fix: B2B "Skontaktuj się" now uses new conversation system

Changed B2B classified contact link from old messages_new to new
conversations page with ?new_to=USER_ID parameter. JS creates a
1:1 conversation via API and opens it, or opens existing one if
already present. Messages now visible in the conversations inbox.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

static/js/conversations.js

@@ -3160,6 +3160,34 @@
                 ConversationList.selectConversation(convId);
             }
         }
+
+        // If URL has ?new_to=<user_id>, open new message modal with pre-selected recipient
+        var newToParam = urlParams.get('new_to');
+        if (newToParam) {
+            var targetUserId = parseInt(newToParam);
+            if (targetUserId) {
+                // Check if conversation with this user already exists (1:1)
+                var existingConv = state.conversations.find(function (c) {
+                    return !c.is_group && c.members && c.members.some(function (m) {
+                        return m.user_id === targetUserId;
+                    });
+                });
+                if (existingConv) {
+                    ConversationList.selectConversation(existingConv.id);
+                } else {
+                    // Open new message modal — create conversation via API, then open it
+                    fetch('/api/conversations', {
+                        method: 'POST',
+                        headers: { 'Content-Type': 'application/json', 'X-CSRFToken': window.__CSRF_TOKEN__ },
+                        body: JSON.stringify({ member_ids: [targetUserId] })
+                    }).then(function (r) { return r.json(); }).then(function (data) {
+                        if (data.id) {
+                            window.location.href = '/wiadomosci?conv=' + data.id;
+                        }
+                    }).catch(function () {});
+                }
+            }
+        }
     }
 
     if (document.readyState === 'loading') {

templates/classifieds/view.html

@@ -727,7 +727,7 @@
                     </svg>
                     <span id="interestBtnText">{% if user_interested %}Zainteresowany{% else %}Jestem zainteresowany{% endif %}</span>
                 </button>
-                <a href="{{ url_for('messages_new', to=classified.author_id, context_type='classified', context_id=classified.id) }}" class="btn btn-primary">Skontaktuj sie</a>
+                <a href="{{ url_for('messages.conversations_page') }}?new_to={{ classified.author_id }}" class="btn btn-primary">Skontaktuj sie</a>
             </div>
             {% endif %}
         </div>

templates/messages/conversations.html

@@ -326,7 +326,7 @@ window.__CSRF_TOKEN__ = '{{ csrf_token() }}';
 // Load conversations.js after data is set
 (function() {
     var s = document.createElement('script');
-    s.src = '{{ url_for("static", filename="js/conversations.js") }}?v=25';
+    s.src = '{{ url_for("static", filename="js/conversations.js") }}?v=26';
     document.body.appendChild(s);
 })();
 {% endblock %}