Fix gcode parsing for single-line output

app.py

@@ -73,10 +73,21 @@ def gcode_to_svg(gcode: str) -> str:
     x, y = 0.0, 0.0
     pen_down = False
 
+    # Split on newlines first, then also split commands that may be on same line
+    # Handle gcode that's all on one line by splitting on G0/G1/M commands
+    lines = []
     for line in gcode.split("\n"):
         line = line.strip()
-        if not line or line.startswith(";"):
+        if not line:
             continue
+        # Split on gcode commands (G0, G1, G28, M280, etc.)
+        parts = re.split(r'(?=[GM]\d)', line)
+        for part in parts:
+            part = part.strip()
+            if part and not part.startswith(";"):
+                lines.append(part)
+    
+    for line in lines:
 
         # Pen state from M280 servo commands
         if "M280" in line.upper():