Add "similar" link for searching host name

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

webclient/src/Article.js

@@ -2,7 +2,7 @@ import React, { useState, useEffect } from 'react';
 import { useParams } from 'react-router-dom';
 import { Helmet } from 'react-helmet';
 import localForage from 'localforage';
-import { sourceLink, infoLine, ToggleDot } from './utils.js';
+import { sourceLink, similarLink, infoLine, ToggleDot } from './utils.js';
 import Latex from 'react-latex-next';
 import 'katex/dist/katex.min.css';
 
@@ -12,6 +12,7 @@ const DANGEROUS_TAGS = ['svg', 'math'];
 const latexDelimiters = [
     { left: '$$', right: '$$', display: true },
     { left: '\\[', right: '\\]', display: true },
+    { left: '$', right: '$', display: false },
     { left: '\\(', right: '\\)', display: false }
 ];
 
@@ -105,7 +106,7 @@ function Article({ cache }) {
 
 			if (v.nodeName === '#text') {
 				const text = v.data;
-				if (text.includes('\\[') || text.includes('\\(') || text.includes('$$')) {
+				if (text.includes('\\[') || text.includes('\\(') || text.includes('$$') || /\$(?:[^$]*[^\s$])\$/.test(text)) {
 					return <Latex key={key} delimiters={latexDelimiters}>{text}</Latex>;
 				}
 
@@ -158,6 +159,13 @@ function Article({ cache }) {
 						const firstParen = mathContent.indexOf('\\(');
 						const lastParen = mathContent.lastIndexOf('\\)');
 						mathContent = mathContent.substring(0, firstParen) + '\\[' + mathContent.substring(firstParen + 2, lastParen) + '\\]' + mathContent.substring(lastParen + 2);
+					} else if (trimmed.startsWith('$') && !trimmed.startsWith('$$')) {
+						// Replace $ with $$
+						const firstDollar = mathContent.indexOf('$');
+						const lastDollar = mathContent.lastIndexOf('$');
+						if (firstDollar !== lastDollar) {
+							mathContent = mathContent.substring(0, firstDollar) + '$$' + mathContent.substring(firstDollar + 1, lastDollar) + '$$' + mathContent.substring(lastDollar + 1);
+						}
 					}
 				}
 				return <Tag {...props}><Latex delimiters={latexDelimiters}>{mathContent}</Latex></Tag>;
@@ -205,7 +213,7 @@ function Article({ cache }) {
 					<h1>{story.title} <button className='copy-button' onClick={copyLink}>{copyButtonText}</button></h1>
 
 					<div className='info'>
-						Source: {sourceLink(story)}
+						Source: {sourceLink(story)} | {similarLink(story)}
 					</div>
 
 					{infoLine(story)}

webclient/src/Style-light.css

@@ -360,3 +360,33 @@ button.comment {
 	border-width: 0 2px 2px 0;
 	transform: rotate(45deg);
 }
+
+.tooltip .tooltiptext {
+	visibility: hidden;
+	width: 140px;
+	background-color: #555;
+	color: #fff;
+	text-align: center;
+	border-radius: 6px;
+	padding: 5px 0;
+	position: absolute;
+	z-index: 1;
+	bottom: 110%;
+	left: 50%;
+	margin-left: -70px;
+	opacity: 0;
+	transition: opacity 0.2s;
+	font-size: 0.9rem;
+	line-height: 1.3;
+}
+
+.forwardDot .tooltiptext {
+	left: auto;
+	right: 0;
+	margin-left: 0;
+}
+
+.tooltip.show-tooltip .tooltiptext {
+	visibility: visible;
+	opacity: 1;
+}

webclient/src/utils.js

@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState } from 'react';
 import moment from 'moment';
 import { Link } from 'react-router-dom';
 
@@ -9,6 +9,13 @@ export const sourceLink = (story) => {
 	return (<a className='source' href={url}>{host}</a>);
 };
 
+export const similarLink = (story) => {
+	const url = story.url || story.link;
+	const urlObj = new URL(url);
+	const host = urlObj.hostname.replace(/^www\./, '');
+	return (<Link to={'/search?q="'+host+'"'} className='similar'>similar</Link>);
+};
+
 export const infoLine = (story) =>
 	<div className='info'>
 		{story.score} points
@@ -32,6 +39,8 @@ export const ToggleDot = ({ id, article }) => (
 );
 
 export const BackwardDot = () => {
+	const [showTooltip, setShowTooltip] = useState(false);
+
 	const goBackward = () => {
 		localStorage.setItem('scrollLock', 'True');
 		window.history.back();
@@ -42,15 +51,25 @@ export const BackwardDot = () => {
 	if (!document.fullscreenElement) return null;
 
 	return (
-		<div className='dot backwardDot' onClick={goBackward}>
+		<div
+			className={'dot backwardDot tooltip' + (showTooltip ? ' show-tooltip' : '')}
+			onClick={goBackward}
+			onMouseEnter={() => setShowTooltip(true)}
+			onMouseLeave={() => setShowTooltip(false)}
+			onTouchStart={() => setShowTooltip(true)}
+			onTouchEnd={() => setShowTooltip(false)}
+		>
 			<div className='button'>
 				
 			</div>
+			<span className="tooltiptext">Browser Back</span>
 		</div>
 	);
 };
 
 export const ForwardDot = () => {
+	const [showTooltip, setShowTooltip] = useState(false);
+
 	const goForward = () => {
 		localStorage.setItem('scrollLock', 'True');
 		window.history.forward();
@@ -60,10 +79,18 @@ export const ForwardDot = () => {
 	if (!isMobile) return null;
 
 	return (
-		<div className='dot forwardDot' onClick={goForward}>
+		<div
+			className={'dot forwardDot tooltip' + (showTooltip ? ' show-tooltip' : '')}
+			onClick={goForward}
+			onMouseEnter={() => setShowTooltip(true)}
+			onMouseLeave={() => setShowTooltip(false)}
+			onTouchStart={() => setShowTooltip(true)}
+			onTouchEnd={() => setShowTooltip(false)}
+		>
 			<div className='button'>
 				
 			</div>
+			<span className="tooltiptext">Browser Forward</span>
 		</div>
 	);
 };