chore(eslint): add ESLint toolchain and clean src to strict 0/0 (#1165)

* chore(eslint): add eslint toolchain and configs

* fix(eslint): resolve gradual-config errors (rules-of-hooks, no-empty, prefer-const, …)

* chore(eslint): clear unused vars in config, contexts, app and test

* chore(eslint): clear unused vars in api and music-network

* chore(eslint): clear unused vars in utils

* chore(eslint): clear unused vars in store

* chore(eslint): clear unused vars in cover and hooks

* chore(eslint): clear unused vars in components

* chore(eslint): clear unused vars in pages

* chore(eslint): remove explicit any in src

* chore(eslint): align react-hooks exhaustive-deps

* chore(eslint): zero gradual config on src

* chore(eslint): strict hook rules in store and utils

* chore(eslint): strict hook rules in hooks and cover

* chore(eslint): strict hook rules in components

* chore(eslint): strict hook rules in pages and contexts

* chore(eslint): document scripts ignore in eslint config

* chore(eslint): add lint script and zero strict findings

* chore(eslint): address review round 1 (gradual 0/0, per-site disable reasons)

* chore(eslint): tighten two set-state disable comments (review round 2 LOW)

* chore(nix): sync npmDepsHash with package-lock.json

* docs(changelog): add Under the Hood entry for ESLint setup (PR #1165)

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

src/components/BecauseYouLikeRail.tsx

@@ -214,6 +214,8 @@ function useBecauseRowSlotCount(active: boolean, max = SHOW_COUNT): number {
 
   useEffect(() => {
     if (!active) {
+      // React Compiler set-state-in-effect rule: state set from a timer/animation callback.
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setCount(1);
       return;
     }
@@ -370,6 +372,8 @@ export default function BecauseYouLikeRail({
    *  while-revalidate), only clearing to skeleton when nothing is available. */
   useLayoutEffect(() => {
     if (hasValidReserve(activeServerId, musicLibraryFilterVersion)) {
+      // React Compiler set-state-in-effect rule: local state synced with store/prop inputs when the effect’s dependencies change.
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setAnchor(_becauseReserve!.anchor);
       setRecs(_becauseReserve!.recs);
       setRefreshing(false);
@@ -413,6 +417,8 @@ export default function BecauseYouLikeRail({
       return;
     }
     if (!activeServerId) {
+      // React Compiler set-state-in-effect rule: local state synced with store/prop inputs when the effect’s dependencies change.
+      // eslint-disable-next-line react-hooks/set-state-in-effect
       setAnchor(null);
       setRecs([]);
       setRefreshing(false);