test: Phase 3 添加 smoke test、CI 与 run-daily 去重锁

离线 mock 测试 generate 产出，GitHub Actions 跑 pytest，30 分钟内重复调度自动 skip。

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_smoke.py

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+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+
+FIXTURES = Path(__file__).parent / "fixtures"
+
+
+def _sample_github_repo() -> dict:
+    return {
+        "repo": "owner/sample",
+        "url": "https://github.com/owner/sample",
+        "description": "Sample repository for smoke tests.",
+        "language": "Python",
+        "stars_today_fmt": "120",
+        "total_stars_fmt": "1.2K",
+        "created_at": "2026-06-01",
+    }
+
+
+def test_format_installs():
+    from shared.skills_data import format_installs
+
+    assert format_installs(999) == "999"
+    assert format_installs(18000) == "18.0K"
+    assert format_installs(2_500_000) == "2.5M"
+
+
+def test_generate_report_offline(
+    skills_feed,
+    fixed_cst,
+    isolated_output,
+    offline_generate_env,
+    monkeypatch,
+):
+    import daily.generate as generate
+
+    monkeypatch.setattr(generate, "load_feed", lambda force=False: skills_feed)
+    monkeypatch.setattr(generate, "fetch_github_trending", lambda n: [_sample_github_repo()])
+    monkeypatch.setattr(generate, "fetch_emerging_repos", lambda n, exclude=None: [])
+    monkeypatch.setattr(generate, "fetch_topic_hot_repos", lambda n, exclude=None: ("llm", []))
+    monkeypatch.setattr(generate, "_now_cst", lambda: fixed_cst)
+
+    _, wecom_md, out_md, out_wecom = generate.generate_report()
+
+    assert out_md.exists()
+    assert out_wecom.exists()
+    assert "早报" in out_md.read_text(encoding="utf-8")
+    assert wecom_md.strip()
+    assert "📰" in wecom_md
+
+    data_path = isolated_output / "2026-07-03.data.json"
+    assert data_path.exists()
+    payload = json.loads(data_path.read_text(encoding="utf-8"))
+    assert payload["meta"]["report_mode"] == "classic"
+    assert payload["data"]["date"] == "2026-07-03"
+    assert len(payload["data"]["skills_trending"]) >= 1
+    assert len(payload["data"]["skills_hot"]) >= 1
+
+
+def test_rss_fixture_is_well_formed():
+    xml = (FIXTURES / "sample-rss.xml").read_text(encoding="utf-8")
+    assert "Sample AI headline" in xml
+    assert "<item>" in xml