Show the gesture, and offer the full text when the card clips

Two faults behind one report. The card clipped long descriptions, and it
never rendered the how field at all - so for SHIFT + REMAIN, where the
instruction IS a three-second hold, the most important part was missing
rather than merely shortened.

Measured rather than assumed: that entry is Live mode, how is "Hold
SHIFT, hold REMAIN 3 s", desc is 112 characters, and the pair renders
43px tall into a 29px two-line clamp. A full line was being lost.

The gesture now leads the card text in the accent colour, and a MORE
button opens a sheet with the combo, the gesture, the full description,
the modes it applies in and the manual page. Whether to offer MORE is
decided by measuring scrollHeight against clientHeight, not by guessing
a character count, so it appears exactly when text is really cut. 39 of
159 entries qualify: 24 carry a gesture, 17 have a description over 110
characters.

The card stays 84px because the panel needs that space, so a sheet is
the right place for the overflow, as in the reference.

141 tests, typecheck clean, installed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/App.module.css

@@ -112,3 +112,29 @@
 .sheetLabel:first-child {
   margin-top: 0;
 }
+
+/* The detail sheet: what the 84px card cannot hold. */
+.detailCombo {
+  margin: 0;
+  font-family: var(--mono);
+  font-size: 12px;
+  font-weight: 700;
+  letter-spacing: 0.04em;
+  color: var(--accent);
+}
+
+/* The gesture is the instruction for the 24 entries that have one. */
+.detailHow {
+  margin: 0;
+  font-size: 13px;
+  font-weight: 700;
+  line-height: 1.3;
+}
+
+.detailBody {
+  margin: 0;
+  font-size: 13px;
+  line-height: 1.4;
+  color: var(--muted);
+  text-wrap: pretty;
+}

src/App.tsx

@@ -11,7 +11,7 @@ import { useCallback, useEffect, useMemo, useReducer, useRef, useState } from "r
 import { DECKS, boxDistribution, deckPool, knownCount, pickCard } from "./domain/drill";
 import type { DeckId, Direction, InputMode } from "./domain/drill";
 import { ENTRIES, layerKeyOf } from "./domain/entries";
-import { controlName } from "./domain/format";
+import { comboText, contextNames, controlName } from "./domain/format";
 import { CTX, CTXHINT, NOLATCH } from "./domain/labels";
 import {
   entriesByTarget,
@@ -35,7 +35,7 @@ import styles from "./App.module.css";
 
 const TABS = ["Explore", "Drill", "Find", "Rules"] as const;
 type Tab = (typeof TABS)[number];
-type OpenSheet = null | "mode" | "layer" | "settings";
+type OpenSheet = null | "mode" | "layer" | "settings" | "detail";
 
 /** Longer than this and the press was a hold to peek, not a tap to lock. */
 const HOLD_MS = 350;
@@ -322,7 +322,13 @@ export function App() {
           onPickOption={(name) => dispatch({ type: "pickOption", name })}
         />
       ) : (
-        <InfoCard entry={selected} ctx={ctx} hint={CTXHINT[ctx]} count={onLayer.length} />
+        <InfoCard
+          entry={selected}
+          ctx={ctx}
+          hint={CTXHINT[ctx]}
+          count={onLayer.length}
+          onMore={() => setSheet("detail")}
+        />
       )}
 
       <nav className={styles.nav}>
@@ -337,6 +343,36 @@ export function App() {
         ))}
       </nav>
 
+      <Sheet
+        open={sheet === "detail" && selected !== null}
+        title={selected ? selected.name : ""}
+        onClose={() => setSheet(null)}
+      >
+        {selected ? (
+          <>
+            <p className={styles.sheetLabel}>Combo</p>
+            <p className={styles.detailCombo}>{comboText(selected)}</p>
+
+            {selected.how ? (
+              <>
+                <p className={styles.sheetLabel}>Gesture</p>
+                <p className={styles.detailHow}>{selected.how}</p>
+              </>
+            ) : null}
+
+            <p className={styles.sheetLabel}>What it does</p>
+            <p className={styles.detailBody}>
+              {selected.desc || "No description in the reference."}
+            </p>
+
+            <p className={styles.sheetLabel}>Where</p>
+            <p className={styles.detailBody}>
+              {contextNames(selected.ctx).join(", ")} &middot; manual p.{selected.page}
+            </p>
+          </>
+        ) : null}
+      </Sheet>
+
       <Sheet open={sheet === "mode"} title="Where you are" onClose={() => setSheet(null)}>
         {(Object.keys(CTX) as ContextCode[]).map((code) => (
           <SheetOption

src/ui/InfoCard.module.css

@@ -35,6 +35,30 @@
   flex: 0 0 auto;
 }
 
+.metaRight {
+  flex: 0 0 auto;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.more {
+  font-family: var(--font);
+  font-size: 9px;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  color: var(--ink);
+  background: none;
+  border: var(--outline);
+  padding: 2px 6px;
+}
+
+/* The gesture, when the table gives one: read this before the description. */
+.how {
+  color: var(--accent);
+  font-weight: 700;
+}
+
 .combo {
   display: flex;
   align-items: center;

src/ui/InfoCard.tsx

@@ -1,5 +1,6 @@
 /** The card under the panel: the layer's hint, or the selected combo. */
-import { comboParts, contextNames } from "../domain/format";
+import { useEffect, useRef, useState } from "react";
+import { comboParts } from "../domain/format";
 import type { ContextCode, Entry } from "../domain/types";
 import styles from "./InfoCard.module.css";
 
@@ -8,9 +9,21 @@ export interface InfoCardProps {
   readonly ctx: ContextCode;
   readonly hint: string;
   readonly count: number;
+  /** Open the full description. Offered when the card cannot show it all. */
+  readonly onMore: () => void;
 }
 
-export function InfoCard({ entry, hint, count }: InfoCardProps) {
+export function InfoCard({ entry, hint, count, onMore }: InfoCardProps) {
+  const body = useRef<HTMLParagraphElement>(null);
+  const [clipped, setClipped] = useState(false);
+
+  // Measured rather than guessed from a character count: the card is a fixed
+  // 84px, so whether the text fits depends on how it wraps.
+  useEffect(() => {
+    const el = body.current;
+    setClipped(el !== null && el.scrollHeight > el.clientHeight + 1);
+  }, [entry]);
+
   if (!entry) {
     return (
       <div className={styles.card}>
@@ -27,6 +40,10 @@ export function InfoCard({ entry, hint, count }: InfoCardProps) {
     );
   }
 
+  // The gesture matters as much as the description — SHIFT + REMAIN is a
+  // three-second hold — so a card carrying one always offers the full text.
+  const showMore = clipped || entry.how !== undefined;
+
   return (
     <div className={styles.card}>
       <div className={styles.meta}>
@@ -38,11 +55,19 @@ export function InfoCard({ entry, hint, count }: InfoCardProps) {
             </span>
           ))}
         </span>
+        <span className={styles.metaRight}>
+          {showMore ? (
+            <button className={styles.more} onClick={onMore}>
+              MORE
+            </button>
+          ) : null}
           <span className={styles.page}>P.{entry.page}</span>
+        </span>
       </div>
       <h2 className={styles.title}>{entry.name}</h2>
-      <p className={styles.body}>
+      <p className={styles.body} ref={body}>
-        {entry.desc || contextNames(entry.ctx).join(", ")}
+        {entry.how ? <b className={styles.how}>{entry.how}. </b> : null}
+        {entry.desc}
       </p>
     </div>
   );