feat: add button to create a new study

[tom-anders]

create-study.webm

based on #3532

[Copilot]

Pull request overview

Adds end-to-end UI to create a new Study from the Study list (and to add a chapter from within a study), wiring it to the Study API and extending widget tests/helpers to cover the new flows.

Changes:

• Add a “Create study” FAB on the Study list that opens a new Create Study bottom sheet and navigates to the created study.
• Introduce new bottom sheets for creating a study (settings) and creating a study chapter (empty/FEN/PGN), backed by new payload types + repository methods.
• Expand widget test coverage and add shared test utilities for opening bottom sheets and mocking clipboard content.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/view/study/create_study_chapter_bottom_sheet_test.dart	New widget tests covering chapter creation flows (empty/FEN/PGN, new/existing study).
test/view/study/create_study_bottom_sheet_test.dart	New widget test verifying Create Study defaults and transition to chapter creation.
test/view/play/create_challenge_bottom_sheet_test.dart	Refactor tests to use shared bottom-sheet opener helper.
test/view/more/import_pgn_screen_test.dart	Switch to shared clipboard mocking helper.
test/test_helpers.dart	Add shared mockClipboard helper for widget tests.
test/test_bottom_sheet_opener.dart	New shared TestBottomSheetOpener widget + open helper to reduce test boilerplate.
lib/src/view/study/study_list_screen.dart	Add FAB entry point to create a new study via bottom sheet.
lib/src/view/study/study_bottom_bar.dart	Add “New chapter” action that opens the chapter-creation bottom sheet.
lib/src/view/study/create_study_chapter_bottom_sheet.dart	New UI for creating chapters from empty/FEN/PGN + file import, calling repository APIs.
lib/src/view/study/create_study_bottom_sheet.dart	New UI for choosing study settings before creating the first chapter.
lib/src/model/study/study.dart	Add payload types + enums to support study/chapter creation parameters.
lib/src/model/study/study_repository.dart	Add API methods to create chapters, delete chapters, and create a study + replace initial empty chapter.

Suppressed comments (2)

test/view/study/create_study_bottom_sheet_test.dart:66

• _TestBottomSheetOpener is unused (the test uses TestBottomSheetOpener). Remove this dead code to keep the test file focused and avoid unused-element noise.

This issue also appears on line 82 of the same file.
test/view/study/create_study_bottom_sheet_test.dart:86

• Remove the remaining unused _TestBottomSheetOpener widget block.

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[ijm8710]

On web, the create study plus sign button is visible even on the main studies page.

I'd propose that we show "create study" always (within the studies section) so that it's more discoverable.

Thoughts?

[tom-anders]

hmm not sure why the formatting check fails, locally dart format says the file is formatted correctly. Might be a version mismatch? I'm already on flutter SDK 3.47.1 locally

[tom-anders]

On web, the create study plus sign button is visible even on the main studies page.

I'd propose that we show "create study" always (within the studies section) so that it's more discoverable.

Thoughts?

Good suggestion I think, added it:

studyButton.webm

[tom-anders]

@veloce Finally got around to fixing the formatting issues, sorry about that. It's ready for review now :)

[veloce]

@tom-anders sorry, now there are conflicts with the new lints, can you solve them please? thanks

[tom-anders]

@veloce fixed 👍

[veloce]

Looks good! only a small comment.

[veloce]

I'd put the floating button only in the study list screen. Because the learn screen is not just about studies.