feat: add loading screen customization (animation style, progress style background treatment

[EierKopZA]

✨ Loading Screen Customization

Adds three new cycle settings to the Appearance section that give users full control over how the clearlogo loading screen looks during playback startup and mid-stream buffering.

Settings Added (Appearance section)

Setting	Cycle Order	Default
Loading Animation	Heartbeat → Breathe → Glow → Static	Heartbeat
Loading Progress	Arc → Linear → Percentage → None	Arc
Loading Background	Dark → Backdrop	Dark

Animation Styles

1. Heartbeat — Two quick beats followed by a rest (1.5s cycle). The original behavior, preserved as default.
2. Breathe — Slow, smooth scale from 1.0→1.1→1.0 (3s cycle). A calm, ambient pulse.
3. Glow — Alpha transparency pulses from 0.55→1.0→0.55 (2s cycle). The logo size stays steady while it fades in and out like a glowing ember.
4. Static — No animation at all. The logo renders at full size and opacity.

Progress Styles

1. Arc — Accent-colored circular arc ring around the logo (existing visual, now respects the user's selected accent color).
2. Linear — Accent-colored horizontal progress bar below the logo box, with percentage text beneath.
3. Percentage — Just the percentage number text, no ring or bar overlay.
4. None — No progress indicator at all. Clean logo-only look.

Background Treatment

1. Dark — Solid black background. Clean, minimal, OLED-friendly.
2. Backdrop — Show the content backdrop art behind the logo with a dark overlay (original behavior).

Technical Details

• All progress arcs/bars and percentage text render in the user's selected accent color via LocalAccentColorOverride.current.
• The PulsingLogo composable was rewritten to accept three new parameters (animationStyle, progressStyle, backgroundStyle) that flow from PlayerUiState → PlayerScreen.
• Settings are persisted per-profile via DataStore string keys, matching the existing pattern used by cycleAccentColor().
• The loading screen container conditionally shows/hides backdrop art based on loadingBackground ("Backdrop" shows art + overlay, "Dark" shows plain black).
• Both the initial loading screen and mid-stream buffering overlay respect all three settings.
• Row IDs 38/39/40 were used — no existing settings were shifted or renumbered. D-pad focus flows naturally: Smooth Scrolling → Loading Animation → Loading Progress → Loading Background.

Files Modified

• SettingsViewModel.kt — Added 3 DataStore string keys, 3 state fields (loadingAnimationStyle, loadingProgressStyle, loadingBackground), 3 cycle functions
• SettingsScreen.kt — Added 3 new settings rows to the Appearance section with proper focus wiring
• strings.xml — Added 6 string resources for labels and descriptions
• PlayerViewModel.kt — Added 3 fields to PlayerUiState + DataStore reads in init block
• PlayerScreen.kt — Rewrote PulsingLogo composable (lines 3654→3761) with all animation/progress/background styles; updated loading screen container for backdrop toggle

[Copilot]

Pull request overview

Adds new per-profile Appearance settings to customize the player loading/buffering clearlogo presentation (animation style, progress indicator style, and background treatment), and threads these settings through settings UI → DataStore → player UI.

Changes:

• Added three new cycle settings (loading animation, loading progress, loading background) persisted via DataStore and surfaced in the Appearance section.
• Extended PlayerUiState and SettingsUiState to carry the new preferences and applied them in the loading/buffering UI.
• Updated the loading screen UI to support multiple animation/progress styles and accent-colored indicators.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
app/src/main/res/values/strings.xml	Adds new strings for the three new loading customization rows (labels + descriptions).
app/src/main/kotlin/com/arflix/tv/ui/screens/settings/SettingsViewModel.kt	Adds new DataStore keys/state fields and cycle functions for loading customization preferences.
app/src/main/kotlin/com/arflix/tv/ui/screens/settings/SettingsScreen.kt	Adds three new Appearance rows and wires click handlers to cycle the new preferences.
app/src/main/kotlin/com/arflix/tv/ui/screens/player/PlayerViewModel.kt	Reads new DataStore values into PlayerUiState for use by the player UI.
app/src/main/kotlin/com/arflix/tv/ui/screens/player/PlayerScreen.kt	Updates loading/buffering overlays and rewrites PulsingLogo to support new animation/progress styles.

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