feat(frontend): feed of deleted and edited messages above the chat list and per chat in the changes panel

frontend/src/routes/app/[chatId]/+page.svelte

@@ -1,11 +1,16 @@
 <script lang="ts">
+  import { untrack } from "svelte";
   import ChatHeader from "#lib/components/ChatHeader.svelte";
   import MessageList from "#lib/components/MessageList.svelte";
   import { accounts } from "#lib/stores/accounts.svelte.js";
   import { chats } from "#lib/stores/chats.svelte.js";
+  import { withoutMessage } from "#lib/stores/feed.svelte.js";
+  import { ui } from "#lib/stores/ui.svelte.js";
+  import { goto } from "$app/navigation";
   import { page } from "$app/state";
 
   const chatId = $derived(Number(page.params.chatId));
+  const linkedMessage = $derived(page.url.searchParams.get("message"));
 
   $effect(() => {
     if (accounts.selectedId === null) {
@@ -14,6 +19,19 @@
     chats.ensure(chatId);
     chats.enrich(chatId);
   });
+
+  $effect(() => {
+    if (linkedMessage === null) {
+      return;
+    }
+    const messageId = Number(linkedMessage);
+    untrack(() => {
+      if (Number.isSafeInteger(messageId)) {
+        ui.requestJump(chatId, messageId);
+      }
+      goto(withoutMessage(page.url), { replace: true, reset: false });
+    });
+  });
 </script>
 
 <div class="chat-view">