feat(mobile): progressive home UX, smooth transitions, predictive back, and instant details hydration

[Himanth-reddy]

Summary

This PR delivers comprehensive UI/UX refinements across the mobile app, focusing on progressive loading, layout stability, unified screen transitions, predictive back integration, instant media hydration, and a horizontal sliding season viewport:

1. Progressive Home UX & Catalog Stabilization

• Progressive Catalog Hydration: Streams default TMDB catalogs immediately on launch while lazily resolving custom MDBList/metadata catalogs in the background to eliminate initial startup blocking.
• Infinite Pagination Loop Fix: Enforced robust pagination guards and keyed row stability to prevent redundant recomposition/re-triggering loops.
• Hero & Branding Polish: Refined hero banner with smooth SVG branding overlays, responsive aspect ratios, and asynchronous background IMDb rating hydration.
• Mobile Sports Feed Clean-Up: Dynamically omits inactive/locked live sports rows from the mobile feed when no sports addon is installed, leaving TV defaults and catalog presets 100% untouched.

2. Horizontal Sliding Season Viewport Transition

• Stationary Controls & Clean Motion: Keeps season selector pills, headers, and metadata stationary while animating the entire episode area as a unified horizontal sliding viewport.
• Physics-Based Directional Slide: Moving forward (e.g. S1 → S2) smoothly translates exiting content out left and enters new content from the right; moving backward translates in reverse using CubicBezierEasing(0.25f, 0.1f, 0.25f, 1.0f) over 340ms.
• Simultaneous Season Rendering & Validation: Caches episodes per season so both exiting and entering seasons render valid data simultaneously. On un-cached shows, clean episode card skeletons slide in while fetching without showing stale episodes.
• Background Season Priming: Automatically pre-fetches all seasons for a show in the background on details load for instant 0ms switching across seasons.
• Episode Skeleton Polish: Removed rating skeletons to keep loading viewports uncluttered; ratings smoothly fade in (AnimatedVisibility) once scraped and ready.

3. Profile Selection & Persistent Viewport

• Seamless Profile Switch: Redesigned profile selection flow with smooth shared loading animations and unified persistent viewports across mobile destinations.
• Visual Continuity: Avoids harsh screen flashes or jumpy layout recalculations when switching between profiles or returning to home.

4. Search & Details Refinements

• Search Card Layout: Aligned single-line title typography with ellipsis, unified badge positioning, and added smooth fade transitions for clearlogos.
• Details Logo & Title Fallback: Centered clearlogo in media details without premature raw text flashing, added smooth crossfade metadata/button transitions, and ensured fallback title text is cleanly rendered when a title has no logo.
• Instant Details Hydration: Shared in-memory and disk logo/item caching across HomeScreen, SearchScreen, and DetailsScreen so backdrop and logo render on frame 0 without skeleton lag.

5. Settings & Predictive Back Navigation

• Telegram & Plugins Subpages: Integrated Telegram settings into MobileSettingsSubPage with standard navigation header and visual consistency.
• Predictive Back Gestures: Scoped modal BackHandlers so predictive back gestures smoothly reveal the parent Settings screen underneath for both Telegram and Plugins.

Verification

• Rebased cleanly onto upstream/main with all conflicts resolved.
• Built staging build :app:assembleSideloadStaging cleanly with zero compiler errors.
• Verified on physical test device covering profile selection, home streaming, search filtering, media details entry, season slide animations, and predictive back navigation.