fix(frontend): a link to a message opens the chat right at it without loading the latest page first

frontend/src/lib/components/MessageList.svelte

@@ -179,7 +179,7 @@
     return messages.find((m) => holds(m, messageId))?.message_id ?? null;
   }
 
-  function jumpToMessage(messageId: number) {
+  function jumpToMessage(messageId: number, smooth = true) {
     const owner = ownerOf(messageId) ?? messageId;
     const target = container?.querySelector<HTMLElement>(
       `[data-message-id="${owner}"]`
@@ -188,7 +188,10 @@
       toasts.error(t("thread.notFound"));
       return;
     }
-    target.scrollIntoView({ behavior: "smooth", block: "center" });
+    target.scrollIntoView({
+      behavior: smooth ? "smooth" : "auto",
+      block: "center",
+    });
     highlightId = owner;
     if (highlightTimer) {
       clearTimeout(highlightTimer);
@@ -229,7 +232,7 @@
         ui.clearJump();
         await loadAround(pending.messageId);
         await tick();
-        jumpToMessage(pending.messageId);
+        jumpToMessage(pending.messageId, false);
         return;
       }
       const page = await listMessages(chatId, {
@@ -514,11 +517,12 @@
 
   async function goTo(messageId: number) {
     try {
-      if (ownerOf(messageId) === null) {
+      const loaded = ownerOf(messageId) !== null;
+      if (!loaded) {
         await loadAround(messageId);
       }
       await tick();
-      jumpToMessage(messageId);
+      jumpToMessage(messageId, loaded);
     } catch {
       toasts.error(t("thread.loadFailed"));
     }

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

@@ -20,7 +20,7 @@
     chats.enrich(chatId);
   });
 
-  $effect(() => {
+  $effect.pre(() => {
     if (linkedMessage === null) {
       return;
     }