refactor: clean CLI taxonomy — canonical subcommands, merged memory.update, no aliases

- calendar: split write → create/read/update/delete/share
- contacts: rename lookup → read
- memory: merge write+forget → update (unified action field in operations)
- Remove all alias/normalization logic from adapter and handlers
- Update tool_postprocessor ui_hints builders to canonical keys
- Remove frontend legacy TOOL_CALL_START/ARGS/END events and ToolCallItem
- Update SKILL.md files and protocol docs
- Update tests and settings screens

backend/tests/unit/v1/agent/test_service.py

@@ -413,7 +413,7 @@ async def test_enqueue_run_rejects_too_many_attachments(monkeypatch) -> None:
 
 
 @pytest.mark.asyncio
-async def test_get_history_snapshot_filters_out_tool_messages() -> None:
+async def test_get_history_snapshot_keeps_tool_messages_for_ui_replay() -> None:
     class _HistoryRepository(_FakeRepository):
         async def get_history_day(
             self,
@@ -446,7 +446,20 @@ async def test_get_history_snapshot_filters_out_tool_messages() -> None:
                                 "tool_name": "calendar_read",
                                 "tool_call_id": "call-1",
                                 "status": "success",
-                                "result": "status=success total=3 returned=3",
+                                "result": {
+                                    "command": "calendar",
+                                    "subcommand": "read",
+                                    "data": {"total": 3, "items": []},
+                                },
+                                "ui_hints": {
+                                    "intent": "status",
+                                    "status": "success",
+                                    "title": "完成",
+                                    "items": [],
+                                    "listItems": [],
+                                    "sections": [],
+                                    "actions": [],
+                                },
                             },
                         },
                         "timestamp": "2026-03-17T09:00:01Z",
@@ -482,7 +495,12 @@ async def test_get_history_snapshot_filters_out_tool_messages() -> None:
         current_user=_user(),
     )
 
-    assert [message.role for message in snapshot.messages] == ["user", "assistant"]
+    assert [message.role for message in snapshot.messages] == [
+        "user",
+        "tool",
+        "assistant",
+    ]
+    assert snapshot.messages[1].ui_schema is not None
 
 
 @pytest.mark.asyncio