feat(insta-lab): GET /keywords/ranked + POST /slates/{id}/decision

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

insta-lab/tests/test_ranked_decision_api.py

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+import pytest
+from fastapi.testclient import TestClient
+from app import db, config, selection_judge
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    monkeypatch.setattr(config, "DB_PATH", str(tmp_path / "insta.db"))
+    monkeypatch.setattr(db, "DB_PATH", str(tmp_path / "insta.db"))
+    monkeypatch.setattr(selection_judge, "judge_candidates", lambda c: {})
+    db.init_db()
+    from app.main import app
+    return TestClient(app)
+
+
+def test_ranked_returns_sorted_eligible(client, monkeypatch):
+    db.add_trending_keyword({"keyword": "금리", "category": "economy", "score": 0.9})
+    r = client.get("/api/insta/keywords/ranked?threshold=0.0&limit=10")
+    assert r.status_code == 200
+    items = r.json()["items"]
+    assert len(items) >= 1
+    assert "final_score" in items[0] and "eligible" in items[0]
+
+
+def test_decision_approve_publishes(client):
+    sid = db.add_card_slate({"keyword": "금리", "category": "economy"})
+    r = client.post(f"/api/insta/slates/{sid}/decision", json={"decision": "approved"})
+    assert r.status_code == 200
+    assert db.get_card_slate(sid)["status"] == "published"
+
+
+def test_decision_reject(client):
+    sid = db.add_card_slate({"keyword": "환율", "category": "economy"})
+    r = client.post(f"/api/insta/slates/{sid}/decision", json={"decision": "rejected"})
+    assert r.status_code == 200
+    assert db.get_card_slate(sid)["status"] == "rejected"
+
+
+def test_decision_invalid_400(client):
+    sid = db.add_card_slate({"keyword": "x", "category": "economy"})
+    r = client.post(f"/api/insta/slates/{sid}/decision", json={"decision": "maybe"})
+    assert r.status_code == 400