Add help modal to TR table (#3874)

* Update TrueRetention.svelte adding description

* Update statistics.ftl to add additional info

* Swap TR with DR

* Change string to 'Is expected to'

* Add help modal to TR table

* Add tooltip slot to Graph.svelte (thanks @Luc-Mcgrady)

* Fix lint warning and failing test

* Remove unused code

* removedd on:mount to make eslint happy

* ADD back on:mount

* ADD back code needed for on:mount

* REMOVE openHelpModal() as I couldn't figure out how to make the title clickable

* attempt to ADD clickable title (BROKEN\!)

* Update ts/lib/components/TitledContainer.svelte

Co-authored-by: Luc Mcgrady <lucmcgrady@gmail.com>

* Update ts/routes/graphs/Graph.svelte

Co-authored-by: Luc Mcgrady <lucmcgrady@gmail.com>

* Update ts/routes/graphs/TrueRetention.svelte

Co-authored-by: Luc Mcgrady <lucmcgrady@gmail.com>

* ADD exported onTitleClick as @Luc-Mcgrady suggested

* REMOVE vite.config.ts file

---------

Co-authored-by: Luc Mcgrady <lucmcgrady@gmail.com>

ftl/core/statistics.ftl

@@ -114,6 +114,7 @@ statistics-counts-separate-suspended-buried-cards = Separate suspended/buried ca
 
 statistics-true-retention-title = True Retention
 statistics-true-retention-subtitle = Pass rate of cards with an interval ≥ 1 day.
+statistics-true-retention-tooltip = If you are using FSRS, your true retention is expected to be close to your desired retention. Please keep in mind that data for a single day is noisy, so it's better to look at monthly data.
 statistics-true-retention-range = Range
 statistics-true-retention-pass = Pass
 statistics-true-retention-fail = Fail

ts/lib/components/TitledContainer.svelte

@@ -12,6 +12,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     export { className as class };
 
     export let title: string;
+    export let onTitleClick: ((_e: MouseEvent | KeyboardEvent) => void) | null = null;
 </script>
 
 <div
@@ -24,7 +25,22 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     style:--container-margin="0"
 >
     <div class="position-relative">
-        <h1>{title}</h1>
+        {#if onTitleClick}
+            <span
+                on:click={onTitleClick}
+                on:keydown={onTitleClick}
+                role="button"
+                tabindex="0"
+            >
+                <h1>
+                    {title}
+                </h1>
+            </span>
+        {:else}
+            <h1>
+                {title}
+            </h1>
+        {/if}
         <div class="help-badge position-absolute" class:rtl>
             <slot name="tooltip" />
         </div>

ts/routes/graphs/Graph.svelte

@@ -8,6 +8,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     // When title is null (default), the graph is inlined, not having TitledContainer wrapper.
     export let title: string | null = null;
     export let subtitle: string | null = null;
+    export let onTitleClick: ((_e: MouseEvent | KeyboardEvent) => void) | null = null;
 </script>
 
 {#if title == null}
@@ -18,7 +19,8 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         <slot />
     </div>
 {:else}
-    <TitledContainer class="d-flex flex-column" {title}>
+    <TitledContainer class="d-flex flex-column" {title} {onTitleClick}>
+        <slot slot="tooltip" name="tooltip"></slot>
         <div class="graph d-flex flex-grow-1 flex-column justify-content-center">
             {#if subtitle}
                 <div class="subtitle">{subtitle}</div>

ts/routes/graphs/TrueRetention.svelte

@@ -5,6 +5,11 @@ 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 "$lib/components/HelpModal.svelte";
+    import type Carousel from "bootstrap/js/dist/carousel";
+    import type Modal from "bootstrap/js/dist/modal";
+    import type { HelpItem } from "$lib/components/types";
 
     import { type RevlogRange } from "./graph-helpers";
     import { DisplayMode, type PeriodTrueRetentionData, Scope } from "./true-retention";
@@ -31,13 +36,43 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         }
     });
 
+    const retentionHelp = {
+        trueRetention: {
+            title: tr.statisticsTrueRetentionTitle(),
+            help: tr.statisticsTrueRetentionTooltip(),
+        },
+    };
+
+    const helpSections: HelpItem[] = Object.values(retentionHelp);
+
+    let modal: Modal;
+    let carousel: Carousel;
+
+    function openHelpModal(index: number): void {
+        modal.show();
+        carousel.to(index);
+    }
+
     let mode: DisplayMode = $state(DisplayMode.Summary);
 
     const title = tr.statisticsTrueRetentionTitle();
     const subtitle = tr.statisticsTrueRetentionSubtitle();
+    const onTitleClick = () => {
+        openHelpModal(Object.keys(retentionHelp).indexOf("trueRetention"));
+    };
 </script>
 
-<Graph {title} {subtitle}>
+<Graph {title} {subtitle} {onTitleClick}>
+    <HelpModal
+        title={tr.statisticsTrueRetentionTitle()}
+        url={HelpPage.DeckOptions.fsrs}
+        slot="tooltip"
+        {helpSections}
+        on:mount={(e) => {
+            modal = e.detail.modal;
+            carousel = e.detail.carousel;
+        }}
+    />
     <InputBox>
         <label>
             <input type="radio" bind:group={mode} value={DisplayMode.Young} />