath_tubes(
     travel_width: float,
 ) -> tuple[Any, str, dict, str, dict[str, Any], dict[str, Any]]:
     figure, status, parsed = render_toolpath(
-        source, uploaded_path, shape1_path, travel_opacity, print_opacity,
-        travel_color, print_color, print_width, travel_width, tube=True,
+        source, uploaded_path, shape1_path, shape2_path, shape3_path,
+        travel_opacity, print_opacity, travel_color, print_color,
+        print_width, travel_width, tube=True,
     )
     # Playback controls and mm width sliders only apply to the tube figure.
     has_animation = bool(parsed.get("point_count"))
@@ -1076,6 +1091,8 @@ def rerender_toolpath_current_mode(
     source: str,
     uploaded_path: str | None,
     shape1_path: str | None,
+    shape2_path: str | None,
+    shape3_path: str | None,
     travel_opacity: float,
     print_opacity: float,
     travel_color: str,
@@ -1084,9 +1101,9 @@ def rerender_toolpath_current_mode(
     travel_width: float,
 ) -> tuple[Any, str, dict]:
     return render_toolpath(
-        source, uploaded_path, shape1_path, travel_opacity, print_opacity,
-        travel_color, print_color, print_width, travel_width,
-        tube=(mode != "line"),
+        source, uploaded_path, shape1_path, shape2_path, shape3_path,
+        travel_opacity, print_opacity, travel_color, print_color,
+        print_width, travel_width, tube=(mode != "line"),
     )
 
 
@@ -1586,7 +1603,12 @@ def build_demo() -> gr.Blocks:
             # --- G-code source selection, above the controls/chart area ---
             with gr.Row():
                 gcode_source = gr.Radio(
-                    choices=[GCODE_SOURCE_SHAPE1, GCODE_SOURCE_UPLOAD],
+                    choices=[
+                        GCODE_SOURCE_SHAPE1,
+                        GCODE_SOURCE_SHAPE2,
+                        GCODE_SOURCE_SHAPE3,
+                        GCODE_SOURCE_UPLOAD,
+                    ],
                     value=GCODE_SOURCE_SHAPE1,
                     label="G-Code source",
                 )
@@ -1680,7 +1702,7 @@ def build_demo() -> gr.Blocks:
                 outputs=[upload_col],
                 queue=False,
             )
-            render_inputs = [gcode_source, gcode_upload, gcode_file_1, travel_opacity_slider, print_opacity_slider, travel_color_picker, print_color_picker, print_width_slider, travel_width_slider]
+            render_inputs = [gcode_source, gcode_upload, gcode_file_1, gcode_file_2, gcode_file_3, travel_opacity_slider, print_opacity_slider, travel_color_picker, print_color_picker, print_width_slider, travel_width_slider]
             render_line_button.click(
                 fn=render_toolpath_lines,
                 inputs=render_inputs,