translate nine user-facing english values (step3/step4/step5 waiting
states, step5 interactive tools and report-agent chat panel, graph
panel labels) plus the user-visible step 2 log line `log.prepareTaskId`
to natural chinese, so chinese-locale users no longer see english text
mixed into the chinese ui.
`home.heroDescBrand` is intentionally left as the literal `MiroFish`
because it is a brand name. `log.prepareTaskId` was translated rather
than kept english because it is rendered into the in-ui log panel via
`Step2EnvSetup.vue:801` and every surrounding `log.*` value in zh.json
is already translated; the leading two-space indent, the `└─`
continuation glyph, and the `{taskId}` placeholder are preserved.
en.json and zh.json key sets remain identical
(`paths(scalars)` diff is empty); no frontend code is changed.
Closes#8
0a65edfa46