Flutter App Modern UI Redesign

I have a fully functional Flutter application that feels a little dated, and I want to bring it in line with a clean, modern aesthetic. The core functionality stays exactly as it is; this job is strictly about visual polish.

Here is what I need from you:

• Revamp icons and buttons so they look crisp, consistent, and contemporary, then wire them back into the current Flutter codebase.
• Harmonise the colour scheme across all screens, ensuring proper contrast, accessibility, and a cohesive look.
• Tidy up typography—heading hierarchy, font weights, and spacing—so the interface feels balanced and readable on both Android and iOS.

I already have the source code on a private Git repository. You will fork the repo, work in a dedicated branch, and submit a pull request once the UI updates compile without errors on both platforms. If you prefer sketching in Figma or Adobe XD first, feel free, but the final deliverable must be the updated Flutter widgets and asset files.

Acceptance criteria
1. All screens compile and run with no layout overflows.
2. Dark and light modes display consistent colours.
3. Icons render sharply on all common display densities.
4. No regressions in existing navigation or state management.

If this sounds straightforward, let’s get started and give my users a fresher, more engaging experience.