🐛 fix(gui): allow all steps to be runnable independently

- Remove dependency chain that prevented steps 2,3,4 from running
- All steps now have can_run=True
- Steps can be executed individually without running previous steps

src/gui/main_window.py

@@ -746,23 +746,17 @@ class MainWindow(ctk.CTk):
     def _update_step_dependencies(self) -> None:
         """Update step run-ability based on dependency status.
 
-        Step 0 (env) is always runnable.
-        Step N is runnable only if all steps before it have completed.
+        All steps are runnable independently.
         """
         for i, step in enumerate(self._steps):
-            if i == 0:
-                step.set_can_run(True)
-                if self._step_statuses.get(i) == "pending":
-                    step.set_status("pending")
-            else:
-                prev_completed = all(
-                    self._step_statuses.get(j) == "complete"
-                    for j in range(i)
-                )
-                step.set_can_run(prev_completed)
-                status = self._step_statuses.get(i, "pending")
-                if not prev_completed and status == "pending":
-                    step.set_status("disabled")
+            step.set_can_run(True)
+            status = self._step_statuses.get(i, "pending")
+            if status == "pending":
+                step.set_status("pending")
+            elif status == "complete":
+                step.set_status("complete")
+            elif status == "error":
+                step.set_status("error")
 
     def _execute_step(self, index: int) -> None:
         """Execute a single step independently.