Fix: restore retention help link text

ftl/core/help.ftl

@@ -2,8 +2,8 @@
 
 ## Header/footer
 
-# Field for linking to more manual details
-help-for-more-info = ​
+# Link to more detailed information in the manual
+help-for-more-info = For more information, see { $link } in the manual.
 
 # Tooltip for links to the manual
 help-open-manual-chapter = Open { $name } in the manual

ts/lib/components/HelpModal.svelte

@@ -22,7 +22,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     import { type HelpItem, HelpItemScheduler } from "./types";
 
     export let title: string;
-    export let url: string;
+    export let url: string | undefined;
     export let startIndex = 0;
     export let helpSections: HelpItem[];
     export let fsrs = false;

ts/lib/components/HelpSection.svelte

@@ -42,9 +42,7 @@
     <div class="chapter-redirect">
         {@html renderMarkdown(
             tr.helpForMoreInfo({
-                link: `<a href="${item.url}" title="${tr.helpOpenManualChapter({
-                    name: item.title,
-                })}">${item.title}</a>`,
+                link: `<a href="${item.url}" title="${tr.helpOpenManualChapter({ name: item.title })}">${item.title}</a>`,
             }),
         )}
     </div>

ts/routes/graphs/TrueRetention.svelte

@@ -5,7 +5,6 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 <script lang="ts">
     import type { GraphsResponse } from "@generated/anki/stats_pb";
     import * as tr from "@generated/ftl";
-    import { HelpPage } from "@tslib/help-page";
     import HelpModal from "$lib/components/HelpModal.svelte";
     import type Carousel from "bootstrap/js/dist/carousel";
     import type Modal from "bootstrap/js/dist/modal";
@@ -72,6 +71,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     >
         <HelpModal
             title={tr.statisticsTrueRetentionTitle()}
+            url=""
             {helpSections}
             on:mount={(e) => {
                 modal = e.detail.modal;