feat: add stable query key factory

src/shared/api/queryKeys.ts

@@ -0,0 +1,23 @@
+/**
+ * Stable query key factory for font-related queries.
+ * Ensures consistent serialization for batch requests by sorting IDs.
+ */
+export const fontKeys = {
+    /** Base key for all font queries */
+    all: ['fonts'] as const,
+
+    /** Keys for font list queries */
+    lists: () => [...fontKeys.all, 'list'] as const,
+    /** Specific font list key with filter parameters */
+    list: (params: object) => [...fontKeys.lists(), params] as const,
+
+    /** Keys for font batch queries */
+    batches: () => [...fontKeys.all, 'batch'] as const,
+    /** Specific batch key, sorted for stability */
+    batch: (ids: string[]) => [...fontKeys.batches(), [...ids].sort()] as const,
+
+    /** Keys for font detail queries */
+    details: () => [...fontKeys.all, 'detail'] as const,
+    /** Specific font detail key by ID */
+    detail: (id: string) => [...fontKeys.details(), id] as const,
+} as const;