Extend https://github.com/go-gitea/gitea/pull/21432 to commit messages.
Color is changed because the markup code block bg does not offer enough
contrast on varying backgrounds.

<img width="568" alt="Screenshot 2024-03-27 at 19 52 55"
src="https://github.com/go-gitea/gitea/assets/115237/ddc9307e-f32f-4e97-8b88-91f88ced2a36">
<img width="573" alt="Screenshot 2024-03-27 at 19 53 33"
src="https://github.com/go-gitea/gitea/assets/115237/14b30fd2-bf28-46b8-9e82-eb60a28f6bf2">
<img width="422" alt="Screenshot 2024-03-27 at 19 53 01"
src="https://github.com/go-gitea/gitea/assets/115237/a12136b5-c02b-460c-9830-f830542987ae">
<img width="397" alt="Screenshot 2024-03-27 at 19 53 27"
src="https://github.com/go-gitea/gitea/assets/115237/c9f05d81-c73e-468e-98e9-e5929bc0da3e">
<img width="333" alt="Screenshot 2024-03-27 at 19 53 07"
src="https://github.com/go-gitea/gitea/assets/115237/06b5a9f9-f95d-46b6-8c57-df0b02555652">
<img width="279" alt="Screenshot 2024-03-27 at 19 53 21"
src="https://github.com/go-gitea/gitea/assets/115237/b06a0afc-ddd8-48ae-b557-a6dc47802e68">

Enable us to use tailwind's
[`font-family`](https://tailwindcss.com/docs/font-family) classes as
well as remove `gt-mono` in favor of `tw-font-mono`. I also merged the
"compensation" to one selector, previously this was two different values
0.9em and 0.95em. I did not declare a `serif` font because I don't think
there will ever be a use case for those. Command ran:

```sh
perl -p -i -e 's#gt-mono#tw-font-mono#g' web_src/js/**/* templates/**/*

Of note is the CSS has references to "floating label" and "transparent
label" but I could not find those anywhere in the code. They are related
to https://github.com/go-gitea/gitea/pull/3939, but I think these have
long been removed.

---------

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Giteabot <teabot@gitea.io>

Big CSS module. I tested basic functionality on admin and commits table.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

Another CSS-only module. Also, I re-ordered the imports based on
[original fomantic
order](https://github.com/fomantic/Fomantic-UI/blob/2.8.7/src/semantic.less).

Small CSS module. There was a ordering conflict between `.ui.menu` and
`.ui.container` which I've solved by adding the `.ui.menu` rule into
base.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

Likely still a few useless classes left, but I think I at least don't
have missed any.

---------

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Giteabot <teabot@gitea.io>

1. Restore missing styles for message close icon
2. Move `code-line-button` so that it does not go off-screen on small
viewports
3. Make `code-line-button` look and behave like other buttons
4. Make `code-line-button` work in blame
5. Make the active selection span the whole line, not just the code part
6. Tweak colors, make dark theme code bg darker, make line numbers same
color in diff and file view.
7. Move code background to parent, fixing border radius and other
problems
8. Enable code wrap in blame
9. Improve blame responsiveness
10. Remove `--color-code-sidebar-bg` in blame, now it uses same
background as code
11. Rename `--color-active-line` to `--color-highlight-bg`
12. Add `--color-highlight-bg`
13. Fix button group borders on hover and border-right on last button.

<img width="1343" alt="Screenshot 2024-03-23 at 22 34 13"
src="https://github.com/go-gitea/gitea/assets/115237/fcbb919f-5dc3-43f0-97f6-870d6f412554">
<img width="1334" alt="Screenshot 2024-03-23 at 22 34 26"
src="https://github.com/go-gitea/gitea/assets/115237/ca44c3b7-4328-4645-ba49-b0dc6a5ac06d">

<img width="1338" alt="Screenshot 2024-03-23 at 22 34 57"
src="https://github.com/go-gitea/gitea/assets/115237/00eb0b5a-1ec7-4669-a94a-4602b9d1c1ac">
<img width="1337" alt="Screenshot 2024-03-23 at 22 34 42"
src="https://github.com/go-gitea/gitea/assets/115237/752edc4a-064f-413c-9dff-c086187fcd85">

Fixes: https://github.com/go-gitea/gitea/issues/18074

Fixes: https://github.com/go-gitea/gitea/issues/29981. Introduce
`.secondary-nav` as a universal way for styling and margin adjustments
inside `.page-content`.

If the first child of `.page-content` is `.secondary-nav`, we add margin
below it, otherwise we add padding to the first child. Notable changes:

- `--color-header-wrapper` is replaced with `--color-secondary-nav-bg`.
- `navbar` class is removed.

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Had to fiddle a bit with the css ordering, but seems to work well now
and should render exactly like before. Some of the CSS may be
unnecessary, but I kept it for now.

1. Use general "mobile-only" and "not-mobile" CSS styles, remove some`@media (max-width: 767.98px)` tricks
2. Use `CountFmt` for repo list, just like the repo header (and it matches GitHub, to avoid big numbers bloat the page)

Various code was using fomantic `loading` class which I think got broken
a while ago and rendered only a full circle. Fix those to use
`is-loading`.

Before:
<img width="295" alt="Screenshot 2024-03-19 at 22 56 26"
src="https://github.com/go-gitea/gitea/assets/115237/dbe83395-5db4-4868-90bc-3613866a35f0">

After:
<img width="60" alt="Screenshot 2024-03-19 at 22 54 35"
src="https://github.com/go-gitea/gitea/assets/115237/8ac19b7e-035a-4c6d-850b-53a234ef69c2">
<img width="294" alt="Screenshot 2024-03-19 at 22 54 56"
src="https://github.com/go-gitea/gitea/assets/115237/34e819d7-25f7-43a1-9d48-4a68dcd2b6ad">
<img width="320" alt="Screenshot 2024-03-19 at 22 55 16"
src="https://github.com/go-gitea/gitea/assets/115237/05127544-47ff-4e18-9fd8-c84e44c374f8">
<img width="153" alt="Screenshot 2024-03-19 at 23 01 43"
src="https://github.com/go-gitea/gitea/assets/115237/a33248c6-b11d-40ff-82d8-f5a3d85b55aa">
<img width="1300" alt="Screenshot 2024-03-19 at 23 56 25"
src="https://github.com/go-gitea/gitea/assets/115237/562ca876-b5d5-4295-961e-9d2cdab31ab0">
<img width="136" alt="Screenshot 2024-03-20 at 00 00 38"
src="https://github.com/go-gitea/gitea/assets/115237/44838ac4-67f3-4fec-a8e3-978cc5dbdb72">

Two small CSS fixes:

1. Add background and reduced padding/avatar size to dashboard navbar.
We use that background already in a number of "secondary navbars", so it
fits.

<img width="1344" alt="Screenshot 2024-03-20 at 18 18 21"
src="https://github.com/go-gitea/gitea/assets/115237/ce5ebedc-e607-42c7-b7b4-b7a4c0ee68f2">

2. Fix padding on top of user settings and subscriptions, regressed by
https://github.com/go-gitea/gitea/pull/29922.

There is a small layout shift in when active tab changes. Notice how the
actions SVG is unstable:


![](https://github.com/go-gitea/gitea/assets/115237/a6928e89-5d47-4a91-8f36-1fa22fddbce7)

This is because the active item with bold text is wider then the
inactive one. I have applied [this
trick](https://stackoverflow.com/a/32570813/808699) to prevent this
layout shift. It's only active inside `<overflow-menu>` because I wanted
to avoid changing HTML and doing it in regular JS would cause a flicker.
I don't expect us to introduce other similar menus without
`<overflow-menu>`, so that place is likely fine.


![after](https://github.com/go-gitea/gitea/assets/115237/d6089924-8de6-4ee0-8db4-15f16069a131)

I also changed the weight from 500 to 600, slightly reduced horizontal
padding, merged some tab-bar related CSS rules and a added a small
margin below repo-header so it does not look so crammed against the
buttons on top.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

The negative margin was suboptimal and presents a few unnecessary
challenges while styling the page. Remove it and add custom margin
values, which slightly changes the height a few things near the top of
the page as well:

15px less height of explore and login navbar:

<img width="899" alt="Screenshot 2024-03-20 at 00 52 34"
src="https://github.com/go-gitea/gitea/assets/115237/72a01ca4-5d17-4a0f-b915-61f95054fcb1">

15px reduced padding-top height of "user bar" and equal 4px padding
added:

<img width="484" alt="Screenshot 2024-03-20 at 00 52 50"
src="https://github.com/go-gitea/gitea/assets/115237/a8507e6d-372d-4a8b-9048-66fcf8a5facd">

3px less padding on top of repo:

<img width="552" alt="Screenshot 2024-03-20 at 00 53 49"
src="https://github.com/go-gitea/gitea/assets/115237/dede6e44-7688-440f-a1b6-13532638ae03">

Before:

<img width="449" alt="Screenshot 2024-03-18 at 22 35 10"
src="https://github.com/go-gitea/gitea/assets/115237/f2893870-e7a3-4e34-b0cf-4610735c9b36">

After:

<img width="453" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/36a9f800-28a4-40fc-b6d2-a2e717ddba01">

Remove this CSS-only module, which gives a nice reduction in CSS size.
Should look exactly like before.

Extract from https://github.com/go-gitea/gitea/pull/29344. With this
class it's possible to have links that don't color on hover. It will be
useful for https://github.com/go-gitea/gitea/pull/29429.

* Remove some deadcode
* Use 2-word name for CSS class names
* Remove "gt-*" rules for sanitizer

The UI doesn't change much.

1. Introduce a special "flex-items-block" for menu items, to align the
dropdown menu items
2. Simplify the "repo search" form
3. Add missing "TopicOnly" search option

Screenshots:

The old UI items don't align:

<details>

![image](https://github.com/go-gitea/gitea/assets/2114189/b965ac00-bad6-4d2f-9103-8841bd940aa5)

</details>


New UI (doesn't change much, but the items align)

<details>

![image](https://github.com/go-gitea/gitea/assets/2114189/a1add892-21dc-423b-90d5-5569faa3dced)


![image](https://github.com/go-gitea/gitea/assets/2114189/fb4040b2-96d8-4fb2-a0ed-760b9881fd86)

</details>

---------

Co-authored-by: silverwind <me@silverwind.io>

Fixes https://github.com/go-gitea/gitea/issues/29652. Removes all
scrollbar customization as per popular vote on
https://github.com/go-gitea/gitea/issues/29652#issuecomment-1985846162.

There is one more case of `-webkit-scrollbar` left in CSS and
https://github.com/go-gitea/gitea/pull/29400 will get rid of that as
well.

1. Add `<overflow-menu>` web component
2. Rename `<gitea-origin-url>` to `<origin-url>` and make filenames
match.

<img width="439" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/2fbe4ca4-110b-4ad2-8e17-c1e116ccbd74">

<img width="444" alt="Screenshot 2024-03-02 at 21 36 52"
src="https://github.com/go-gitea/gitea/assets/115237/aa8f786e-dc8c-4030-b12d-7cfb74bdfd6e">

<img width="537" alt="Screenshot 2024-03-03 at 03 05 06"
src="https://github.com/go-gitea/gitea/assets/115237/fddd50aa-adf1-4b4b-bd7f-caf30c7b2245">


![image](https://github.com/go-gitea/gitea/assets/115237/0f43770c-834c-4a05-8e3d-d30eb8653786)


![image](https://github.com/go-gitea/gitea/assets/115237/4b4c6bd7-843f-4f49-808f-6b3aed5e9f9a)

TODO:

- [x] Check if removal of `requestAnimationFrame` is possible to avoid
flash of content. Likely needs a `MutationObserver`.
- [x] Hide tippy when button is removed from DOM.
- [x] ~~Implement right-aligned items
(https://github.com/go-gitea/gitea/pull/28976)~~. Not going to do it.
- [x] Clean up CSS so base element has no background and add background
via tailwind instead.
- [x] Use it for org and user page.

---------

Co-authored-by: Giteabot <teabot@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Unify all but a few search boxes to use uniform style, uniform
translations and shared templates where possible.
Remove a few duplicated search templates, e. g. code search.

<details><summary>Example after screenshots:</summary>


![grafik](https://github.com/go-gitea/gitea/assets/47871822/e20e7d6b-c6be-4a47-b132-672766f41421)


![grafik](https://github.com/go-gitea/gitea/assets/47871822/d5b11b9c-c12f-4a29-8fb0-24e5aa511d18)


![grafik](https://github.com/go-gitea/gitea/assets/47871822/d86bb444-36c7-426d-9cf1-c634963dffb1)


![grafik](https://github.com/go-gitea/gitea/assets/47871822/a76c0319-0518-484a-a840-563d02b61198)

</details>


Also includes #29700 

Co-authored-by: 6543 <6543@obermui.de>

---------

Co-authored-by: 6543 <m.huber@kithara.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>

Previously it was only partially styled, e.g. there was black text on
white background even in dark theme caused by fomantic styles.

<img width="195" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/bc5cf516-2aef-45c3-854a-c9f5497aacca">

<img width="195" alt="Screenshot 2024-03-09 at 02 09 29"
src="https://github.com/go-gitea/gitea/assets/115237/ef0af17d-6e0b-402e-b24d-bfa34dc2f4e0">

Co-authored-by: Giteabot <teabot@gitea.io>

Fomantic grey labels in the dashboard repo lists were showing original
fomantic colors, fixed that. Also slightly tweaked the light theme
colors so it uses same opacity values as dark theme.

<img width="165" alt="Screenshot 2024-03-07 at 21 06 23"
src="https://github.com/go-gitea/gitea/assets/115237/72744d6f-2ee1-4e5d-8ba0-b482a446f535">
<img width="167" alt="Screenshot 2024-03-07 at 21 06 00"
src="https://github.com/go-gitea/gitea/assets/115237/1ba93775-e5a9-4b28-b90f-59c1e9199687">

Before, double border on top, bad contrast on dark:
<img width="155" alt="Screenshot 2024-02-29 at 02 06 17"
src="https://github.com/go-gitea/gitea/assets/115237/fc0f1e08-a5ce-47ed-9eb6-135eed5a1abb">
<img width="126" alt="Screenshot 2024-02-29 at 02 07 28"
src="https://github.com/go-gitea/gitea/assets/115237/38ae8483-8d9b-484c-8909-d4466131ea16">

After, no double border on top, good contrast:
<img width="154" alt="Screenshot 2024-02-29 at 02 20 20"
src="https://github.com/go-gitea/gitea/assets/115237/ad91282b-e9f5-4f41-8f5e-6ba28db3beac">
<img width="147" alt="Screenshot 2024-02-29 at 02 20 38"
src="https://github.com/go-gitea/gitea/assets/115237/7ee2ec92-e72a-4981-aec3-98fc8e579bae">

This will get tailwindcss working on a basic level. It provides only the
utility classes, e.g. no tailwind base which we don't need because we
have our own CSS reset. Without the base, we also do not have their CSS
variables so a small amount of features do not work and I removed the
generated classes for them.

***Note for future developers: This currently uses a `tw-` prefix, so we
use it like `tw-p-3`.***

<details>
<summary>Currently added CSS, all false-positives</summary>

```
.\!visible{

    visibility: visible !important
}

.visible{

    visibility: visible
}

.invisible{

    visibility: hidden
}

.collapse{

    visibility: collapse
}

.static{

    position: static
}

.\!fixed{

    position: fixed !important
}

.absolute{

    position: absolute
}

.relative{

    position: relative
}

.sticky{

    position: sticky
}

.left-10{

    left: 2.5rem
}

.isolate{

    isolation: isolate
}

.float-right{

    float: right
}

.float-left{

    float: left
}

.mr-2{

    margin-right: 0.5rem
}

.mr-3{

    margin-right: 0.75rem
}

.\!block{

    display: block !important
}

.block{

    display: block
}

.inline-block{

    display: inline-block
}

.inline{

    display: inline
}

.flex{

    display: flex
}

.inline-flex{

    display: inline-flex
}

.\!table{

    display: table !important
}

.inline-table{

    display: inline-table
}

.table-caption{

    display: table-caption
}

.table-cell{

    display: table-cell
}

.table-column{

    display: table-column
}

.table-column-group{

    display: table-column-group
}

.table-footer-group{

    display: table-footer-group
}

.table-header-group{

    display: table-header-group
}

.table-row-group{

    display: table-row-group
}

.table-row{

    display: table-row
}

.flow-root{

    display: flow-root
}

.inline-grid{

    display: inline-grid
}

.contents{

    display: contents
}

.list-item{

    display: list-item
}

.\!hidden{

    display: none !important
}

.hidden{

    display: none
}

.flex-shrink{

    flex-shrink: 1
}

.shrink{

    flex-shrink: 1
}

.flex-grow{

    flex-grow: 1
}

.grow{

    flex-grow: 1
}

.border-collapse{

    border-collapse: collapse
}

.select-all{

    user-select: all
}

.resize{

    resize: both
}

.flex-wrap{

    flex-wrap: wrap
}

.overflow-visible{

    overflow: visible
}

.rounded{

    border-radius: 0.25rem
}

.border{

    border-width: 1px
}

.text-justify{

    text-align: justify
}

.uppercase{

    text-transform: uppercase
}

.lowercase{

    text-transform: lowercase
}

.capitalize{

    text-transform: capitalize
}

.italic{

    font-style: italic
}

.text-red{

    color: var(--color-red)
}

.text-shadow{

    color: var(--color-shadow)
}

.underline{

    text-decoration-line: underline
}

.overline{

    text-decoration-line: overline
}

.line-through{

    text-decoration-line: line-through
}

.outline{

    outline-style: solid
}

.ease-in{

    transition-timing-function: cubic-bezier(0.4, 0, 1, 1)
}

.ease-in-out{

    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1)
}

.ease-out{

    transition-timing-function: cubic-bezier(0, 0, 0.2, 1)
}
```

</details>

---------

Co-authored-by: Giteabot <teabot@gitea.io>

1. Tweak diff header and remove a numbe of unneeded CSS for it:

Before:
<img width="433" alt="Screenshot 2024-02-18 at 01 08 09"
src="https://github.com/go-gitea/gitea/assets/115237/d8b377c0-57bc-44d5-bb57-a582c7d4b3b4">

After:
<img width="463" alt="Screenshot 2024-02-18 at 01 07 56"
src="https://github.com/go-gitea/gitea/assets/115237/d08c17e7-5b86-4d07-81da-6371f4754325">

3. Reduce height of review textarea and also reduce fomantic's CSS from
12em to 8em. Now fits better on my screen:

<img width="1352" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/5c658d13-295e-4929-94da-13ade888020d">

---------

Co-authored-by: delvh <dev.lh@web.de>

It's now possible to change webhook-type in create-view.

before:

![image](https://github.com/go-gitea/gitea/assets/72873130/9ee1b9fb-843b-4f28-b8d6-6361e5d184f1)

after:

![image](https://github.com/go-gitea/gitea/assets/72873130/9dbf058f-5912-43af-9acd-487271212f2d)

---------

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>

- Follows https://github.com/go-gitea/gitea/pull/21711
- Closes https://github.com/go-gitea/gitea/issues/28316

Implement GitHub's alert blocks markdown feature

Docs:
-
https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts
- https://github.com/orgs/community/discussions/16925

### Before

![image](https://github.com/go-gitea/gitea/assets/20454870/14f7b02a-5de5-4fd0-8437-a055dadb31f2)

### After

![image](https://github.com/go-gitea/gitea/assets/20454870/ed06a869-e545-42f1-bf25-4ba20b1be196)

## :warning: BREAKING :warning:

The old syntax no longer works

How to migrate:

If you used
```md
> **Note** My note
```

Switch to
```md
> [!NOTE]
> My note
```

---------

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>

I tripped over this strange method and I don't think we need that
workaround to fix the value.

old:

![grafik](https://github.com/go-gitea/gitea/assets/1666336/c8b6797b-eb45-4dec-99db-1b0649a34ec5)

new:

![grafik](https://github.com/go-gitea/gitea/assets/1666336/ab1a65ae-de5b-4ce4-9813-3b8b39c7922e)

---------

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

Before:

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/c82f8615-04d4-408f-95bf-689c227a8814)



![image](https://github.com/go-gitea/gitea/assets/2114189/d01d05a7-09ca-48f3-a0e7-fec48119b426)

</details>

After:



![image](https://github.com/go-gitea/gitea/assets/2114189/e560398e-2fa4-4f46-9229-f6acc70e32ab)


![image](https://github.com/go-gitea/gitea/assets/2114189/bd18961d-0636-4584-b893-c465daaf40af)

Redesign repo header with following new aspects:
- responsive & better-looking repo title
- hide repo button text instead of icons in mobile view
- use same tab style as on explore and org page

<details>
<summary>Before:</summary>


![grafik](https://github.com/go-gitea/gitea/assets/47871822/57360b77-d43c-49ac-b798-2363c03da7ec)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/d4117f79-a5f5-4f36-bf65-bbada3e7e73b)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/e26f967f-e264-4337-9925-3d942e04fd6d)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/b4683c8d-9c6a-4089-afa7-8dd219e43a46)


</details>

<details>
<summary>After:</summary>


![grafik](https://github.com/go-gitea/gitea/assets/47871822/8ddbc9f6-53c7-4e4e-bea9-704fd93524ca)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/c0588aa9-788d-469c-98a0-81484fbd220c)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/206e931e-404d-4d1b-92ce-908698addfcc)

![grafik](https://github.com/go-gitea/gitea/assets/47871822/a508f9c8-fadc-4a85-94ba-18796f77e07b)

Fix #24318

Before:

![image](https://github.com/go-gitea/gitea/assets/18380374/38282e5e-0b4d-4568-a853-59352798e826)

![image](https://github.com/go-gitea/gitea/assets/18380374/79d89ee6-61f6-45a7-af0b-d1c23fead25a)

![image](https://github.com/go-gitea/gitea/assets/18380374/39b45fae-52e2-4697-b83a-7cd10f76ac43)

After:

![image](https://github.com/go-gitea/gitea/assets/18380374/09e8cfcf-0150-494e-9f63-0868f529da65)

![image](https://github.com/go-gitea/gitea/assets/18380374/d2c348d3-fe03-466a-a5f4-878b7a93a318)

![image](https://github.com/go-gitea/gitea/assets/18380374/7f75b807-300c-42d5-b2c3-bae9e45e3c08)

![image](https://github.com/go-gitea/gitea/assets/18380374/06eca901-f5cf-4100-bb65-92457ad106e3)

1. fix #27631 , and add samples to devtest page
2. fix incorrect color for "ui dropdown button" when hover

Enable [shorthand
matching](https://github.com/AndyOGo/stylelint-declaration-strict-value#expandshorthand)
in this lint rule and match color properties by regex. Patterns like
this will now fail lint:

```css
background: #123456;
border: 1px sold rgba(0,0,0,0);
```

Part of https://github.com/go-gitea/gitea/issues/27097:

- `gitea` theme is renamed to `gitea-light`
- `arc-green` theme is renamed to `gitea-dark`
- `auto` theme is renamed to `gitea-auto`

I put both themes in separate CSS files, removing all colors from the
base CSS. Existing users will be migrated to the new theme names. The
dark theme recolor will follow in a separate PR.

## :warning: BREAKING :warning:

1. If there are existing custom themes with the names `gitea-light` or
`gitea-dark`, rename them before this upgrade and update the `theme`
column in the `user` table for each affected user.
2. The theme in `<html>` has moved from `class="theme-name"` to
`data-theme="name"`, existing customizations that depend on should be
updated.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

Fixes #3852
Fixes https://github.com/go-gitea/gitea/issues/26707

Add a button on file history which directs you to the file at the
selected commit.

Co-authored-by: silverwind <me@silverwind.io>

1. Put the `"octicon-shield-lock"` into the flex container, then it
doesn't need a separate flex box
2. Remove some unnecessary `gt-df` helpers
3. Make `btn` button has the same flex behavior as `ui button`


![image](https://github.com/go-gitea/gitea/assets/2114189/60ce75f7-7fac-4157-9c42-91c7dee9300e)



![image](https://github.com/go-gitea/gitea/assets/2114189/ea606baf-6f52-41e1-b964-c4840d3b1529)

The `.new-menu` was using a pseudo-element based fade-out effect.
Replace this with a more modern mask-based effect which in this case
required a child element to avoid fading out the background as well, so
I applied it to child `new-menu-inner` which was present on all these
menus except explore where I added it.

There is no visual difference except that the items on the explore page
have no `gap` between them any longer, making it consistent with other
menus. Before and after:

<img width="221" alt="Screenshot 2023-09-21 at 21 13 19"
src="https://github.com/go-gitea/gitea/assets/115237/b4a38ce2-cee1-4c54-84a5-e1d0bfd79e29">
<img width="222" alt="Screenshot 2023-09-21 at 21 32 36"
src="https://github.com/go-gitea/gitea/assets/115237/bb6b1335-d935-4ad4-bb85-3b0fc3027c2b">

Also, this cleans up the related CSS vars:

- `--color-header-wrapper-transparent` is removed, no longer needed
- `--color-header-wrapper` is defined in base theme as well, was
previously unset and therefor transparent.

[no whitespace
diff](https://github.com/go-gitea/gitea/pull/27181/files?diff=unified&w=1)
[demo of mask fade](https://jsfiddle.net/silverwind/tsfadb3u/)

Fix #27166

Follow up https://github.com/go-gitea/gitea/pull/26741

Changes:
Added archived label for org labels and added into issue filter list.


Part of https://github.com/go-gitea/gitea/issues/25237

---------

Signed-off-by: puni9869 <punitinani1@hotmail.com>
Co-authored-by: silverwind <me@silverwind.io>

Before:

![before](https://github.com/go-gitea/gitea/assets/3371163/bc5a3b20-3490-4e14-ab1d-2fcfbc4a2e20)

After:

![after](https://github.com/go-gitea/gitea/assets/3371163/70e8be6a-11a2-46af-9e1e-78ac153cd2a4)

---  

1. **Remove the scroll bar exception that in the a tag**  
2. **Reduce the actual width of the a tag to the actual width of the
content**

![c363a5b588](https://github.com/go-gitea/gitea/assets/3371163/789d9b83-ad14-46d2-8a1b-df551a063f6a)
As shown in the screenshot, the red box area should not be clickable

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>

Replace  #26850

Major changes:

1. Remove all `has` selectors, it is still not supported by firefox.
Actually there could be some more general and clearer approaches
2. Remove `two-toggle-buttons`, the `.ui.buttons` just works well
3. Rewrite the `.ui.buttons` border styles, see the screenshots
4. Remove the "fine-tuning" paddings from the the flex children, they
could layout themselves well.

![image](https://github.com/go-gitea/gitea/assets/2114189/a32ed6f3-60f7-43d5-9492-62c45d2397f6)

![image](https://github.com/go-gitea/gitea/assets/2114189/5cb173c5-c942-4237-8cb4-2697220b3f06)

![image](https://github.com/go-gitea/gitea/assets/2114189/8a1c12b3-a632-48ff-b1a7-a01a4417f821)

![image](https://github.com/go-gitea/gitea/assets/2114189/46bde1bd-9113-4231-965d-6ec9076f6a3b)

The old code used complex `if` blocks and strange HTML layouts.

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/7fbee2b8-d150-4e6b-b67e-83400fa290eb)

</details>

This PR refactors the template code and remove legacy CSS styles. The UI
doesn't change much.



![image](https://github.com/go-gitea/gitea/assets/2114189/3e195df9-0ab5-4182-bcb2-bb20cad823f2)


![image](https://github.com/go-gitea/gitea/assets/2114189/f707a49f-be41-4dfe-871f-2869f2230380)

---
*Sponsored by Kithara Software GmbH*

1. `icons`: globally searched, no use in templates.
2. toast's `display: inline-block;`: there is a `display: flex` below.

1. Use `gt-invisible` instead of `invisible`.
2. Use `gt-word-break` instead of `dont-break-out` (there is a slight
different "hyphens", but I think it won't affect too much since it is
only used for the "full name").
3. Remove `.small.button:has(svg)` , now our buttons could layout SVG
correctly, and actually I didn't see this CSS class is used in code.