feat(planner): persist reusable action semantics

tests/test_cloud_planner_decision_endpoint.py

@@ -96,7 +96,14 @@ def _decision_payload(**overrides: object) -> dict[str, object]:
 
 def test_authenticated_host_resolves_planner_decision(tmp_path) -> None:
     fake_client = _FakeToolCallingClient(
-        decision=ToolCallDecision(tool_name="tap", arguments={"x": 1, "y": 2})
+        decision=ToolCallDecision(
+            tool_name="tap",
+            arguments={"x": 1, "y": 2},
+            text_output="The login button is visible. Opening it.",
+            thinking="The next screen should be the account page.",
+            purpose="Open the login screen.",
+            expected_outcome="The login form is visible.",
+        )
     )
     client, fake_client, _pool = _build_client(tmp_path, fake_client=fake_client)
 
@@ -107,7 +114,14 @@ def test_authenticated_host_resolves_planner_decision(tmp_path) -> None:
     )
 
     assert response.status_code == 200
-    assert response.json() == {"tool_name": "tap", "arguments": {"x": 1, "y": 2}}
+    assert response.json() == {
+        "tool_name": "tap",
+        "arguments": {"x": 1, "y": 2},
+        "rationale": "The login button is visible. Opening it.",
+        "thinking": "The next screen should be the account page.",
+        "purpose": "Open the login screen.",
+        "expected_outcome": "The login form is visible.",
+    }
     assert len(fake_client.calls) == 1
     assert fake_client.calls[0]["system_prompt"] == "you are a planner"
     assert fake_client.calls[0]["timeout"] == 30.0
@@ -232,7 +246,14 @@ def _seed_attempt(pool: DevicePool, task_id: str, host_id: str = "host-a") -> No
 
 def test_successful_decision_is_persisted_with_correct_fields(tmp_path) -> None:
     fake_client = _FakeToolCallingClient(
-        decision=ToolCallDecision(tool_name="tap", arguments={"x": 10, "y": 20})
+        decision=ToolCallDecision(
+            tool_name="tap",
+            arguments={"x": 10, "y": 20},
+            text_output="The settings tab is visible. Opening it.",
+            thinking="A tap should navigate to settings.",
+            purpose="Open settings.",
+            expected_outcome="The settings page is visible.",
+        )
     )
     client, fake_client, pool = _build_client(tmp_path, fake_client=fake_client)
     _seed_attempt(pool, "task-log-1")
@@ -259,6 +280,10 @@ def test_successful_decision_is_persisted_with_correct_fields(tmp_path) -> None:
     assert row.tool_name == "tap"
     assert '"x": 10' in row.arguments_json
     assert '"y": 20' in row.arguments_json
+    assert row.rationale == "The settings tab is visible. Opening it."
+    assert row.thinking == "A tap should navigate to settings."
+    assert row.purpose == "Open settings."
+    assert row.expected_outcome == "The settings page is visible."
 
 
 def test_failed_decision_persists_nothing(tmp_path) -> None: