fix(postcard): mark-sent also uses fetch+reload, stays on current page

app/routers/web.py

@@ -919,7 +919,7 @@ async def mark_delivered(
 
 
 @router.post("/postcards/{postcard_id}/mark-sent")
-def mark_sent(
+async def mark_sent(
     postcard_id: int,
     user: User = Depends(get_current_user_web),
     db: Session = Depends(get_db),
@@ -932,12 +932,12 @@ def mark_sent(
         .first()
     )
     if not pc:
-        return _redirect("/profiles")
+        return JSONResponse({"ok": False}, status_code=404)
     pc.status = "sent"
     if not pc.send_time:
         pc.send_time = datetime.now()
     db.commit()
-    return _redirect(f"/postcards/{postcard_id}")
+    return JSONResponse({"ok": True})
 
 
 # ---------- Image Upload ----------

app/templates/postcard_detail.html

@@ -10,9 +10,7 @@
     <div class="detail-actions">
         <a href="/postcards/{{ postcard.id }}/edit" class="btn">{{ 'pc_detail.edit'|t(user.language) }}</a>
         {% if postcard.status == 'pending' %}
-        <form method="post" action="/postcards/{{ postcard.id }}/mark-sent" class="inline">
+        <button type="button" class="btn btn-primary" onclick="if(confirm('{{ 'pc_detail.confirm_sent'|t(user.language) }}'))fetch('/postcards/{{ postcard.id }}/mark-sent',{method:'POST'}).then(function(){location.reload();})">{{ 'pc_detail.mark_sent'|t(user.language) }}</button>
-            <button type="submit" class="btn btn-primary" onclick="return confirm('{{ 'pc_detail.confirm_sent'|t(user.language) }}')">{{ 'pc_detail.mark_sent'|t(user.language) }}</button>
-        </form>
         {% elif postcard.status == 'sent' %}
         <button type="button" class="btn btn-primary" onclick="if(confirm('{{ 'pc_detail.confirm_delivered'|t(user.language) }}'))fetch('/postcards/{{ postcard.id }}/mark-delivered',{method:'POST'}).then(function(){location.reload();})">{{ 'pc_detail.mark_delivered'|t(user.language) }}</button>
         {% endif %}

app/templates/postcards.html

@@ -56,9 +56,7 @@
     {% if pc.notes %}<span class="postcard-row-notes">{{ pc.notes[:50] }}{% if pc.notes|length > 50 %}…{% endif %}</span>{% endif %}
     <div class="postcard-row-action">
         {% if pc.status == 'pending' %}
-        <form method="post" action="/postcards/{{ pc.id }}/mark-sent" onclick="event.preventDefault();event.stopPropagation();if(confirm('{{ 'pc_list.confirm_sent'|t(user.language) }}'))this.submit();">
+        <button type="button" class="btn btn-sm btn-primary" onclick="event.preventDefault();event.stopPropagation();if(confirm('{{ 'pc_list.confirm_sent'|t(user.language) }}'))fetch('/postcards/{{ pc.id }}/mark-sent',{method:'POST'}).then(function(){location.reload();})">{{ 'pc_list.mark_sent'|t(user.language) }}</button>
-            <button type="submit" class="btn btn-sm btn-primary">{{ 'pc_list.mark_sent'|t(user.language) }}</button>
-        </form>
         {% elif pc.status == 'sent' %}
         <button type="button" class="btn btn-sm btn-primary" onclick="event.preventDefault();event.stopPropagation();if(confirm('{{ 'pc_list.confirm_delivered'|t(user.language) }}'))fetch('/postcards/{{ pc.id }}/mark-delivered',{method:'POST'}).then(function(){location.reload();})">{{ 'pc_list.mark_delivered'|t(user.language) }}</button>
         {% endif %}