chore: snapshot before performance optimization

keep-notes/lib/utils.ts

@@ -34,18 +34,30 @@ export function deepEqual(a: unknown, b: unknown): boolean {
 }
 
 /**
- * Parse a database note object into a typed Note
- * Handles JSON string fields that are stored in the database
+ * Coerce a Prisma Json value into an array (or return fallback).
+ * Handles null, undefined, string (legacy JSON), object, etc.
+ */
+export function asArray<T = unknown>(val: unknown, fallback: T[] = []): T[] {
+  if (Array.isArray(val)) return val
+  if (typeof val === 'string') {
+    try { const p = JSON.parse(val); return Array.isArray(p) ? p : fallback } catch { return fallback }
+  }
+  return fallback
+}
+
+/**
+ * Parse a database note object into a typed Note.
+ * Guarantees array fields are always real arrays or null.
  */
 export function parseNote(dbNote: any): Note {
   return {
     ...dbNote,
-    checkItems: dbNote.checkItems ? JSON.parse(dbNote.checkItems) : null,
-    labels: dbNote.labels ? JSON.parse(dbNote.labels) : null,
-    images: dbNote.images ? JSON.parse(dbNote.images) : null,
-    links: dbNote.links ? JSON.parse(dbNote.links) : null,
-    embedding: dbNote.embedding ? JSON.parse(dbNote.embedding) : null,
-    sharedWith: dbNote.sharedWith ? JSON.parse(dbNote.sharedWith) : [],
+    checkItems: asArray(dbNote.checkItems, null as any) ?? null,
+    labels: asArray(dbNote.labels) || null,
+    images: asArray(dbNote.images) || null,
+    links: asArray(dbNote.links) || null,
+    embedding: asArray<number>(dbNote.embedding) || null,
+    sharedWith: asArray(dbNote.sharedWith),
     size: dbNote.size || 'small',
   }
 }