useSimStore is the one reactive module singleton from the spec: panels
over a shared base config, runs debounced 400 ms, one POST /api/scenario
per panel in parallel, results swapped in atomically only when every
request succeeds. Failures keep the last good results; engine 400s are
routed to an inline validationError, everything else to the banner
message. Stale in-flight responses lose to newer runs per panel.
URL state follows spec section 7 (readable params, repeated panel=,
focus index, full fallback to the preset on any malformed part) and is
covered by round-trip and rejection tests. The study copy and initial
panels live in the deepfake-school preset module; formatPct is the
single percent-rounding rule.
The vitest tsconfig now keeps lib at ES2022 like the app config, and
prettier skips the tygo-generated src/types (drift guard stays green).
Verbatim output of 'npm create vue@latest web -- --ts --vitest
--eslint --prettier' so this commit shows exactly what the official
scaffold generates; our own changes come separately. Lean per the
agreed choices: no Router/Pinia until a second page or shared state
exists. node_modules is ignored via the scaffold's own web/.gitignore.
