Flutter Package Name & Splash Update

I have an existing Flutter project and I’m ready to hand over both the new package name and a finished splash-screen design. All I need is a clean, reliable swap:

• Update the package/bundle identifier everywhere it appears in the Android and iOS folders so the app installs as a fresh build without conflicts.
• Replace the current splash screen with my supplied assets, making sure it scales correctly on every supported device.

No extra features or interface tweaks are required—just these two tasks. A quick test build for each platform that opens with the new splash and shows the updated package name in the package manager will be the acceptance milestone.