refactor: Proxy and cache avatar images (#907)

* refactor: proxy and cache user avatar images

* fix: extract keys

* fix: set avatar image URL

* fix: show the correct avatar in the list of available users in advanced request

* fix(s): set correct src URL for cached image

* fix: remove unexpired unused image when a user changes their avatar

* fix: requested changes

* refactor: use 'mime' package to detmerine file extension

* style: grammar

* refactor: checks if the default avatar is cached to avoid creating duplicates for different users

* fix: fix vulnerability

* fix: fix incomplete URL substring sanitization

* refactor: only cache avatar with http url protocol

* fix: remove log and correctly set the if statement for the cached image component

* fix: avatar images not showing on issues page

* style: formatting

---------

Co-authored-by: JoaquinOlivero <joaquin.olivero@hotmail.com>

src/components/Settings/SettingsJobsCache/index.tsx

@@ -82,6 +82,7 @@ const messages: { [messageName: string]: MessageDescriptor } = defineMessages(
       'When enabled in settings, Jellyseerr will proxy and cache images from pre-configured external sources. Cached images are saved into your config folder. You can find the files in <code>{appDataPath}/cache/images</code>.',
     imagecachecount: 'Images Cached',
     imagecachesize: 'Total Cache Size',
+    usersavatars: "Users' Avatars",
   }
 );
 
@@ -573,6 +574,19 @@ const SettingsJobs = () => {
                 {formatBytes(cacheData?.imageCache.tmdb.size ?? 0)}
               </Table.TD>
             </tr>
+            <tr>
+              <Table.TD>
+                {intl.formatMessage(messages.usersavatars)} (avatar)
+              </Table.TD>
+              <Table.TD>
+                {intl.formatNumber(
+                  cacheData?.imageCache.avatar.imageCount ?? 0
+                )}
+              </Table.TD>
+              <Table.TD>
+                {formatBytes(cacheData?.imageCache.avatar.size ?? 0)}
+              </Table.TD>
+            </tr>
           </Table.TBody>
         </Table>
       </div>