feat: improve llm

[alperozturk96]

• Tests written, or not not needed

Changes

Task list caching: Task lists are now cached by account name to improve load times.
Background polling: Replaces the visible “blocked” loading state with a background polling mechanism to provide a smoother user experience.
UI layout update: Migrates from Box to Scaffold, allowing UI elements such as Snackbars and FABs to behave more naturally.
Replacing Deprecated API: Replaces deprecated ScrollableTabRow with PrimaryScrollableTabRow.
Empty state improvements: Introduces consistent empty state visuals, aligned with the design used in ExtendedListFragment.
LLM output indicator: Adds a visual marker to identify LLM-generated task outputs.

Out-of Scope

1. Task type names and order currently cannot be matched precisely, as the web app still uses hardcoded names.
   Once those fields are exposed via the API, this logic will be aligned on the client side. @julien-nc

e.g:

2. Task list screen and task detail bottom sheet redesigns are not included in this PR. These will be handled in a separate design update PR.

Design Feedback Needed

@kra-mo

1. When the assistant app is enabled but not yet configured, the user cannot access task types or create new tasks.
   In this state, the following screen is displayed:

2. Visual indicator for LLM-generated task outputs:

Demo

Screen.Recording.2025-11-04.at.11.16.41.mp4

[github-actions]

Codacy

SpotBugs

Category	Base	New
Bad practice	42	42
Correctness	73	73
Dodgy code	272	272
Experimental	1	1
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	35	35
Performance	48	48
Security	18	18
Total	498	498

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/15897.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.

[github-actions]

blue-Light-Screenshot test failed, but no output was generated. Maybe a preliminary stage failed.