feat(runtime): add user-controlled turn recovery

tests/agent/test_loop_save_turn.py

@@ -36,6 +36,7 @@ from nanobot.session.keys import (
     UNIFIED_SESSION_KEY,
 )
 from nanobot.session.manager import Session
+from nanobot.session.recovery import PENDING_FOLLOWUP_ID_KEY, PENDING_FOLLOWUPS_KEY
 from nanobot.session.turn_continuation import (
     INTERNAL_CONTINUATION_META,
     INTERNAL_CONTINUATION_RUN_STARTED_AT_META,
@@ -161,6 +162,35 @@ def test_persist_cron_turn_uses_distinct_history_marker(tmp_path: Path) -> None:
     assert message["cron_prompt_ref"] == prompt_ref
 
 
+def test_persist_user_message_acknowledges_durable_followup(tmp_path: Path) -> None:
+    loop = _make_full_loop(tmp_path)
+    session = loop.sessions.get_or_create("websocket:chat")
+    session.metadata[PENDING_FOLLOWUPS_KEY] = [
+        {
+            "id": "followup-1",
+            "sender_id": "user",
+            "chat_id": "chat",
+            "content": "queued while busy",
+            "media": [],
+            "metadata": {},
+        }
+    ]
+
+    persisted = loop._persist_user_message_early(
+        InboundMessage(
+            channel="websocket",
+            sender_id="user",
+            chat_id="chat",
+            content="queued while busy",
+            metadata={PENDING_FOLLOWUP_ID_KEY: "followup-1"},
+        ),
+        session,
+    )
+
+    assert persisted is True
+    assert PENDING_FOLLOWUPS_KEY not in session.metadata
+
+
 def test_persist_local_trigger_turn_uses_hidden_automation_marker(tmp_path: Path) -> None:
     loop = _make_full_loop(tmp_path)
     session = loop.sessions.get_or_create("websocket:auto")
@@ -381,6 +411,34 @@ def test_save_turn_keeps_multimodal_runtime_context_for_model_replay() -> None:
     assert public_history_message(session.messages[0])["content"] == []
 
 
+def test_save_turn_acknowledges_every_merged_recovery_followup() -> None:
+    """Persisting a merged injected row retires every durable follow-up ID."""
+    loop = _mk_loop()
+    session = Session(
+        key="test:recovery-followups",
+        metadata={
+            PENDING_FOLLOWUPS_KEY: [
+                {"id": "first"},
+                {"id": "second"},
+            ]
+        },
+    )
+
+    loop._save_turn(
+        session,
+        [
+            {
+                "role": "user",
+                "content": "first\n\nsecond",
+                PENDING_FOLLOWUP_ID_KEY: ["first", "second"],
+            }
+        ],
+        skip=0,
+    )
+
+    assert PENDING_FOLLOWUPS_KEY not in session.metadata
+
+
 def test_save_turn_keeps_image_placeholder_and_runtime_context() -> None:
     loop = _mk_loop()
     session = Session(key="test:image")