Preloading audio for Edge TTS and other fixes (#138)

* Blacklist some low-quality web tts voices

* Dropdown layout tweaks

* Handle no audio data received in Edge TTS

* Preloading audio for Edge TTS

apps/readest-app/src/app/reader/components/settings/FontDropDown.tsx

@@ -62,7 +62,7 @@ const FontDropdown: React.FC<DropdownProps> = ({
             >
               {moreOptions.map((option) => (
                 <li key={option} onClick={() => onSelect(option)}>
-                  <div className='flex items-center px-0'>
+                  <div className='flex items-center px-2'>
                     <span style={{ minWidth: '20px' }}>
                       {selected === option && <MdCheck size={20} className='text-base-content' />}
                     </span>