feat: add standard init-db CLI for host install schema ensure

tests/test_cli_smoke.py

@@ -27,6 +27,7 @@ class TestCliSmoke(unittest.TestCase):
         out = buf.getvalue()
         self.assertIn("通用业务技能模板", out)
         self.assertIn("health", out)
+        self.assertIn("init-db", out)
 
     def test_health_zero(self) -> None:
         old_record = os.environ.get("OPENCLAW_RECORD_VIDEO")
@@ -57,6 +58,26 @@ class TestCliSmoke(unittest.TestCase):
         self.assertIn("skill", payload)
         self.assertEqual(payload["skill"], SKILL_SLUG)
 
+    def test_init_db_creates_database_and_is_idempotent(self) -> None:
+        with IsolatedDataRoot(user_id="_cli_init_db"):
+            config.reset_cache()
+            buf = io.StringIO()
+            with redirect_stdout(buf), redirect_stderr(io.StringIO()):
+                rc = main(["init-db"])
+            self.assertEqual(rc, 0)
+            payload = json.loads(buf.getvalue().strip())
+            self.assertTrue(payload["ok"])
+            self.assertEqual(payload["skill"], SKILL_SLUG)
+            self.assertTrue(os.path.isfile(payload["db_path"]))
+
+            buf2 = io.StringIO()
+            with redirect_stdout(buf2), redirect_stderr(io.StringIO()):
+                rc2 = main(["init-db"])
+            self.assertEqual(rc2, 0)
+            payload2 = json.loads(buf2.getvalue().strip())
+            self.assertTrue(payload2["ok"])
+            self.assertEqual(payload2["db_path"], payload["db_path"])
+
     def test_logs_empty_returns_zero(self) -> None:
         with IsolatedDataRoot():
             buf = io.StringIO()