feat(agent-office): /activity 통합 피드에 필터 추가 (agent_id/type/status/days)

오버사이트 UI용. get_activity_feed가 브랜치별 WHERE로 필터, total도 동일 반영. status는 task 전용(주면 log 제외). 값은 ? 바인딩, type은 브랜치 선택만이라 injection 안전. 신규 5 테스트.

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

agent-office/app/db.py

@@ -534,33 +534,58 @@ def get_conversation_stats(days: int = 7) -> Dict[str, Any]:
     }
 
 
-def get_activity_feed(limit: int = 50, offset: int = 0) -> dict:
-    with _conn() as conn:
-        total_row = conn.execute("""
-            SELECT (SELECT COUNT(*) FROM agent_tasks) + (SELECT COUNT(*) FROM agent_logs) AS total
-        """).fetchone()
-        total = total_row["total"] if total_row else 0
+def get_activity_feed(limit: int = 50, offset: int = 0, agent_id: str = None,
+                      type: str = None, status: str = None, days: int = None) -> dict:
+    # 브랜치별 WHERE (값은 ? 바인딩, type은 브랜치 선택용). status는 task 전용 → 주면 log 제외.
+    task_where, task_params = [], []
+    log_where, log_params = [], []
+    if agent_id:
+        task_where.append("agent_id=?"); task_params.append(agent_id)
+        log_where.append("agent_id=?"); log_params.append(agent_id)
+    if status:
+        task_where.append("status=?"); task_params.append(status)
+    if days and days > 0:
+        task_where.append("created_at >= datetime('now', ?)"); task_params.append(f"-{int(days)} days")
+        log_where.append("created_at >= datetime('now', ?)"); log_params.append(f"-{int(days)} days")
+    include_tasks = type in (None, "task")
+    include_logs = type in (None, "log") and not status
 
-        rows = conn.execute("""
+    task_clause = (" WHERE " + " AND ".join(task_where)) if task_where else ""
+    log_clause = (" WHERE " + " AND ".join(log_where)) if log_where else ""
+
+    branches, branch_params = [], []
+    if include_tasks:
+        branches.append(f"""
             SELECT 'task' AS type, agent_id, id AS task_id, task_type,
                    status, NULL AS level,
-                   COALESCE(
-                       json_extract(result_data, '$.summary'),
-                       task_type
-                   ) AS message,
-                   created_at, completed_at,
-                   result_data
-            FROM agent_tasks
-            UNION ALL
+                   COALESCE(json_extract(result_data, '$.summary'), task_type) AS message,
+                   created_at, completed_at, result_data
+            FROM agent_tasks{task_clause}""")
+        branch_params += task_params
+    if include_logs:
+        branches.append(f"""
             SELECT 'log' AS type, agent_id, task_id, NULL AS task_type,
-                   NULL AS status, level,
-                   message,
-                   created_at, NULL AS completed_at,
-                   NULL AS result_data
-            FROM agent_logs
-            ORDER BY created_at DESC
-            LIMIT ? OFFSET ?
-        """, (limit, offset)).fetchall()
+                   NULL AS status, level, message,
+                   created_at, NULL AS completed_at, NULL AS result_data
+            FROM agent_logs{log_clause}""")
+        branch_params += log_params
+
+    if not branches:
+        return {"items": [], "total": 0}
+
+    union_sql = " UNION ALL ".join(branches) + " ORDER BY created_at DESC LIMIT ? OFFSET ?"
+
+    with _conn() as conn:
+        total = 0
+        if include_tasks:
+            total += conn.execute(
+                f"SELECT COUNT(*) AS c FROM agent_tasks{task_clause}", task_params
+            ).fetchone()["c"]
+        if include_logs:
+            total += conn.execute(
+                f"SELECT COUNT(*) AS c FROM agent_logs{log_clause}", log_params
+            ).fetchone()["c"]
+        rows = conn.execute(union_sql, branch_params + [limit, offset]).fetchall()
 
     items = []
     for r in rows: