Resolve error with UI demo on proj update (file upload) and proj deletion

static/auth.js

@@ -24,6 +24,12 @@
       // Trigger project loading after successful auth
       if (window.__sb_load_projects) {
         window.__sb_load_projects();
+        // Update upload button after a short delay to ensure projects are loaded
+        setTimeout(() => {
+          if (window.__sb_update_upload_button) {
+            window.__sb_update_upload_button();
+          }
+        }, 100);
       }
     } else {
       userInfo.style.display = 'none';

static/projects.js

@@ -34,6 +34,14 @@
     deleteProjectBtn.addEventListener('click', handleDeleteProject);
   }
 
+  function handleDeleteProject() {
+    if (!currentProject) return;
+    
+    if (confirm(`Are you sure you want to delete "${currentProject.name}"? This will remove all associated files and chat history.`)) {
+      deleteProject(currentProject.project_id);
+    }
+  }
+
   async function loadProjects() {
     const user = window.__sb_get_user();
     if (!user) return;
@@ -52,6 +60,11 @@
           // Select first project by default
           selectProject(projects[0]);
         }
+        
+        // Update upload button after projects are loaded
+        if (window.__sb_update_upload_button) {
+          window.__sb_update_upload_button();
+        }
       }
     } catch (error) {
       console.error('Failed to load projects:', error);
@@ -130,6 +143,15 @@
     if (window.__sb_update_page_title) {
       window.__sb_update_page_title(`Project: ${project.name}`);
     }
+    
+    // Dispatch custom event to notify other scripts that project has changed
+    const event = new CustomEvent('projectChanged', { detail: { project } });
+    document.dispatchEvent(event);
+    
+    // Update upload button if the function exists
+    if (window.__sb_update_upload_button) {
+      window.__sb_update_upload_button();
+    }
   }
 
   function showWelcomeScreen() {

static/script.js

@@ -29,6 +29,14 @@
     setupFileDropZone();
     setupEventListeners();
     checkUserAuth();
+    
+    // Listen for project changes
+    document.addEventListener('projectChanged', () => {
+      updateUploadButton();
+    });
+    
+    // Initial button state update
+    updateUploadButton();
   }
 
   function setupFileDropZone() {
@@ -422,8 +430,13 @@
         enableChat();
       }
     }
+    // Always update upload button state
+    updateUploadButton();
   }
 
+  // Public API
+  window.__sb_update_upload_button = updateUploadButton;
+
   // Listen for project changes
   window.addEventListener('projectChanged', () => {
     updateUploadButton();