viewer: migrate to vue 3, general refactoring and cleanup

Non-exhaustive list of fixes and improvements done at the same time:

- html default background to grey (avoids white flash during init)
- unified links behavior
- added more theme variables
- removed the flex-expand transition (it wasn't working) and replaced it
  with a slide
- fixed LdLoading not centered on the content
- title on removable tags
- fixed an issue with encoded URI from vue-router
- unified Item resource URLs
- removed the iframe for PlainTextViewer (it wasn't working properly)
  and replaced it with a pre
- fixed clear and search buttons tabindex
- fixed the information panel bumping up during the fade animation of
  tag's dropdown
- fixed some focus outlines not appearing correctly
- moved CSS variables to the :root context
- Code cleaning

GitHub: closes #217
GitHub: closes #300
GitHub: closes #297
GitHub: closes #105
GitHub: closes #267
GitHub: closes #275
GitHub: closes #228
GitHub: closes #215
GitHub: closes #112

1 files changed, 0 insertions, 31 deletions

diff --git a/viewer/src/assets/scss/palette.scss b/viewer/src/assets/scss/palette.scss
deleted file mode 100644
index e70e8a1..0000000
--- a/viewer/src/assets/scss/palette.scss
+++ /dev/null
@@ -1,31 +0,0 @@
-/* ldgallery - A static generator which turns a collection of tagged
---             pictures into a searchable web gallery.
---
--- Copyright (C) 2020       Pacien TRAN-GIRARD
---
--- This program is free software: you can redistribute it and/or modify
--- it under the terms of the GNU Affero General Public License as
--- published by the Free Software Foundation, either version 3 of the
--- License, or (at your option) any later version.
---
--- This program is distributed in the hope that it will be useful,
--- but WITHOUT ANY WARRANTY; without even the implied warranty of
--- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--- GNU Affero General Public License for more details.
---
--- You should have received a copy of the GNU Affero General Public License
--- along with this program.  If not, see <https://www.gnu.org/licenses/>.
-*/
-
-// Material Design Blue Gray colour palette
-$palette-000: #ffffff;
-$palette-050: #eceff1;
-$palette-100: #cfd8dc;
-$palette-200: #b0bec5;
-$palette-300: #90a4ae;
-$palette-400: #78909c;
-$palette-500: #607d8b;
-$palette-600: #546e7a;
-$palette-700: #455a64;
-$palette-800: #37474f;
-$palette-900: #263238;