Implemented negative filters in back-end, added basic fixed filters settings dialog.

pages/users/@username/+Page.vue

@@ -20,6 +20,7 @@
 					<h3 class="heading">Stashes</h3>
 
 					<button
+						v-if="profile.id === user?.id"
 						class="button"
 						@click="showStashDialog = true"
 					>
@@ -79,6 +80,7 @@ import StashTile from '#/components/stashes/tile.vue';
 import Dialog from '#/components/dialog/dialog.vue';
 
 const pageContext = inject('pageContext');
+const user = pageContext.user;
 const profile = ref(pageContext.pageProps.profile);
 
 const stashName = ref(null);