A collection of fixes for nightly

[aaronleopold]

Description

This PR is a mix of a few different bug fixes. Originally it only contained items I reviewed from snooping on a few heavily vibe-coded forks, that I figure would never be reported or otherwise flow back to here, but tacked on a few unrelated-to-that mobile app fixes here as well:

• Fix immediate drop of job scheduler
• Fix edge-case string filters with wildcards (e.g., searching for 50%)
• Scope author queries to user-visible books, not all books
• Add explicit Cache-Control: no-store response header for error responses
• Fix style regression for the checkmark in grid items (expo)
  • This code hasn't changed in ~4 months, so I think it was a regression from upgrading expo or nativewind
• Cast wider net for cache invalidation when mutating a book's progression (expo)

If any other small items crop up in the next day or so, I'll add them here and just rebase merge

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

[codecov]

Codecov Report

❌ Patch coverage is 87.23404% with 12 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/graphql/src/query/author.rs	0.00%	8 Missing ⚠️
apps/server/src/http_server.rs	0.00%	2 Missing ⚠️
core/src/lib.rs	0.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ
apps/server/src/errors.rs	22.90% <100.00%> (+0.59%)	⬆️
core/src/job/scheduler.rs	0.00% <ø> (ø)
crates/graphql/src/filter/keyword.rs	100.00% <100.00%> (ø)
crates/graphql/src/filter/mod.rs	75.86% <100.00%> (+29.26%)	⬆️
apps/server/src/http_server.rs	0.00% <0.00%> (ø)
core/src/lib.rs	23.23% <0.00%> (ø)
crates/graphql/src/query/author.rs	0.00% <0.00%> (ø)

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