Refactor UI auth flow, remove uploads app files

Rework client UI state: move and update showLogin/showApp in public/app.js to explicitly set display styles when toggling screens and ensure user info and file load on app show. Remove the theme toggle from public/index.html and simplify CSS by collapsing color variable definitions (dark-theme-focused) in public/style.css. Add a VS Code workspace file. Remove the old uploads/Think app (Dockerfile, package.json, server.js and associated lockfile).

public/app.js

@@ -65,18 +65,7 @@ document.getElementById('logout-btn').addEventListener('click', async () => {
     window.location.reload();
 });
 
-function showLogin() {
-    loginScreen.classList.remove('hidden');
-    appScreen.classList.add('hidden');
-}
 
-function showApp() {
-    loginScreen.classList.add('hidden');
-    appScreen.classList.remove('hidden');
-    document.getElementById('user-display').textContent = currentUser.username;
-    loadFiles();
-    updateViewIcon();
-}
 
 // --- View Mode ---
 function toggleView() {
@@ -94,6 +83,27 @@ function updateViewIcon() {
 }
 viewToggleBtn.addEventListener('click', toggleView);
 
+
+
+
+// --- Auth / UI State ---
+
+function showLogin() {
+    // Force style to ensure hidden/visible
+    loginScreen.classList.remove('hidden');
+    loginScreen.style.display = 'flex';
+    appScreen.classList.add('hidden');
+}
+
+function showApp() {
+    loginScreen.classList.add('hidden');
+    loginScreen.style.display = 'none'; // Force hide
+    appScreen.classList.remove('hidden');
+    document.getElementById('user-display').textContent = currentUser.username;
+    loadFiles();
+    updateViewIcon();
+}
+
 // --- Files ---
 async function loadFiles(path = currentPath) {
     try {