debug: add state.json path logging to diagnose save failure

core/state.py

@@ -84,8 +84,15 @@ def save_state(state):
     sp = _state_path()
     state["updated_at"] = datetime.now().isoformat()
     _LAST_STATE = state
-    with open(sp, "w", encoding="utf-8") as f:
-        json.dump(state, f, indent=2, ensure_ascii=False)
+    try:
+        with open(sp, "w", encoding="utf-8") as f:
+            json.dump(state, f, indent=2, ensure_ascii=False)
+    except Exception as e:
+        # Fallback: stderr
+        import sys
+        print(f"[STATE ERROR] Не удалось сохранить state в {sp}: {e}", file=sys.stderr)
+        import traceback
+        traceback.print_exc(file=sys.stderr)
 
 
 def set_stage(stage, **kwargs):
@@ -94,6 +101,47 @@ def set_stage(stage, **kwargs):
     for k, v in kwargs.items():
         state[k] = v
     save_state(state)
+    return state
+
+
+def mark_completed(step):
+    state = load_state()
+    if step not in state["completed_steps"]:
+        state["completed_steps"].append(step)
+    save_state(state)
+
+
+def is_completed(step):
+    return step in load_state().get("completed_steps", [])
+
+
+def set_error(step, stdout, stderr, suggestion=""):
+    state = load_state()
+    state["paused"] = True
+    state["last_error"] = {
+        "step": step,
+        "timestamp": datetime.now().isoformat(),
+        "stdout": stdout,
+        "stderr": stderr,
+        "suggestion": suggestion,
+    }
+    save_state(state)
+
+
+def reset_state(mode=None):
+    """Сбрасывает состояние для нового запуска (source, target или полностью)."""
+    global _LAST_STATE
+    state = load_state()
+    state["stage"] = "INIT"
+    state["mode"] = mode
+    state["completed_steps"] = []
+    state["interrupted_at"] = None
+    state["resumable_hint"] = None
+    state["last_error"] = None
+    state["paused"] = False
+    state["updated_at"] = datetime.now().isoformat()
+    _LAST_STATE = state
+    save_state(state)
 
 
 def mark_completed(step):