perf: memo GridCard, fuse save fns, fix slash tab active color

memento-note/components/home-client.tsx

@@ -557,6 +557,15 @@ export function HomeClient({
     emitNoteChange({ type: 'updated', note: fresh })
   }, [patchNoteInList])
 
+  const handleNoteIllustrationDeleted = useCallback((noteId: string) => {
+    patchNoteInList(noteId, { illustrationSvg: null })
+    setNotes((prev) => {
+      const updated = prev.find((n) => n.id === noteId)
+      if (updated) emitNoteChange({ type: 'updated', note: { ...updated, illustrationSvg: null } })
+      return prev
+    })
+  }, [patchNoteInList])
+
   const handleGridReorder = useCallback(
     async (orderedIds: string[]) => {
       setSortOrder('manual')
@@ -1174,6 +1183,7 @@ export function HomeClient({
                 onMoveToNotebook={handleMoveNoteToNotebook}
                 onNotePatch={handleNoteContentPatch}
                 onNoteIllustrationGenerated={handleNoteIllustrationGenerated}
+                onNoteIllustrationDeleted={handleNoteIllustrationDeleted}
                 onGridReorder={handleGridReorder}
               />
             )}