feat: stabilize cold display runtime deployment

tests/test_config.py

@@ -4,7 +4,7 @@ import tempfile
 import unittest
 from pathlib import Path
 
-from cold_display_guard.config import load_settings
+from cold_display_guard.config import load_settings, save_config_document
 
 
 class ConfigTests(unittest.TestCase):
@@ -33,6 +33,95 @@ cols = 2
         self.assertEqual(settings.trash_confirmation_seconds, 4)
         self.assertEqual(settings.zone_ids, ("r1c1", "r1c2"))
 
+    def test_loads_numeric_zone_ids_for_custom_zone_count(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "config.toml"
+            path.write_text(
+                """
+camera_id = "cam_numeric"
+
+[thresholds]
+max_dwell_seconds = 1200
+trash_confirmation_seconds = 120
+
+[layout]
+zone_count = 3
+zone_ids = ["1", "2", "3"]
+""".strip(),
+                encoding="utf-8",
+            )
+
+            settings = load_settings(path)
+
+        self.assertEqual(settings.camera_id, "cam_numeric")
+        self.assertEqual(settings.max_dwell_seconds, 1200)
+        self.assertEqual(settings.zone_ids, ("1", "2", "3"))
+
+    def test_rejects_more_than_ten_numeric_food_zones(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "config.toml"
+            path.write_text(
+                """
+[layout]
+zone_ids = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"]
+""".strip(),
+                encoding="utf-8",
+            )
+
+            with self.assertRaisesRegex(ValueError, "1 to 10"):
+                load_settings(path)
+
+    def test_loads_numeric_zone_ids_from_zone_count_without_explicit_ids(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "config.toml"
+            path.write_text(
+                """
+[layout]
+zone_count = 4
+""".strip(),
+                encoding="utf-8",
+            )
+
+            settings = load_settings(path)
+
+        self.assertEqual(settings.zone_ids, ("1", "2", "3", "4"))
+
+    def test_rejects_numeric_zone_count_that_conflicts_with_zone_ids(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "config.toml"
+            path.write_text(
+                """
+[layout]
+zone_count = 5
+zone_ids = ["1", "2", "3"]
+""".strip(),
+                encoding="utf-8",
+            )
+
+            with self.assertRaisesRegex(ValueError, "zone_count"):
+                load_settings(path)
+
+    def test_save_config_document_round_trips_zone_count_and_numeric_labels(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "config.toml"
+            save_config_document(
+                path,
+                {
+                    "layout": {"zone_count": 2, "zone_ids": ["1", "2"]},
+                    "zones": [
+                        {"id": "1", "label": "区域 1", "polygon": [[0, 0], [1, 0], [1, 1]]},
+                        {"id": "2", "label": "区域 2", "polygon": [[0, 0], [0.5, 0], [0.5, 1]]},
+                    ],
+                    "trash": {"roi": [[0, 0], [1, 0], [1, 1]]},
+                },
+            )
+            text = path.read_text(encoding="utf-8")
+
+        self.assertIn("zone_count = 2", text)
+        self.assertIn('label = "区域 1"', text)
+        self.assertIn("[trash]", text)
+        self.assertNotIn('"trash"', text.split("[layout]", maxsplit=1)[1].split("[[zones]]", maxsplit=1)[0])
+
 
 if __name__ == "__main__":
     unittest.main()