Port the introduction's naming and clock screens

A new game now runs NewGame's InitGender and OakSpeech natively before
the bedroom: Boy or Girl, InitClock's hour and minute steppers with
their YES/NO confirmations, Oak's speech with Wooper, and NamePlayer's
preset names or naming field (a blank name takes CHRIS or KRIS). Texts,
menus and time strings come from a new INTRO profile table verified by
check:reference; Oak's and the player's pictures decode from
TrainerPicPointers, ChrisPic/KrisPic and TrainerPalettes.

The chosen time is kept as a minute offset from the device clock, which
time of day, the weekday, NPC hours and the daily reset now read. The
intro runs only when nothing is saved; a save made during it starts it
again. Saves gain intro and clock.minuteOffset, migrated by absence. The
shell's name and character fields are gone. Intentional change: the
steppers start at the device time rather than 10:00.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/shell.ts

@@ -22,10 +22,6 @@ export function renderShell(root: HTMLElement) {
               <div id="screen-empty" class="screen-empty">
                 <form class="load-card" onsubmit="return false">
                   <p class="menu-title">NEW SESSION</p><h1>Load your Crystal ROM</h1><p>English US/Europe · Revision 1.1</p>
-                  <div class="player-setup">
-                    <label>Name <input id="player-name" value="CHRIS" maxlength="7" pattern="[A-Za-z0-9 -]{1,7}" autocomplete="off"></label>
-                    <label>Character <select id="player-avatar"><option value="chris">Chris</option><option value="kris">Kris</option></select></label>
-                  </div>
                   <label class="primary-button file-button" id="rom-label" for="rom-file"><span aria-hidden="true">▶</span> Choose ROM</label>
                   <p class="privacy-note">Opened locally. Never uploaded.</p>
                 </form>
@@ -41,6 +37,7 @@ export function renderShell(root: HTMLElement) {
                 <p id="mart-money" class="mart-money"></p>
                 <div class="mart-box"><p id="mart-prompt" aria-live="polite"></p><div id="mart-menu" class="mart-menu"></div></div>
               </div>
+              <div id="intro-screen" class="intro-screen" hidden></div>
               <div id="pokepic" class="pokepic" hidden><canvas id="pokepic-canvas" width="56" height="56" role="img"></canvas><button id="pokepic-next" hidden>Continue <span aria-hidden="true">▶</span></button></div>
               <div id="native-dialogue" class="native-dialogue" aria-label="Dialogue" hidden><p id="dialogue-text" aria-live="polite"></p><div id="dialogue-choice" class="dialogue-choice" hidden></div><div><span id="dialogue-page"></span><button id="dialogue-next">Continue <span aria-hidden="true">▶</span></button></div></div>
               <div id="pause-overlay" class="pause-overlay" hidden><span>PAUSED</span><button id="screen-resume">Continue playing</button></div>