@keyframes progress-bar-stripes {\n    from { background-position: $progress-height 0; }\n    to { background-position: 0 0; }\n  }\n}\n\n.progress {\n  display: flex;\n  height: $progress-height;\n  overflow: hidden; // force rounded corners by cropping it\n  line-height: 0;\n  @include font-size($progress-font-size);\n  background-color: $progress-bg;\n  @include border-radius($progress-border-radius);\n  @include box-shadow($progress-box-shadow);\n}\n\n.progress-bar {\n  display: flex;\n  flex-direction:...

### Features

* ✨ Show a clear error on attempt to include router into itself. PR [#14258](https://github.com/fastapi/fastapi/pull/14258) by [@JavierSanchezCastro](https://github.com/JavierSanchezCastro).
* ✨ Replace `dict` by `Mapping` on `HTTPException.headers`. PR [#12997](https://github.com/fastapi/fastapi/pull/12997) by [@rijenkii](https://github.com/rijenkii).

### Refactors

@keyframes progress-bar-stripes {\n    from { background-position: $progress-height 0; }\n    to { background-position: 0 0; }\n  }\n}\n\n.progress {\n  display: flex;\n  height: $progress-height;\n  overflow: hidden; // force rounded corners by cropping it\n  line-height: 0;\n  @include font-size($progress-font-size);\n  background-color: $progress-bg;\n  @include border-radius($progress-border-radius);\n  @include box-shadow($progress-box-shadow);\n}\n\n.progress-bar {\n  display: flex;\n  flex-direction:...