feat: hide in-app compact widget preview

[jvsena42]

Description

This PR hides the compact (small) widget size from the in-app widget preview screens. The small home-screen variant cannot be added yet, so showing it in the size carousel was misleading. Each preview (Blocks, Facts, Headlines, Price, Weather) now defaults to and shows only the wide preview, with the carousel's second page and the page-indicator dots hidden. The compact code is left in place (commented) so it can be re-enabled later, and the "WIDE" label spacing above the action buttons was adjusted to compensate for the removed page indicator.

This mirrors the Android change in synonymdev/bitkit-android#952.

Linked Issues/Tasks

Closes #559

QA Notes

Manual Tests

• 1. Widgets → add widget → open each preview (Blocks, Facts, Headlines, Price, Weather): only the wide card shows, label reads "WIDE", no page-indicator dots, swiping reveals no small variant.
• 2. Any widget preview → spacing between the "WIDE" label and the Save/Delete buttons: comfortable gap, not cramped.
• 3. Any widget preview → tap Save widget: widget saves and appears in the list.

Automated Checks

N/A

Screenshot / Video

Simulator.Screen.Recording.-.iPhone.16.-.2026-05-21.at.09.07.27.mp4