fix(eslint): add missing useCallback deps, remove stale disable directives

- useMessageSearch: add fromTs/toTs to useCallback dep array (exhaustive-deps error)
- useMessageSearch: restore eslint-disable on the correct line for the `as any` cast
- VoiceMessageRecorder: remove two eslint-disable directives for rules that are
  globally off (jsx-a11y/media-has-caption) or not enabled (react/no-array-index-key)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/components/VoiceMessageRecorder.tsx

@@ -228,7 +228,6 @@ export function VoiceMessageRecorder({ onSend, onError }: VoiceRecorderProps) {
         >
           {waveformBars.map((h, i) => (
             <div
-              // eslint-disable-next-line react/no-array-index-key
               key={i}
               style={{
                 width: toRem(2),
@@ -276,7 +275,6 @@ export function VoiceMessageRecorder({ onSend, onError }: VoiceRecorderProps) {
       }}
     >
       {previewUrl && (
-        // eslint-disable-next-line jsx-a11y/media-has-caption
         <audio src={previewUrl} controls style={{ height: toRem(28), maxWidth: toRem(180) }} />
       )}
       <Text size="T200" style={{ fontVariantNumeric: 'tabular-nums', flexShrink: 0 }}>