Feature/lightbox

[ryuash]

Description

closes #135 bad preview but i push a new screen to make a lightbox

Checklist

• [x] Targeted PR against correct branch.
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [x] Wrote unit tests.
• [x] Run flutter format.
• [x] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [ ] Re-reviewed Files changed in the Github PR explorer.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@d417d78). Click here to learn what that means. The diff coverage is 51.51%.

@@            Coverage Diff            @@
##             master     #157   +/-   ##
=========================================
  Coverage          ?   63.71%           
=========================================
  Files             ?      278           
  Lines             ?     7226           
  Branches          ?        0           
=========================================
  Hits              ?     4604           
  Misses            ?     2622           
  Partials          ?        0           

Impacted Files	Coverage Δ
lib/ui/blocs/navigator/navigator_bloc.dart	1.86% <0.00%> (ø)
lib/ui/blocs/navigator/navigator_event.dart	37.50% <0.00%> (ø)
..._info_editor/widgets/account_text_input/index.dart	100.00% <ø> (ø)
lib/ui/widgets/post_content_image_item/index.dart	0.00% <0.00%> (ø)
lib/ui/widgets/post_images_previewer/index.dart	15.78% <0.00%> (ø)
lib/ui/screens/lightbox_screen/index.dart	73.91% <73.91%> (ø)
...ities/notifications/transaction_notifications.dart	92.30% <0.00%> (ø)
...creen/widgets/post_details_main_content/index.dart	100.00% <0.00%> (ø)
lib/ui/theme/fonts.dart	0.00% <0.00%> (ø)
lib/ui/screens/splash_screen/index.dart	88.88% <0.00%> (ø)
... and 274 more

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