feat(system):优化后端

1.新增后端测试
2.增加了后端的加密
3.增加了i18n（国际化）

tests/unit/test_workflow_validator.py

@@ -0,0 +1,88 @@
+"""``KiloStarWorkflow`` 的 ``validate_workflow_integrity`` 校验器覆盖。"""
+
+import pytest
+from pydantic import ValidationError
+
+from kilostar.core.work.workflow.workflow import KiloStarWorkflow, WorkflowStep
+from kilostar.core.work.workflow.model import LogicGate, WorkflowMetadata
+
+
+def _step(
+    n: int, *, fail_target: str | None = None, name: str | None = None
+) -> WorkflowStep:
+    return WorkflowStep(
+        step=n,
+        name=name or f"step_{n}",
+        action="noop",
+        logic_gate=LogicGate(if_fail=fail_target) if fail_target else None,
+    )
+
+
+def test_valid_workflow_passes():
+    wf = KiloStarWorkflow(
+        title="t",
+        work_link=[
+            _step(1),
+            _step(2, fail_target="jump_to_step_1"),
+            _step(3),
+        ],
+        workflow_metadata=WorkflowMetadata(),
+    )
+    assert wf.title == "t"
+    assert len(wf.work_link) == 3
+
+
+def test_non_continuous_steps_rejected():
+    with pytest.raises(ValidationError) as exc:
+        KiloStarWorkflow(
+            title="t",
+            work_link=[_step(1), _step(3)],
+            workflow_metadata=WorkflowMetadata(),
+        )
+    assert "工作链步数不连续" in str(exc.value)
+
+
+def test_jump_target_out_of_range_rejected():
+    with pytest.raises(ValidationError) as exc:
+        KiloStarWorkflow(
+            title="t",
+            work_link=[
+                _step(1),
+                _step(2, fail_target="jump_to_step_99"),
+            ],
+            workflow_metadata=WorkflowMetadata(),
+        )
+    assert "越界" in str(exc.value)
+
+
+def test_jump_target_below_one_rejected():
+    with pytest.raises(ValidationError) as exc:
+        KiloStarWorkflow(
+            title="t",
+            work_link=[
+                _step(1, fail_target="jump_to_step_0"),
+            ],
+            workflow_metadata=WorkflowMetadata(),
+        )
+    assert "越界" in str(exc.value)
+
+
+def test_logic_gate_without_jump_is_ignored():
+    """没有 ``jump_to_step_`` 前缀的 if_fail 不进入越界判断。"""
+    wf = KiloStarWorkflow(
+        title="t",
+        work_link=[
+            _step(1, fail_target="abort"),
+        ],
+        workflow_metadata=WorkflowMetadata(),
+    )
+    assert wf.work_link[0].logic_gate.if_fail == "abort"
+
+
+def test_default_trace_id_is_set():
+    wf = KiloStarWorkflow(
+        title="t",
+        work_link=[_step(1)],
+        workflow_metadata=WorkflowMetadata(),
+    )
+    assert wf.trace_id and isinstance(wf.trace_id, str)