[JetSquirrel]

Fixes budget editing, account state badges and untranslated text on Accounts and Rules. There is no linked issue.

What changed

Budgets and rules

• Editing a budget no longer resets its alert threshold to 80%. BudgetStatus now carries the saved threshold, on both the desktop and web backends, and only an account with no budget gets the default.
• The rule form shows the chosen account's budget, or warns that the rule won't fire until the account has one.

Account state badges

• Anomaly and untagged spend badges matched by provider, so one account's problem marked every account from that provider. Both now read the account.
• An anomaly from a rule that watches a whole provider names no account, so it still matches at provider level and marks all of that provider's accounts.
• An anomaly or low balance badge is now a link to Alerts, by mouse or keyboard.

Text and accessibility

• Remaining English strings on Accounts and Rules move to locales/ui.yml, with en and zh-CN.
• Account links can be reached by keyboard. Row actions and rule switches name their target for assistive technology.
• The Accounts subtitle now explains that month figures are net of credits and can be negative.

This branch also merges current main, so it has no conflicts with it.

Testing

Run locally on Windows on the merged code, before a final commit that only moved two doc comments and added the changelog:

• cargo test: 600 passed, 0 failed, 3 ignored. This includes a new test that untagged totals split by account.
• cargo clippy --all-targets -- -D warnings: clean.
• cargo +nightly-2026-07-28 check --lib --target wasm32-unknown-unknown: passes. This is a type-check, not the full build-web.sh.

cargo fmt --check passes on the final commit.

Not tested in a real window, and the threshold fix has no test of its own. Please check on desktop:

• Edit a budget saved with a non-default threshold, change only the amount and save. The threshold stays.
• With an anomaly or untagged spend on one account, its sibling from the same provider stays unmarked.
• An anomaly or low balance badge opens Alerts by click, and by Tab then Enter or Space.
• The longer Accounts subtitle fits at minimum window width and in 简体中文.

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