fix(chat): fix mutation card rendering, reappearance after approve, and pseudocode tab switching

- MutationSuggestionCard: call onResolved immediately on approve/reject so
  resolvedIds is set even if component unmounts before dismiss timer fires.
  Invalidate mutations list query to refresh pendingSuggestions.
- AIChatPanel: use explicit null checks instead of falsy for oldValue/newValue
  so empty-string fields (e.g. decompiledCode) render correctly. Remove
  resolvedIds filter from streaming mutationSuggestions — the card manages
  its own lifecycle internally.
- CodeViewer: auto-switch to assembly tab when selecting a function that has
  no pseudocode (derived effectiveTab via useMemo).

src/features/binary/AIChatPanel.tsx

@@ -3,6 +3,8 @@ import { formatDistanceToNow } from "date-fns";
 import { Send, Bot, User, Loader2, Sparkles, Plus, Trash2 } from "lucide-react";
 import ReactMarkdown from "react-markdown";
 import remarkGfm from "remark-gfm";
+import remarkMath from "remark-math";
+import rehypeKatex from "rehype-katex";
 import { Prism as SyntaxHighlighter } from "react-syntax-highlighter";
 import { oneDark } from "react-syntax-highlighter/dist/esm/styles/prism";
 import { useAIChat } from "@/features/binary/hooks/useAIChat";
@@ -25,7 +27,7 @@ const quickPrompts = [
   "Summarize the binary",
 ];
 
-const remarkPlugins = [remarkGfm];
+const remarkPlugins = [remarkGfm, remarkMath];
 
 const codeBlockTheme = {
   ...oneDark,
@@ -352,7 +354,13 @@ export function AIChatPanel({
                 {mergedMessages.map((item, idx) => {
                   if (item.kind === "suggestion") {
                     const s = item.data;
-                    if (!s.id || !s.targetId || !s.oldValue || !s.newValue) return null;
+                    if (
+                      s.id == null ||
+                      s.targetId == null ||
+                      s.oldValue == null ||
+                      s.newValue == null
+                    )
+                      return null;
                     if (resolvedIds.has(s.id)) return null;
                     return (
                       <MutationSuggestionCard
@@ -403,6 +411,7 @@ export function AIChatPanel({
                             <div className={markdownContainerClass}>
                               <ReactMarkdown
                                 remarkPlugins={remarkPlugins}
+                                rehypePlugins={[rehypeKatex]}
                                 components={markdownComponents}
                               >
                                 {normalizeMarkdown(message.content ?? "")}
@@ -477,21 +486,19 @@ export function AIChatPanel({
                     <span>{toolStatus}</span>
                   </div>
                 )}
-                {mutationSuggestions
-                  .filter((s) => !resolvedIds.has(s.mutationId))
-                  .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}
-                    />
-                  ))}
+                {mutationSuggestions.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}
+                  />
+                ))}
               </>
             )}
             <div ref={messagesEndRef} />

src/features/binary/CodeViewer.tsx

@@ -153,8 +153,14 @@ export function CodeViewer({
   const hasCfg = cfgBlocks.length > 0;
   const hasPseudocode = !!func?.decompiledCode;
 
+  const effectiveTab = useMemo(() => {
+    if (activeTab === "pseudocode" && !hasPseudocode) return "assembly";
+    if (activeTab === "cfg" && !hasCfg) return "assembly";
+    return activeTab;
+  }, [activeTab, hasPseudocode, hasCfg]);
+
   return (
-    <Tabs value={activeTab} onValueChange={setActiveTab} className="flex h-full flex-col">
+    <Tabs value={effectiveTab} onValueChange={setActiveTab} className="flex h-full flex-col">
       <div className="border-border flex shrink-0 items-center justify-between gap-2 border-b px-4 py-2">
         <div className="flex items-center gap-3">
           <TabsList className="h-8">

src/features/binary/MutationSuggestionCard.tsx

@@ -158,6 +158,13 @@ export function MutationSuggestionCard({
         if (invalidationKey) {
           queryClient.invalidateQueries({ queryKey: [invalidationKey] });
         }
+        queryClient.invalidateQueries({
+          predicate: (query) =>
+            typeof query.queryKey[0] === "string" &&
+            query.queryKey[0].startsWith("/binaries/") &&
+            query.queryKey[0].endsWith("/mutations"),
+        });
+        onResolved?.(mutationId);
         onRenameApplied?.();
         dismissTimerRef.current = setTimeout(resolve, 1500);
       },
@@ -168,6 +175,13 @@ export function MutationSuggestionCard({
     mutation: {
       onSuccess: () => {
         setStatus("REJECTED");
+        queryClient.invalidateQueries({
+          predicate: (query) =>
+            typeof query.queryKey[0] === "string" &&
+            query.queryKey[0].startsWith("/binaries/") &&
+            query.queryKey[0].endsWith("/mutations"),
+        });
+        onResolved?.(mutationId);
         onRenameApplied?.();
         dismissTimerRef.current = setTimeout(resolve, 1500);
       },