# Specification: UI Theme Overhaul & Style System

## Overview
This track aims to modernize the application's appearance by implementing a professional, high-fidelity UI theme using `imgui-bundle`'s native styling and theming capabilities. It focuses on improving typography, visual shapes, and introducing advanced features like custom shaders, multi-viewport support, and user-managed layout presets.

## Functional Requirements
- **Professional Typography:**
    - Replace the default ImGui font with a high-quality, professional font family (e.g., **Inter** or **Maple Mono**).
    - Implement proper font scaling and anti-aliasing.
- **Style & Theming System:**
    - Utilize `imgui-bundle`'s recommended styling APIs to define a cohesive "professional" theme.
    - Implement a "Subtle Rounding" aesthetic for windows, buttons, and other UI elements.
    - Research and implement the latest text rendering techniques supported by `imgui-bundle` or its forks (e.g., Freetype integration).
- **Advanced Visual Effects (Shaders):**
    - Explore and implement custom shaders for:
        - Rounded window corners and soft shadows.
        - Glass/Acrylic (blur) effects for panels.
        - Improved text anti-aliasing via specialized shaders.
- **Multi-Viewport Support:**
    - Add a toggle in the main menu bar to enable/disable ImGui's **Multi-Viewport** feature (allowing panels to be dragged outside the main application window).
- **UI Layout Presets:**
    - Implement a system for users to save and manage custom window layouts.
    - Layout presets must capture window positions, sizes, and the current **Multi-Viewport** state.

## Non-Functional Requirements
- **Performance:** Ensure that custom shaders and advanced rendering do not significantly impact the application's frame rate (FPS).
- **Compatibility:** The new theme and style system must be compatible across all supported platforms (win32).
- **Reliability:** Layout presets must be persisted correctly and restored accurately.

## Acceptance Criteria
- [ ] The default font is changed to Inter or Maple Mono with high-quality rendering.
- [ ] The UI has a consistent "Subtle Rounding" aesthetic across all standard widgets.
- [ ] A "Multi-Viewport" toggle is available in the menu bar and works as expected.
- [ ] Users can save multiple window layout presets and switch between them.
- [ ] Custom shaders are implemented for at least one major effect (e.g., rounded corners or acrylic blur) without degrading performance.

## Out of Scope
- Complete redesign of the Hub-based layout logic (only styling/theming).
- Cloud-based layout synchronization.
