refactor: move std-dev info to accordion, remove tooltip (#19)

- Add "Round spread" row (±stdDev, range lo–hi) to desktop accordion
  (player-history.ejs) and mobile card expanded section (ratings-cards.ejs)
- Remove .std-dev-tooltip div and .std-dev-inline span from table partial
- Remove stdDevTooltipText, updateStdDevInline, initRatingsTooltips helpers
  and all call sites from players.js
- Remove .std-dev-tooltip and .std-dev-inline CSS rules; drop cursor:help
  from .rating-value

views/partials/player-history.ejs

@@ -26,6 +26,12 @@ const chartPdgaNumber = hasPlayer ? player.pdgaNumber : pdgaNumber;
         <dt>Gap to predicted</dt>
         <dd><%- include('delta-pill', { value: player.deltaPredicted, extraClass: 'delta-predicted-pill' }) %></dd>
       </div>
+      <% if (player.stdDev != null && player.rating) { %>
+      <div>
+        <dt>Round spread</dt>
+        <dd>±<%= player.stdDev %> (range <%= player.rating - player.stdDev %>–<%= player.rating + player.stdDev %>)</dd>
+      </div>
+      <% } %>
     </dl>
     <button class="link-btn" onclick="showDebugInfo(<%= player.pdgaNumber %>)" style="margin-top: 4px;">View calculation details →</button>
   </div>

views/partials/ratings-cards.ejs

@@ -114,6 +114,12 @@ function renderSparkline(values, opts) {
                     <dt>Gap to predicted</dt>
                     <dd><span class="delta-pill <%= predCls %> delta-predicted-pill"><span class="delta-glyph"><%= predGlyph %></span><span class="delta-num"><%= predNum %></span></span></dd>
                 </div>
+                <% if (player.stdDev != null && player.rating) { %>
+                <div>
+                    <dt>Round spread</dt>
+                    <dd>±<%= player.stdDev %> (range <%= player.rating - player.stdDev %>–<%= player.rating + player.stdDev %>)</dd>
+                </div>
+                <% } %>
             </dl>
         </div>
     </div>

views/partials/ratings-table.ejs

@@ -67,14 +67,12 @@ function renderSparkline(values, opts) {
                     <% } else { %>
                     <span class="rating-pending">Click to load</span>
                     <% } %>
-                    <div class="std-dev-tooltip" id="tooltip-rating-<%= player.pdgaNumber %>"></div>
                 </td>
                 <td class="col-predicted" id="predicted-<%= player.pdgaNumber %>">
                     <% if (player.predictedRating) { %>
                     <div class="pred-stack">
                         <span class="predicted-value pred-num mono" data-stddev="<%= player.stdDev || '' %>" data-pdga="<%= player.pdgaNumber %>"><%= player.predictedRating %></span>
                         <%- include('delta-pill', { value: player.deltaPredicted, extraClass: 'delta-predicted-pill' }) %>
-                        <% if (player.stdDev != null) { %><span class="std-dev-inline mono">±<%= player.stdDev %></span><% } %>
                     </div>
                     <% } else { %>
                     <span class="rating-pending">—</span>