warn that RTL support is currently not planned

the current approach to html generation is
probably too jank to handle RTL correctly

CONTRIBUTING.md

@@ -28,6 +28,8 @@ aside from documentation and ideas, some other things that would be cool to have
 
 * **translations** -- the copyparty web-UI has translations for english and norwegian at the top of [browser.js](https://github.com/9001/copyparty/blob/hovudstraum/copyparty/web/browser.js); if you'd like to add a translation for another language then that'd be welcome! and if that language has a grammar that doesn't fit into the way the strings are assembled, then we'll fix that as we go :>
 
+  * but please note that support for [RTL (Right-to-Left) languages](https://en.wikipedia.org/wiki/Right-to-left_script) is currently not planned, since the javascript is a bit too jank for that
+
 * **UI ideas** -- at some point I was thinking of rewriting the UI in react/preact/something-not-vanilla-javascript, but I'll admit the comfiness of not having any build stage combined with raw performance has kinda convinced me otherwise :p but I'd be very open to ideas on how the UI could be improved, or be more intuitive.
 
 * **docker improvements** -- I don't really know what I'm doing when it comes to containers, so I'm sure there's a *huge* room for improvement here, mainly regarding how you're supposed to use the container with kubernetes / docker-compose / any of the other popular ways to do things. At some point I swear I'll start learning about docker so I can pick up clach04's [docker-compose draft](https://github.com/9001/copyparty/issues/38) and learn how that stuff ticks, unless someone beats me to it!

docs/rice/README.md

@@ -61,6 +61,8 @@ if the value starts with `%` it will assume a jinja2 template and expand it; the
 
 add your own translations by using the english or norwegian one from `browser.js` as a template
 
+> ⚠ Please do not contribute translations to [RTL (Right-to-Left) languages](https://en.wikipedia.org/wiki/Right-to-left_script) for now; the javascript is [not ready](https://github.com/9001/copyparty/blob/hovudstraum/docs/rice/rtl.patch) to deal with it
+
 the easy way is to open up and modify `browser.js` in your own installation; depending on how you installed copyparty it might be named `browser.js.gz` instead, in which case just decompress it, restart copyparty, and start editing it anyways
 
 you will be delighted to see inline html in the translation strings; to help prevent syntax errors, there is [a very jank linux script](https://github.com/9001/copyparty/blob/hovudstraum/scripts/tlcheck.sh) which is slightly better than nothing -- just beware the false-positives, so even if it complains it's not necessarily wrong/bad

docs/rice/rtl.patch

@@ -0,0 +1,79 @@
+RTL support is not planned, but it would be
+something like this (just a whole lot more)
+
+diff --git a/copyparty/web/browser.css b/copyparty/web/browser.css
+index e66279d4..2888be56 100644
+--- a/copyparty/web/browser.css
++++ b/copyparty/web/browser.css
+@@ -653,12 +653,10 @@ a:hover {
+ .s0:after,
+ .s1:after {
+ 	content: '⌄';
+-	margin-left: -.15em;
+ }
+ .s0r:after,
+ .s1r:after {
+ 	content: '⌃';
+-	margin-left: -.15em;
+ }
+ .s0:after,
+ .s0r:after {
+@@ -668,6 +666,19 @@ a:hover {
+ .s1r:after {
+ 	color: var(--sort-2);
+ }
++.ltr .s0:after,
++.ltr .s1:after,
++.ltr .s0r:after,
++.ltr .s1r:after {
++	margin-left: -.15em;
++}
++.rtl .s0:after,
++.rtl .s1:after,
++.rtl .s0r:after,
++.rtl .s1r:after {
++	margin-left: -.5em;
++	padding: 0 .25em 0 0;
++}
+ #files thead th:after {
+ 	margin-right: -.5em;
+ }
+diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
+index 33965a70..bf425cc7 100644
+--- a/copyparty/web/browser.js
++++ b/copyparty/web/browser.js
+@@ -1797,9 +1797,13 @@ var Ls = {
+ 
+ 		"lang_set": "刷新以使更改生效？",
+ 	},
++	"foo": {
++		"tt": "Foobar",
++		"rtl": "rtl",
++	},
+ };
+ 
+-var LANGS = ["eng", "nor", "chi"];
++var LANGS = ["eng", "nor", "chi", "foo"];
+ 
+ if (window.langmod)
+ 	langmod();
+@@ -1819,7 +1823,7 @@ for (var a = 0; a < LANGS.length; a++) {
+ 			t2 = Ls[LANGS[i2]];
+ 
+ 		for (var k in t1)
+-			if (!t2[k]) {
++			if (!t2[k] && k != 'rtl') {
+ 				console.log("E missing TL", LANGS[i2], k);
+ 				t2[k] = t1[k];
+ 			}
+@@ -1829,6 +1833,10 @@ for (var a = 0; a < LANGS.length; a++) {
+ if (!has(LANGS, lang))
+ 	alert('unsupported --lang "' + lang + '" specified in server args;\nplease use one of these: ' + LANGS);
+ 
++if (L.rtl)
++	document.documentElement.setAttribute('dir', L.rtl);
++document.documentElement.className = L.rtl || 'ltr';
++
+ modal.load();
+ 
+