* refactor: Simplify code (#44275)

* Remove dead code

* Remove values same as default options

* Simplify hook API: Removing unused argument

* review: Remove redundant code

* Update look and feel copy (#44277)

* Update static embed tab name

* Update copies + rearrange settings

* Use Mantine Select

* Fix E2E tests by applying new copies

* Fix unit tests

* Fix more E2E tests

* review: Add a comment on Mantine `value` quirk

* Adjust spacing and relevant tests

* Move `transparent` theme to its own toggle option (#44362)

* Reorder the function to match the visual order

* Make function name consistent

* Introduce the new background option (do nothing yet)

* Remove redundant exports

* Tighten up values to reduce confusion

* Make the parameters order consistent

* Only show background option on dashboads (spec)

* Allow dashboard embed background to be transparent

* Make filter background and header/footer transparent

* Fix type error

* Fix unit tests

* Fix E2E tests

* Fix checkerboard pattern not showing when no background

* Add unit tests

* Add missing copy update

* Remove remnants from outdated solutions within the PR

* Improve code comment references

* Fix E2E tests since the last copy change

* Fix type errors from merging master

* Update light theme style (#44488)

* Add background to dashboard filter on light theme

* Make position sticky works with transparent background

* Fix sticky filters not working on theme=transparent

* Fix unit tests

* Simplify IntersectionObserver components + fix E2E tests

* Add storybook for embedded dashboard

* Clarify the use of ExplicitSize context

* Remove unused code

* Formatting

* Review: Better mock `isWithinIframe`

* Update dark theme to match the new design (#45134)

* Update light theme checkerboard colors

* Update checkerboard colors

* Consolidate dashboard light/dark border style

* Use `--mb-color-text-primary` for light theme dashboard

* Update embed dashboard dark theme primary color

* Migrate dashboard text-secondary color

* Migrate text-tertiary color

* Migrate gold, axis, and split line to CSS custom properties

* Fix failed e2e tests

* Fix static viz not working

* Update loki snapshots

* Remove unnecessary CSS custom property

* Make diff more consistent

* Address review: reusing type

* Support backward compatibility when passing `theme=transparent` (#45214)

* Match preview query with the actual code query

* Handle backward compatibility when `theme=transparent` on dashboard

* Add unit tests

* Address review: Make tests less repetitive

* Update Metabase banner upsell UI (#45424)

* Prepare folder for nested components

* Update upsell UI

- add `fullWidth` variant
- align title to the left

* Fix Upsell banner having horizontal scroll on full width

* Add new Metabase banner upsell component

* Fix unit tests

* Address review: Fix typo

Co-authored-by: Ryan Laurie <30528226+iethree@users.noreply.github.com>

* Address review: Move upsel UI to `admin/upsells`

Co-authored-by: Ryan Laurie <30528226+iethree@users.noreply.github.com>

* Remove unnecessary ESLint disable comment

We can remove it since the file is in admin folder, and is already excluded from the rule.

* Address review: remove default value property

Co-authored-by: Denis Berezin <denis.berezin@metabase.com>

* Address review: Extract magic number

---------

Co-authored-by: Ryan Laurie <30528226+iethree@users.noreply.github.com>
Co-authored-by: Denis Berezin <denis.berezin@metabase.com>

* More UI updates (#45450)

* Update dark theme text colors to match the new design

* Update powered by metabase logo

* Update loki snapshots

* Fix unit tests

* Fix formatting

* Fix wrong dark theme metabase logo badge color

* Address review: Compress SVG with svgo

Co-authored-by: Denis Berezin <denis.berezin@metabase.com>

* Fix E2E tests

* Update loki snapshots

* Clarify Metabase base colors with comments

---------

Co-authored-by: Denis Berezin <denis.berezin@metabase.com>

* Add more tests (#45628)

* Add static embed question stories

* Add loki snapshots

* Add transparent theme for static dashboard tests

* Add transparent theme tests for static questions

* Assert `background` option in analytics tests

* Remove tests for logic that has been moved

* Update loki snapshots

* Fix failed E2E tests from merging master

---------

Co-authored-by: Ryan Laurie <30528226+iethree@users.noreply.github.com>
Co-authored-by: Denis Berezin <denis.berezin@metabase.com>