fix(phase26): add Pi trip deletion (BUG-08)

modules/app_sql.py

@@ -540,6 +540,17 @@ def get_trip_route(trip_id, max_points=2000):
     }
 
 
+def delete_trip(trip_id):
+    """Delete a computed trip record. Raw tracking rows are NOT removed."""
+    conn = get_conn()
+    if conn is None:
+        return False
+    with _conn_lock:
+        cur = conn.execute("DELETE FROM trips WHERE id = ?", (trip_id,))
+        conn.commit()
+        return cur.rowcount > 0
+
+
 def get_setting(key, default=None):
     """Read a persisted UI/app setting (e.g. the dashcam-upload toggle)."""
     conn = get_conn()