remove time graph visualiser. More tests. Other fixes

bouquin/db.py

@@ -790,49 +790,6 @@ class DBManager:
             revisions_by_date,
         )
 
-    def get_tag_cooccurrences(self):
-        """
-        Compute tag–tag co-occurrence across pages.
-
-        Returns:
-            tags_by_id: dict[int, TagRow]   # id -> (id, name, color)
-            edges: list[(int, int, int)]    # (tag_id1, tag_id2, page_count)
-            tag_page_counts: dict[int, int] # tag_id -> number of pages it appears on
-        """
-        cur = self.conn.cursor()
-
-        # 1) All tags (reuse existing helper)
-        all_tags: list[TagRow] = self.list_tags()
-        tags_by_id: dict[int, TagRow] = {t[0]: t for t in all_tags}
-
-        # 2) How many pages each tag appears on (for node sizing)
-        rows = cur.execute(
-            """
-            SELECT tag_id, COUNT(DISTINCT page_date) AS c
-            FROM page_tags
-            GROUP BY tag_id;
-            """
-        ).fetchall()
-        tag_page_counts = {r["tag_id"]: r["c"] for r in rows}
-
-        # 3) Co-occurrence of tag pairs on the same page
-        rows = cur.execute(
-            """
-            SELECT
-                pt1.tag_id AS tag1,
-                pt2.tag_id AS tag2,
-                COUNT(DISTINCT pt1.page_date) AS c
-            FROM page_tags AS pt1
-            JOIN page_tags AS pt2
-              ON pt1.page_date = pt2.page_date
-             AND pt1.tag_id < pt2.tag_id
-            GROUP BY pt1.tag_id, pt2.tag_id;
-            """,
-        ).fetchall()
-
-        edges = [(r["tag1"], r["tag2"], r["c"]) for r in rows]
-        return tags_by_id, edges, tag_page_counts
-
     # -------- Time logging: projects & activities ---------------------
 
     def list_projects(self) -> list[ProjectRow]:
@@ -1037,7 +994,7 @@ class DBManager:
               AND t.page_date BETWEEN ? AND ?
             GROUP BY bucket, activity_name
             ORDER BY bucket, LOWER(activity_name);
-            """,  # nosec B608: bucket_expr comes from a fixed internal list
+            """,  # nosec
             (project_id, start_date_iso, end_date_iso),
         ).fetchall()