feat: blocks widget v61 + OS widget

[jvsena42]

FIGMA

1. Adds a Glance-backed Bitcoin Blocks home screen widget with Wide and Compact layouts
2. Migrates BlockCard, BlocksEditScreen, and BlocksPreviewScreen to the v61 design
3. Caps the compact layout at 4 fields; the wide layout supports all 7
4. Wires Blocks preferences through the shared AppWidgetConfigActivity / preferences store / refresh worker
5. Splits per-widget config screens into their own files so AppWidgetConfigScreen stays a thin dispatcher

Description

Adds BlocksGlanceWidget (registered via BlocksGlanceReceiver) using SizeMode.Exact with a LazyColumn-backed Wide layout (icon + label + value rows, scrollable) and a 4-row Compact layout (icon + value), reusing GlanceWidgetScaffold, the Brand-tinted icon set, and tap-to-edit. The shared config flow is extended with a BlocksPreferences/HomeBlocksPreferences pair, seven toggle actions, and a DATA section; save warms the cache via a new AppWidgetDataRepository.fetchBlock() and AppWidgetRefreshWorker now refreshes Blocks alongside Price and Headlines.

In-app, BlockCard is split into wide and compact variants and BlocksPreviewScreen is rebuilt to mirror the price/headlines preview (top-bar title, description, divider, Widget Settings row, WidgetSizeCarousel, Save / Delete). BlocksEditScreen is restructured into a DATA section with Caption13Up headers and toggle rows. Manifest, appwidget_info_blocks.xml, and a static appwidget_preview_blocks.xml register the new provider with a 4x2 default placement.

Preview

os-widget.webm

in-app-widget.webm

QA Notes

System widget

1. Long-press home → Widgets → "Bitcoin Blocks" — picker preview shows the 4-row wide layout with Brand-tinted icons.
2. Drop at default 4x2 — lands on Wide with Block / Time / Date / Transactions visible.
3. Open config — title is "Bitcoin Blocks", DATA section lists all 7 fields, toggle them all on and Save.
4. Scroll inside the widget at 4x2 — all 7 enabled rows reachable via scroll.
5. Resize down to 2x2 — switches to Compact (icon + value, no labels), shows only the first 4 enabled rows.
6. Tap the widget — AppWidgetConfigActivity reopens with previously-saved toggles preserved.
7. Reset in config and Save — only the 4 default fields render.
8. Add a second Blocks widget with a different toggle set — instances render independently (keyed by appWidgetId).
9. Wait for the periodic refresh — values update against the latest mempool tip.
10. Remove a widget — entry is cleared from appwidget_data.json (adb shell "run-as to.bitkit.dev cat files/datastore/appwidget_data.json").

In-app widget

11. Widgets feed → Bitcoin Blocks — preview screen shows v61 layout; Widget Settings reads "Default" by default and flips to "Custom" once any toggle changes.
12. Swipe the carousel — small and wide cards render correctly; size label flips between Small / Wide.
13. Widget Settings → BlocksEditScreen — rows toggle between Brand and White50; Reset disables at defaults; Preview disables when all toggles are off.
14. Save and return to home — in-app card matches the configured fields.

Code quality

• ./gradlew compileDevDebugKotlin clean
• ./gradlew detekt clean
• ./gradlew testDevDebugUnitTest green