Fix Google Photos pagination (#155) & Add Spanish translation (i18n)

[miguelsg29]

Closes #155

Summary of Changes

This PR addresses Issue #155 regarding Google Photos shared album crawling and portrait photo display quality, and introduces full Spanish language support (i18n) across the entire Immortal launcher ecosystem.

1. Google Photos Album Pagination & High Resolution

• Full Album Pagination: Implemented extractGoogleAlbumKey, extractGoogleContinuationToken, and fetchGoogleBatchRpc crawling in RemoteAlbum.kt so shared albums with >30 photos load all items (up to 100 pages / 10,000 photos) instead of capping at the initial HTML chunk.
• High-Res Image Suffix: Updated CDN size suffix to =w${maxDim}-h${maxDim}-no where maxDim = maxOf(screenW, screenH). This prevents 9:16 portrait photos from downscaling to low resolution inside the bounding box.

2. Portrait Photo Display & Motion Enhancements

• Aspect-Ratio Preserved Background Blur: Added an aspect-ratio-preserving background blur layer (blurPhoto) for portrait photos. Eliminates black side bars without squishing or stretching the image.
• Dual-Layer Buffer Crossfade: Replaced abrupt photo swapping with a 900ms dual-layer (layerA & layerB) crossfade transition for smooth photo changes without visual pops or black flashes.
• Clipped Picture Frame: Wrapped frontal photos in a fixed-size photoFrameContainer (clipChildren = true, clipToOutline = true), so Ken Burns zoom/pan motion occurs gracefully inside the frame without edge flickering.
• Optional Vertical Photo Trimming (cropVertical): Added a user-configurable toggle in ScreensaverConfig (cropVertical) and SettingsDomains.screensaver ("Crop vertical photos (~20%)") to trim ~10% off top and bottom of portrait photos.

3. Complete Spanish Language Support (i18n)

• Settings Registry & Options: Fully localized all settings domains (immortal, screensaver, calendar, welcome, sunrise, chime, mqtt, quickbar, digitalclock) into Spanish.
• App Store & Catalog: Localized app store catalog titles, summaries, app descriptions, categories, search placeholders, and action buttons ("Instalar", "Abrir", "Actualizar", "Actualizar todo", etc.).
• Home Grid & App Switcher: Translated built-in tile labels ("Llamadas", "Herramientas", "Navegador"), folder tiles ("Ajustes"), update status indicators ("Al día"), search placeholders, and folder overlay hints.
• Widgets & Overlays: Localized widget picker overlay ("Añadir widget"), custom widget titles, and sub-menus (World Clock, Welcome Overlay, Ambient Audio, Sunrise Light).

4. Verification & Unit Tests

• Passes all unit tests: ./gradlew :app:testDebugUnitTest (BUILD SUCCESSFUL).
• Added unit tests for Google album key and continuation token extraction in RemoteAlbumTest.kt.
• Verified debug build on physical Meta Portal Go hardware (./gradlew :app:assembleDebug).

[starbrightlab]

Thanks for the big contribution here. After a full review I'd like to restructure how this lands, because it currently bundles three separable things (Google Photos fix + Spanish i18n, with #165/#166 stacked on top).

Plan:

1. Google Photos fix → taken separately. The 8a31dec commit that closes #155 is being merged on its own via #168 (your authorship preserved), decoupled from the i18n so it can ship immediately. Once #168 lands, a rebase here will drop 8a31dec automatically (same patch already in main), leaving this PR as i18n-only.

2. Spanish i18n — accepted in principle, and the architecture is safe (English strings.xml untouched, translate() degrades to English, language field has an EnumSpec so the tripwire stays green). One change required before merge:

   • English regression: SettingsDomains.kt:238 lowercased the fit toggle to "fill"/"fit". Since I18n.translate returns English verbatim, English users now see lowercase "fill"/"fit" on the fit control and in the fleet/remote JSON. Please restore "Fill"/"Fit" (and key the ES dict on the capitalized strings, or add "fill"->"Fill" to the English path).
   • Nit: call sites use the fully-qualified com.immortal.launcher.i18n.I18n.translate(...) everywhere — an import alias / top-level tr would cut a lot of diff noise.

So: rebase onto main after #168 merges, fix the fill/fit labels, and this becomes a clean i18n-only PR I can take. Really appreciate the localization work.