feat(wallet): transaction table model/key columns + token four-column breakdown (rants 2026-08-22T06:36:54/06:37:50/06:39:04)

[argszero]

Summary

Transaction history table column fixes (host dev-tested on atp-dev):

1. Model / Key column showed counterpart user_id (1/2) — now split into two readable columns:
   • Model column: model name (e.g. deepseek-v4-flash); topup/gift/raise rows show the transaction type label instead
   • Key column: key_label from the keys table (note → provider / plan → provider; deleted/missing key → —)
2. Token usage now four flat columns (instead of one column + sub-line):
   • Input (non-cache) / Input (cache) / Output / Total — same figures the summary bar uses (input = total − cached − output)

Related Rants

• 2026-08-22T06:36:54 — 「模型 / Key」列显示对端 user_id 错误
• 2026-08-22T06:37:50 — 拆成模型列 + Key 列两列显示
• 2026-08-22T06:39:04 — Token 用量拆成四列（输入非缓存 / 输入缓存 / 输出 / 总）

Changes

• src/routes/wallet.rs: transactions query LEFT JOINs keys → new key_label field per row (note first, else provider / plan, else provider; null when no key); added transactions_key_label test covering note / provider-plan / null paths
• ui/js/app.js: TX_COLUMNS partner column → model + key; tokens column → input / cached / output / tokens; txsToView builds the new view fields; CSV export updated to the 10 new columns
• ui/js/i18n.js: zh/en — tx.col.model, tx.col.key, tx.col.input, tx.col.cached, tx.col.output, tx.col.tokens ("总 Token"/"Total")
• ui/index.html: cache-bust bumped to 20260822-1

Tests

• cargo test: 139/139 passed (new transactions_key_label + all existing)
• cargo clippy: clean (-D warnings)
• cargo fmt --check: clean
• node --check ui/js/app.js + ui/js/i18n.js: OK

Acceptance

• Each row shows model name + key label (no more 1/2 counterpart ids)
• consume/earn rows show the model; topup/gift rows show the type label
• Four token columns render correctly; legacy rows (cached/output = 0) show input = total
• Summary bar token stats consistent with the four columns