diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 0000000..f0adc6b
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,3 @@
+## 2024-05-14 - Missing Loading States on Async Actions
+**Learning:** In the ClimaAI app, form buttons (Login, Register, Google Auth) lack visual feedback and disable states during async API requests.
+**Action:** Always add loading spinners/text changes and disable the button natively (via `disabled=true` and `aria-busy=true`) during async submissions to prevent double-clicks and provide immediate feedback. Use `try...finally` to ensure state is cleaned up robustly.
diff --git a/web-demo/js/app.js b/web-demo/js/app.js
index 11508de..3ccf8a7 100644
--- a/web-demo/js/app.js
+++ b/web-demo/js/app.js
@@ -144,6 +144,15 @@ class ClimaAI {
         e.preventDefault();
         const email = document.getElementById('loginEmail').value;
         const password = document.getElementById('loginPassword').value;
+        const submitBtn = e.submitter;
+        let originalContent = '';
+
+        if (submitBtn) {
+            originalContent = submitBtn.innerHTML;
+            submitBtn.disabled = true;
+            submitBtn.setAttribute('aria-busy', 'true');
+            submitBtn.innerHTML = 'Signing in...';
+        }
 
         try {
             this.showToast('Logging in...', 'info');
@@ -155,6 +164,12 @@ class ClimaAI {
             this.checkSubscription();
         } catch (error) {
             this.showToast(error.message || 'Login failed', 'error');
+        } finally {
+            if (submitBtn) {
+                submitBtn.disabled = false;
+                submitBtn.removeAttribute('aria-busy');
+                submitBtn.innerHTML = originalContent;
+            }
         }
     }