feat: Add Vector Viz tab to app home page

- Add Vector Viz button to tab navigation
- Embed viz pane in iframe for seamless integration
- Only shown when vector sync is enabled

nextcloud_mcp_server/auth/userinfo_routes.py

@@ -858,6 +858,18 @@ async def user_info_html(request: Request) -> HTMLResponse:
                     Webhooks
                 </button>
                 '''
+    }
+                {
+        ""
+        if not show_vector_sync_tab
+        else '''
+                <button
+                    class="tab"
+                    :class="activeTab === 'vector-viz' ? 'active' : ''"
+                    @click="activeTab = 'vector-viz'">
+                    Vector Viz
+                </button>
+                '''
     }
             </div>
 
@@ -889,6 +901,17 @@ async def user_info_html(request: Request) -> HTMLResponse:
                 </div>
                 '''
     }
+
+                {
+        ""
+        if not show_vector_sync_tab
+        else '''
+                <!-- Vector Viz Tab -->
+                <div class="tab-pane" x-show="activeTab === 'vector-viz'" x-transition.opacity.duration.150ms>
+                    <iframe src="/app/vector-viz" style="width: 100%; height: 800px; border: none;"></iframe>
+                </div>
+                '''
+    }
             </div>
 
             {