Bump thiserror from 2.0.20 to 2.0.21 in /src-tauri

[dependabot]

Bumps thiserror from 2.0.20 to 2.0.21.

Release notes

Sourced from thiserror's releases.

2.0.21

• Fix parsing of generic unit variants in display expressions (#459)

Commits

• b1827ee Release 2.0.21
• 58037b5 Merge pull request #459 from dtolnay/turbofish
• f82a0cf Keep track of nested turbofish depth
• 72ea492 Raise required compiler to Rust 1.77
• 72eea0d Resolve io_other_error clippy lint in tests
• 07f09a2 Raise required compiler to Rust 1.74
• 2715388 Update ui test suite to nightly-2026-09-22
• 5a306c7 Update ui test suite to nightly-2026-09-05
• ef9383b Update ui test suite to nightly-2026-08-22
• 8336b84 Update ui tests for version 2.0.20
• See full diff in compare view

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[lamemustafa]

Independent review (local, Sonnet) of 9962ae3

Scope: the whole diff against base 3e2c2cc, which is src-tauri/Cargo.lock only (thiserror and thiserror-impl 2.0.20 → 2.0.21).

Verdict: P2: it cannot merge as pushed. It changes a pinned file without a reseal and leaves the Rust license inventory stale. CI fails on both, so neither failure is silent.

P2-1: src-tauri/Cargo.lock is pinned, and the surface still holds the base's hash.

• The pin is ac2dd868…, the base's hash; the head's bytes hash to 69d494b3….
• "Tally portable core" fails at tests::real_tree_has_complete_migration_and_report_surface_coverage (bridge-tally-compatibility/src/lib_tests.rs:936) with surface_file_changed.
• Fix: scripts/reseal.sh on the branch, in a slot.

P2-2: THIRD_PARTY_LICENSES_RUST.txt still lists thiserror 2.0.20.

• "Rust format" fails at the inventory step with Rust third-party inventory drift (missing: thiserror 2.0.21, thiserror-impl 2.0.21; …).
• Fix: regenerate with scripts/generate-rust-licenses.mjs.
• The same drift message also lists as stale about twenty crates unrelated to this bump (base64 0.21.7, proptest 1.11.0, rand 0.9.5, …). I have not established why. It may mean the committed inventory is already behind master, which the regeneration would show.

The upgrade itself: no impact found.

• 2.0.21 fixes parsing of generic unit variants in #[error(...)] display expressions (Keep track of nested turbofish depth dtolnay/thiserror#459).
• A search of the tree finds no #[error(...)] with turbofish or generic-variant syntax.
• The diff touches no source file.

Noted, not introduced here: tools/Cargo.lock pins thiserror 2.0.19, and the inventory checker covers src-tauri only.

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Generated by Claude Code

[lamemustafa]

Superseded by #805, which carries this bump together with the other Dependabot updates, the regenerated notices and one compatibility reseal.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.