Improve AI daily report operations and dedupe observability

tests/test_audit.py

@@ -0,0 +1,42 @@
+import json
+import tempfile
+import unittest
+from pathlib import Path
+
+from ai_daily_report.audit import render_markdown, summarize_reports
+
+
+class AuditTests(unittest.TestCase):
+    def test_summarizes_weekly_metrics(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            run_dir = Path(tmp) / "2026-06-10"
+            run_dir.mkdir()
+            (run_dir / "run_report.json").write_text(
+                json.dumps(
+                    {
+                        "quality_gate": {
+                            "source_failures": [{"source": "橘鸦AI早报"}],
+                            "warnings": ["enabled_source_failed:橘鸦AI早报:error"],
+                            "blocking_errors": [],
+                        },
+                        "stage2_8": {"candidate_group_count": 6},
+                        "stage4": {"fallback_count": 2, "output_count": 20},
+                        "stage5": {"output_count": 20},
+                        "stage8": {"status": "ok", "slug": "ai-2026-06-10"},
+                    }
+                ),
+                encoding="utf-8",
+            )
+
+            summary = summarize_reports(Path(tmp), limit_days=7)
+            markdown = render_markdown(summary)
+
+        self.assertEqual(summary["run_count"], 1)
+        self.assertEqual(summary["totals"]["source_failures"], 1)
+        self.assertEqual(summary["totals"]["duplicate_candidates"], 6)
+        self.assertEqual(summary["totals"]["fallback_ratio"], 0.1)
+        self.assertIn("AI日报每周自动审计报告", markdown)
+
+
+if __name__ == "__main__":
+    unittest.main()