feat(insta-lab): db migration — trending_keywords.source + account_preferences + CRUD

- Idempotent ALTER TABLE adds source column (default 'manual') + idx_tk_source index
- New account_preferences table seeded with economy/psychology/celebrity at weight=1.0
- add_trending_keyword now accepts optional source param
- New helpers: add_external_trend, list_trends, get_preferences, upsert_preferences
- test_db updated: six→seven tables; test_preferences_crud.py (7 new tests, all pass)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

insta-lab/tests/test_preferences_crud.py

@@ -0,0 +1,77 @@
+import os
+import gc
+import tempfile
+
+import pytest
+
+from app import db as db_module
+
+
+@pytest.fixture
+def tmp_db(monkeypatch):
+    fd, path = tempfile.mkstemp(suffix=".db")
+    os.close(fd)
+    monkeypatch.setattr(db_module, "DB_PATH", path)
+    db_module.init_db()
+    yield path
+    gc.collect()
+    for ext in ("", "-wal", "-shm"):
+        try:
+            os.remove(path + ext)
+        except OSError:
+            pass
+
+
+def test_init_db_creates_account_preferences(tmp_db):
+    with db_module._conn() as conn:
+        rows = conn.execute("SELECT name FROM sqlite_master WHERE type='table'").fetchall()
+    names = {r[0] for r in rows}
+    assert "account_preferences" in names
+
+
+def test_init_db_seeds_default_weights(tmp_db):
+    prefs = db_module.get_preferences()
+    cats = {p["category"]: p["weight"] for p in prefs}
+    assert cats["economy"] == pytest.approx(1.0)
+    assert cats["psychology"] == pytest.approx(1.0)
+    assert cats["celebrity"] == pytest.approx(1.0)
+
+
+def test_upsert_preferences_replaces_weights(tmp_db):
+    db_module.upsert_preferences({"economy": 0.6, "psychology": 0.3, "celebrity": 0.1, "tech": 0.5})
+    prefs = {p["category"]: p["weight"] for p in db_module.get_preferences()}
+    assert prefs["economy"] == pytest.approx(0.6)
+    assert prefs["tech"] == pytest.approx(0.5)
+    assert "celebrity" in prefs and prefs["celebrity"] == pytest.approx(0.1)
+
+
+def test_trending_keywords_source_column_exists(tmp_db):
+    with db_module._conn() as conn:
+        cols = [r[1] for r in conn.execute("PRAGMA table_info(trending_keywords)").fetchall()]
+    assert "source" in cols
+
+
+def test_add_trending_keyword_default_source(tmp_db):
+    kid = db_module.add_trending_keyword({
+        "keyword": "K", "category": "economy", "score": 0.5, "articles_count": 3,
+    })
+    with db_module._conn() as conn:
+        row = conn.execute("SELECT source FROM trending_keywords WHERE id=?", (kid,)).fetchone()
+    assert row[0] == "manual"
+
+
+def test_add_external_trend_stores_source(tmp_db):
+    tid = db_module.add_external_trend({
+        "keyword": "급등주", "category": "economy", "source": "naver_popular", "score": 0.9,
+    })
+    rows = db_module.list_trends(source="naver_popular")
+    assert any(r["id"] == tid and r["keyword"] == "급등주" for r in rows)
+
+
+def test_list_trends_filters_by_source_and_category(tmp_db):
+    db_module.add_external_trend({"keyword": "A", "category": "economy", "source": "naver_popular", "score": 1.0})
+    db_module.add_external_trend({"keyword": "B", "category": "celebrity", "source": "google_trends", "score": 1.0})
+    only_naver = db_module.list_trends(source="naver_popular")
+    assert {r["keyword"] for r in only_naver} == {"A"}
+    only_celeb_google = db_module.list_trends(source="google_trends", category="celebrity")
+    assert {r["keyword"] for r in only_celeb_google} == {"B"}