fix(chat): hide mutation suggestion cards when no session is selected

Skip pendingSuggestions in mergedMessages and previousMutationSuggestions
rendering when activeSessionId is null. Also fix empty state check to not
consider API suggestions as content when no session is active.

src/features/binary/AIChatPanel.tsx

@@ -168,9 +168,11 @@ export function AIChatPanel({
       | { kind: "suggestion"; data: MutationSuggestionResponse }
     > = messages.map((m) => ({ kind: "message" as const, data: m }));
 
-    for (const s of pendingSuggestions ?? []) {
-      if (!s.createdAt) continue;
-      items.push({ kind: "suggestion" as const, data: s });
+    if (activeSessionId) {
+      for (const s of pendingSuggestions ?? []) {
+        if (!s.createdAt) continue;
+        items.push({ kind: "suggestion" as const, data: s });
+      }
     }
 
     items.sort((a, b) => {
@@ -180,7 +182,7 @@ export function AIChatPanel({
     });
 
     return items;
-  }, [messages, pendingSuggestions]);
+  }, [messages, pendingSuggestions, activeSessionId]);
 
   // Track manual scroll to respect user reading position
   useEffect(() => {
@@ -319,7 +321,9 @@ export function AIChatPanel({
         ref={scrollContainerRef}
         className="flex min-h-0 flex-1 flex-col overflow-x-hidden overflow-y-auto"
       >
-        {messages.length === 0 && !pendingSuggestions?.length && !isStreaming ? (
+        {messages.length === 0 &&
+        !(activeSessionId && pendingSuggestions?.length) &&
+        !isStreaming ? (
           <div className="flex flex-1 flex-col items-center justify-center p-4">
             <Bot className="text-muted-foreground mx-auto mb-4 h-12 w-12" />
             <h3 className="text-foreground mb-2 font-medium">AI Analysis Assistant</h3>
@@ -432,26 +436,27 @@ export function AIChatPanel({
                 })}
               </>
             )}
-            {previousMutationSuggestions
-              .filter(
-                (s, i, arr) =>
-                  !pendingIds.has(s.mutationId) &&
-                  !resolvedIds.has(s.mutationId) &&
-                  arr.findIndex((x) => x.mutationId === s.mutationId) === i
-              )
-              .map((s) => (
-                <MutationSuggestionCard
-                  key={s.mutationId}
-                  mutationId={s.mutationId}
-                  targetType={s.targetType}
-                  targetId={s.targetId}
-                  fieldName={s.fieldName}
-                  oldValue={s.oldValue}
-                  newValue={s.newValue}
-                  onRenameApplied={onRenameApplied}
-                  onResolved={handleResolved}
-                />
-              ))}
+            {activeSessionId &&
+              previousMutationSuggestions
+                .filter(
+                  (s, i, arr) =>
+                    !pendingIds.has(s.mutationId) &&
+                    !resolvedIds.has(s.mutationId) &&
+                    arr.findIndex((x) => x.mutationId === s.mutationId) === i
+                )
+                .map((s) => (
+                  <MutationSuggestionCard
+                    key={s.mutationId}
+                    mutationId={s.mutationId}
+                    targetType={s.targetType}
+                    targetId={s.targetId}
+                    fieldName={s.fieldName}
+                    oldValue={s.oldValue}
+                    newValue={s.newValue}
+                    onRenameApplied={onRenameApplied}
+                    onResolved={handleResolved}
+                  />
+                ))}
             {isStreaming && (
               <>
                 <div className="mb-4 flex gap-3">