fix: preserve list scroll position when tagging an email

app/[locale]/page.tsx

@@ -139,6 +139,7 @@ export default function Home() {
     deleteEmail,
     markAsRead,
     toggleStar,
+    setEmailKeywordsLocal,
     moveToMailbox,
     moveThreadToMailbox,
     searchEmails,
@@ -1085,11 +1086,9 @@ export default function Home() {
       // Update email keywords via JMAP
       await client.updateEmailKeywords(emailId, keywords);
 
-      // Update local state
-      selectEmail(email.id === selectedEmail?.id ? { ...email, keywords } : selectedEmail);
-
-      // Refresh emails list to show color in list
-      await fetchEmails(client, selectedMailbox);
+      // Patch the email in place so the list keeps its scroll/pagination state
+      // instead of being reset to the first page by a full refetch.
+      setEmailKeywordsLocal(emailId, keywords);
 
       // Refresh tag counts
       fetchTagCounts(client);

stores/email-store.ts

@@ -85,6 +85,7 @@ interface EmailStore {
   clearSearchFilters: () => void;
   toggleAdvancedSearch: () => void;
   toggleStar: (client: IJMAPClient, emailId: string) => Promise<void>;
+  setEmailKeywordsLocal: (emailId: string, keywords: Record<string, boolean>) => void;
 
   // Batch operations
   batchMarkAsRead: (client: IJMAPClient, read: boolean) => Promise<void>;
@@ -1057,6 +1058,17 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
     }
   },
 
+  setEmailKeywordsLocal: (emailId, keywords) => {
+    set((state) => ({
+      emails: state.emails.map(e =>
+        e.id === emailId ? { ...e, keywords: { ...keywords } } : e
+      ),
+      selectedEmail: state.selectedEmail?.id === emailId
+        ? { ...state.selectedEmail, keywords: { ...keywords } }
+        : state.selectedEmail,
+    }));
+  },
+
   // Batch operations
   batchMarkAsRead: async (client, read) => {
     const { selectedEmailIds, emails, mailboxes } = get();