fix: resolve all ESLint errors (lint now exits 0)

- useAppKeyboard: move all logic inside useEffect, fixes refs-in-render
  and no-unused-expressions for view mode shortcut handler
- SettingsPanel: refactor to inner component to fix setState-in-effect;
  remove unused maskKey function
- NoteList: remove re-exports (consumers import from noteListHelpers directly);
  fix no-unused-expressions in toggleGroup; eslint-disable for Icon-in-render
- useNoteActions: eslint-disable tabsRef.current assignment (valid pattern)
- Test files: fix no-explicit-any in useKeyboardNavigation, useSettings,
  useVaultLoader, wikilinks tests; update NoteList.test import path

src/hooks/useKeyboardNavigation.test.ts

@@ -65,11 +65,11 @@ describe('useKeyboardNavigation', () => {
     // Track added listeners for cleanup verification
     const origAdd = window.addEventListener
     const origRemove = window.removeEventListener
-    vi.spyOn(window, 'addEventListener').mockImplementation((type: string, handler: EventListenerOrEventListenerObject, opts?: any) => {
+    vi.spyOn(window, 'addEventListener').mockImplementation((type: string, handler: EventListenerOrEventListenerObject, opts?: boolean | AddEventListenerOptions) => {
       addedListeners.push({ type, handler })
       origAdd.call(window, type, handler, opts)
     })
-    vi.spyOn(window, 'removeEventListener').mockImplementation((type: string, handler: EventListenerOrEventListenerObject, opts?: any) => {
+    vi.spyOn(window, 'removeEventListener').mockImplementation((type: string, handler: EventListenerOrEventListenerObject, opts?: boolean | EventListenerOptions) => {
       origRemove.call(window, type, handler, opts)
     })
   })