✨ Add home page section preferences

[devy1540]

Description

Home page sections currently have a fixed order and cannot be hidden. This adds an editor under Preferences → Home page to show or hide the four existing sections, reorder them by dragging or keyboard, and save the layout per user. Reset restores the default order and visibility. When every section is hidden, the home page provides a link back to preferences.

This implements the home-section portion of #245.

• Match the navigation arrangement editor's styling, with eye-icon visibility controls and small Reset, Cancel, and Save buttons in the header. Save keeps its label while pending; failures use a short toast title and the error message as its description.
• Add updateHomeArrangement and apply the same normalization when reading saved home sections: keep the first supported occurrence of each section, preserve its order and visibility, and append missing sections as hidden.
• Use ordinary tagged Serde serialization. Unreadable arrangement JSON falls back to the corresponding default configuration; the next save writes the current format. Decoding happens at the arrangement-field boundary so a bad configuration does not prevent loading the user's preferences.
• Remove unused links fields from the built-in home section configurations.
• Render and prefetch enabled sections in the saved order. Successful saves update the query cache and cancel older in-flight reads; failed saves retain the draft for retry.

The shared server API can support a future mobile implementation. This PR adds the web editor and updates its documentation.

LLM tooling assisted with this contribution.

Validation

• Browser tests: 274 passed, including keyboard ordering, visibility, reset and invalid-configuration recovery, save failure/retry, rendering, prefetching, and stale-read handling.
• Model tests: 78 passed, including tagged JSON round trips and section normalization.
• Server integration tests: 60 passed. Home-specific cases cover saved order/visibility, normalization on reads and writes, and unreadable-config fallback followed by a successful save.
• Browser TypeScript checks, production web build, Rust formatting, Clippy for models and graphql, GraphQL schema consistency, and client generation passed.
• Browser ESLint: 0 errors; 17 warnings remain in existing files outside this change.
• Revalidated in Chrome using a temporary local database and empty library: keyboard reordering, visibility, cancellation, saving and reload, all-hidden recovery, and Reset. Stopping the test server confirmed the error toast and draft retention; restarting it allowed the same draft to be saved.
• Rechecked after merging nightly: aligned the home test with react-router and added explicit hook return types to fix declaration generation.

Ready?

• I read the contributing guidelines
• I searched for existing issues or pull requests that may be related to my contribution
• This PR targets nightly and not main
• I added tests and documentation for my changes
• I disclosed the use of LLMs in this PR

Stump Contributor License Agreement

By contributing to Stump, you agree that your contributions will be licensed under the following licenses (where applicable):

• The expo application is licensed under GPL-3.0
• All other code in the repository is licensed under MIT License

[aaronleopold]

Thank you for working on this, I reviewed the changes this morning and have some feedback

[codecov]

Codecov Report

❌ Patch coverage is 91.06145% with 16 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/models/src/shared/arrangement.rs	90.41%	14 Missing ⚠️
crates/graphql/src/input/user.rs	0.00%	1 Missing ⚠️
crates/models/src/entity/user.rs	0.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
crates/graphql/src/mutation/user.rs	14.58% <100.00%> (+14.58%)	⬆️
crates/graphql/src/object/user_preferences.rs	75.00% <ø> (+75.00%)	⬆️
crates/models/src/entity/user_preferences.rs	50.00% <100.00%> (+31.81%)	⬆️
crates/graphql/src/input/user.rs	0.00% <0.00%> (ø)
crates/models/src/entity/user.rs	45.16% <0.00%> (+0.48%)	⬆️
crates/models/src/shared/arrangement.rs	90.95% <90.41%> (+87.00%)	⬆️

... and 2 files with indirect coverage changes

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[devy1540]

Thanks for the detailed review, @aaronleopold! I've pushed updates addressing your feedback and merged the latest nightly changes. Whenever you have a chance, I'd appreciate another look. Happy to make any further adjustments!

[aaronleopold]

Thanks for making those updates! I have one remaining point, but otherwise I think this looks good

[aaronleopold]

Thank you