improvement(byok): guard double-submit, Enter-to-save on key field, cap hint in manage modal

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/settings/components/byok/byok-key-manager.tsx

@@ -202,7 +202,7 @@ export function BYOKKeyManager(props: BYOKKeyManagerProps) {
   }
 
   const handleSave = async () => {
-    if (!editing || !apiKeyInput.trim()) return
+    if (!editing || !apiKeyInput.trim() || isSaving) return
 
     setError(null)
     try {
@@ -406,6 +406,9 @@ export function BYOKKeyManager(props: BYOKKeyManagerProps) {
                 }}
                 placeholder={editingMeta?.placeholder}
                 className={CHIP_FIELD_INPUT}
+                onKeyDown={(e) => {
+                  if (e.key === 'Enter') handleSave()
+                }}
                 name='byok_api_key'
                 autoComplete='off'
                 autoCorrect='off'

apps/sim/app/workspace/[workspaceId]/settings/components/byok/byok-provider-keys-modal.tsx

@@ -64,6 +64,11 @@ export function BYOKProviderKeysModal({
             </div>
           ))}
         </div>
+        {atCapacity && (
+          <p className='px-2 text-[12px] text-[var(--text-muted)]'>
+            Key limit reached ({maxKeys} keys per provider).
+          </p>
+        )}
       </ChipModalBody>
       <ChipModalFooter
         onCancel={close}