fix: increase auto-save debounce and saved status duration to improve user experience

Author: athrvk

app/src/hooks/useSaveManager.ts

@@ -19,8 +19,8 @@
 import { useEffect, useRef, useCallback } from "react";
 import { useSaveStore } from "@/stores/save-store";
 
-const AUTO_SAVE_DELAY_MS = 800; // 800ms debounce
-const SAVED_STATUS_DURATION_MS = 2000; // Show "saved" for 2 seconds
+const AUTO_SAVE_DELAY_MS = 3000; // 3000ms debounce
+const SAVED_STATUS_DURATION_MS = 3000; // Show "saved" for 3 seconds
 
 interface UseSaveManagerOptions {
 	/** Unique identifier for this save context (e.g., request ID) */