feat: Hide AI buttons when AI is not configured. Closes #905

- InvestigateProblemsButton now checks aiChatStore.enabled
- InvestigateAlertButton returns null when AI is not enabled
- This provides cleaner UX for users who don't use AI features

frontend-modern/src/components/Alerts/InvestigateAlertButton.tsx

@@ -17,11 +17,17 @@ interface InvestigateAlertButtonProps {
 /**
  * "Ask AI" button for one-click alert investigation.
  * When clicked, opens the AI chat panel with the alert context pre-populated.
+ * Hidden entirely when AI is not configured.
  */
 export function InvestigateAlertButton(props: InvestigateAlertButtonProps) {
     const [isHovered, setIsHovered] = createSignal(false);
     const isLocked = () => props.licenseLocked === true;
 
+    // Don't render if AI is not enabled
+    if (aiChatStore.enabled !== true) {
+        return null;
+    }
+
     const handleClick = (e: MouseEvent) => {
         e.stopPropagation();
         e.preventDefault();

frontend-modern/src/components/Dashboard/InvestigateProblemsButton.tsx

@@ -118,9 +118,9 @@ Start with the most critical problems first.`;
         });
     };
 
-    // Only show if problems mode is active AND there are results
+    // Only show if problems mode is active AND there are results AND AI is enabled
     const shouldShow = createMemo(() =>
-        props.isProblemsMode && props.problemGuests.length > 0
+        props.isProblemsMode && props.problemGuests.length > 0 && aiChatStore.enabled === true
     );
 
     return (