frontend: clear the 99 lint errors

`npm run lint` reported 99 errors and 26 warnings across 65 files and
had presumably been failing for a while — next.config.ts sets
eslint.ignoreDuringBuilds, so the build never surfaced it.

68 were in vendored code: components/charts and components/ai-elements,
pulled from upstream registries. Re-linting those reports upstream's
style back at us, and "fixing" them means diverging and eating conflicts
on every update — ai-elements already has exactly this carve-out on the
TypeScript side via ignoreBuildErrors. Ignore both, plus the two registry
files in components/ui (carousel publishes its api from an effect; the
sidebar skeleton picks a random width).

The other 31 were ours, nearly all react-hooks/set-state-in-effect on
the same shape: an effect that re-seeds form state when a dialog opens or
a selection changes. Moved to render-phase adjustment, which is both what
React recommends and a real fix — the effect version paints one frame of
the *previous* record's values before correcting itself. Two carried
sharper bugs: the employee dialog could keep a typed password across a
switch to another member, and use-wallet-sync could carry `linked` over
to a newly-selected patient, briefly offering to push a record to
someone else's wallet.

The rest: useIsMobile and speech-support detection become
useSyncExternalStore (correct on first paint, no mount flash); refs
mirroring state are written in effects rather than during render; the
care-team fetch moves into its effect behind a reload key, dropping an
exhaustive-deps suppression.

Two effects in chat-panel keep the rule disabled with a reason. Both are
what effects are for: draining the queued-message buffer when the
transport goes idle, and resolving ?thread from the URL — the latter
mints an id with nanoid(), so moving it into render would just trade this
error for a purity one.

Also removes a dead /explore-era import and unused directives found on
the way. lint now exits 0, with the ai-elements tsc carve-out unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/components/graph/record-graph.tsx

@@ -75,7 +75,7 @@ const dotClass: Record<Kind, string> = {
 // A round node with the label below it and hidden connection handles so edges
 // meet the dot's centre cleanly. Memoized; it re-renders only when the hovered
 // id changes (via context), never via React Flow re-measuring.
-const RecordNode = memo(function RecordNode({ id, data }: NodeProps) {
+const RecordNode = memo(function RecordNode({ data }: NodeProps) {
   const { label, sub, kind, family } = data as RecordNodeData;
   const hovered = useContext(HoverContext);
   const focus: "active" | "dim" | null =