doc(IDom2HtmlService): update documentation (#7885)

* docs: add Dom2HtmlService and SignalR setup tips for Dom2Image sample

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* docs: align Dom2Image setup snippets to builder.Services style

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Co-authored-by: h2ls <33386249+h2ls@users.noreply.github.com>

* doc: 更新文档

* doc: 更新资源文件

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: h2ls <33386249+h2ls@users.noreply.github.com>
Co-authored-by: Argo Zhang <argo@live.ca>

Author: 3 people

src/BootstrapBlazor.Server/Components/Samples/Dom2Images.razor

@@ -1,11 +1,18 @@
-@page "/dom2image"
+@page "/dom2image"
 
 <h3>@Localizer["Dom2ImageTitle"]</h3>
 
 <h4>@Localizer["Dom2ImageIntro"]</h4>
 
 <PackageTips Name="BootstrapBlazor.Dom2Image" />
 
+<Tips>
+    <p>@((MarkupString)Localizer["Dom2ImageServiceInjectTip"].Value)</p>
+    <Pre class="no-highlight">builder.Services.AddBootstrapBlazorDom2ImageService();</Pre>
+    <p>@((MarkupString)Localizer["Dom2ImageSignalRConfigTip"].Value)</p>
+    <Pre class="no-highlight">builder.Services.Configure&lt;HubOptions&gt;(option => option.MaximumReceiveMessageSize = null);</Pre>
+</Tips>
+
 <DemoBlock Title="@Localizer["Dom2ImageNormalTitle"]" Introduction="@Localizer["Dom2ImageNormalIntro"]" Name="Normal">
     <section ignore>
         <p>@((MarkupString)Localizer["Dom2ImageDesc"].Value)</p>
@@ -29,4 +36,3 @@
         }
     </section>
 </DemoBlock>
-

src/BootstrapBlazor.Server/Locales/en-US.json

@@ -2018,6 +2018,8 @@
     "Dom2ImageIntro": "Export HTML snippets as images",
     "Dom2ImageNormalIntro": "Convert the node to an image by specifying a <code>Selector</code>",
     "Dom2ImageNormalTitle": "Basic usage",
+    "Dom2ImageServiceInjectTip": "Before using <code>IDom2HtmlService</code>, manually register this service",
+    "Dom2ImageSignalRConfigTip": "Also configure the SignalR maximum receive message size (example: <code>10 MB</code>)",
     "Dom2ImageTitle": "Dom2Image"
   },
   "BootstrapBlazor.Server.Components.Samples.Downloads": {

src/BootstrapBlazor.Server/Locales/zh-CN.json

@@ -2018,6 +2018,8 @@
     "Dom2ImageIntro": "将 Html 片段导出为图片",
     "Dom2ImageNormalIntro": "通过指定 <code>Selector</code> 将此节点转成图片",
     "Dom2ImageNormalTitle": "基本用法",
+    "Dom2ImageServiceInjectTip": "使用 <code>IDom2HtmlService</code> 前请先手动注入服务",
+    "Dom2ImageSignalRConfigTip": "同时请配置 SignalR 的最大接收消息大小（示例为 <code>10 MB</code>）",
     "Dom2ImageTitle": "Dom2Image 元素转图片"
   },
   "BootstrapBlazor.Server.Components.Samples.Downloads": {