feat(iserv): /api/notes/iserv/tasks and /file for the notes app

feat(iserv): overview and file download for the notes app

feat(iserv): expired flag, attachment links and due text parser

fix: ?dateien=1 filter time (single NER pass, 420 s timeout, clearer errors)

style: release page with cards, dark mode, select-all

feat: release page lists asked files, multi-select, code remembered on the device

feat: /iserv/freigabe releases unchecked files (APPROVE_TOKEN, 10 min, once)

feat: /iserv/tasks?dateien=1 passes original files without names

feat(iserv): shorter output, finished tasks only with ?alle=1

feat(iserv): filtered IServ tasks for Muse

Update independent app to newest state with LFS and binary removals