[Feature] Enhancement: Add Extra Zoom-Out Level for Better Navigation in Large Photo Libraries

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Description As personal photo libraries grow year after year, navigating through large timelines becomes increasingly difficult — even with the current "pinch-to-zoom" functionality provided in Immich's mobile app. Currently, even at the most zoomed-out level, the vertical scroll bar is too sensitive and compressed: moving it by just 1 mm can skip several months of photos, especially on devices with large libraries. This makes precise navigation challenging. Proposal / Feature Suggestion Introduce an additional zoom-out level beyond the current minimum zoom, allowing the user to: 1. See significantly more photos at once — possibly by displaying ultra-small thumbnails. 2. Navigate the photo timeline more efficiently, even across multiple years. 3. Conceptually allow a zoom hierarchy: * Zoomed out (Year view):…