- Introduces a new `SettingsCategory` enum to define and manage distinct settings sections (e.g., Library, Appearance, Playback).
- Creates `SettingsCategoryScreen.kt` to dynamically display the settings for a given category, reusing existing setting components.
- Refactors the main `SettingsScreen.kt` to act as a hub, displaying a list of these categories instead of all individual settings.
- Adds navigation logic to handle routing from `SettingsScreen` to the new `SettingsCategoryScreen` based on the selected category ID.
- Introduces `SettingsComponents.kt` to centralize shared UI components like `SettingsItem`, `ThemeSelectorItem`, and `SliderSettingsItem` that are now used across both the old and new settings screens.
- Implements a new `ExpressiveCategoryItem` composable for the main settings hub, providing a visually distinct entry for each category with an icon, title, and subtitle.

- Add `SettingsCategory` to the list of screens that hide the bottom navigation bar in `MainActivity`.
- Allow the `ExpressiveTopBarContent` title to wrap to a second line and scale from the left-center to prevent overflow with longer text.
- Remove the hamburger menu icon from `GradientTopBar` and adjust padding for the "Beta" button.
- Remove explicit start padding from the "Experimental" settings screen title to align with the updated top bar.

…s across various components

Refactors the `ExpressiveTopBarContent` composable to use explicit padding parameters instead of a `Pair`, improving clarity and control over title animation.

- Replaces `titlePaddingRange` with `collapsedTitleStartPadding` (default 68dp) and `expandedTitleStartPadding` (default 16dp).
- Updates `StatsScreen`, `EqualizerScreen`, and `SettingsCategoryScreen` to use these new padding parameters for a consistent look.
- Adds `zIndex(1f)` to the back buttons in `StatsScreen` and `SettingsScreen` to ensure they render above the animating title text.
- Adjusts miscellaneous layout spacing and conditions for title wrapping in `SettingsScreen` and `SettingsCategoryScreen` to align with the new top bar behavior.

This commit introduces a significant visual redesign of the Stats screen, replacing the main summary card with two distinct hero cards and converting the timeline from a horizontal list to a vertical bar chart.

- **Stats Screen Hero:**
    - Replaces the single large summary card (`StatsSummaryCard`) with a new `StatsHeroSection`.
    - This new section consists of two side-by-side `HeroCard`s for "Listening Time" and "Total Plays", using `primaryContainer` and `tertiaryContainer` for background colors.

- **Listening Timeline Chart:**
    - Replaces the horizontal progress bar list with a vertical bar chart design.
    - Bars are now vertically oriented with rounded top corners (`RoundedCornerShape(topStart = 8.dp, topEnd = 8.dp)`).
    - The chart now supports horizontal scrolling when the number of data points is large.
    - Bar color is simplified to `MaterialTheme.colorScheme.primary`.

- **Removed "Daily Rhythm" Section:**
    - The `DailyListeningDistributionSection` and its related components (`DailyListeningTimeline`, `WeeklyDailyListeningTimeline`) have been completely removed from the UI.

- **Minor UI Tweaks:**
    - **Equalizer Screen:** Adjusts the expanded title start padding for better alignment.
    - **Top Artists/Tracks Chart:** Simplifies the bar background from a gradient to a solid color.

This commit introduces several UI refinements to the Equalizer and Settings screens.

On the Equalizer screen:
- Enlarges the preset selection container for better touch targets.
- Adjusts padding and spacing around sliders and presets for a more balanced layout.

On the Settings screen:
- Implements custom, theme-aware colors for each settings category icon, improving visual distinction.
- Adds `ExpressiveSettingsGroup` to visually group related settings items.
- Ensures category subtitles do not overflow their container.

- Replace outlined settings icons with rounded variants.
- Remove background from expressive category items for a cleaner look.
- Disable the swipe gesture for opening the sidebar.
- Comment out the sidebar-opening functionality from the home screen's menu button.