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/api/subsonicArtists.ts

@@ -15,7 +15,8 @@ import type {
 } from './subsonicTypes';
 
 export async function getArtists(): Promise<SubsonicArtist[]> {
-  const data = await api<{ artists: { index: any } }>('getArtists.view', {
+  type ArtistIndexEntry = { artist?: SubsonicArtist | SubsonicArtist[] };
+  const data = await api<{ artists?: { index?: ArtistIndexEntry | ArtistIndexEntry[] } }>('getArtists.view', {
     ...libraryFilterParams(),
   });
   const rawIdx = data.artists?.index;

src/api/subsonicLibrary.ts

@@ -136,11 +136,6 @@ async function albumIdsInLibraryScope(serverId: string): Promise<Set<string> | n
   return ids;
 }
 
-async function albumIdsInActiveLibraryScope(): Promise<Set<string> | null> {
-  const { activeServerId } = useAuthStore.getState();
-  return activeServerId ? albumIdsInLibraryScope(activeServerId) : null;
-}
-
 export async function filterSongsToServerLibrary(
   songs: SubsonicSong[],
   serverId: string,

src/api/subsonicStreamUrl.ts

@@ -1,5 +1,5 @@
 import md5 from 'md5';
-import { coverStorageKey, coverStorageKeyFromRef } from '../cover/storageKeys';
+import { coverStorageKeyFromRef } from '../cover/storageKeys';
 import { coverEntryToRef, resolveAlbumCoverEntry } from '../cover/resolveEntry';
 import type { CoverArtTier } from '../cover/types';
 import { useAuthStore } from '../store/authStore';