Move Report an Issue into sticky panel footer (THE-114)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

public/css/panel.css

@@ -20,7 +20,6 @@
   right: 0;
   width: 340px;
   height: 100vh;
-  overflow-y: auto;
   background: var(--color-surface);
   border-left: 1px solid var(--color-border);
   box-shadow: var(--shadow-md);
@@ -233,6 +232,14 @@
 .vote-score.negative { color: #c84040; }
 .vote-score.zero     { color: var(--color-text-secondary); }
 
+/* Footer (sticky, always visible) */
+#panel-footer {
+  flex-shrink: 0;
+  padding: var(--space-3) var(--space-4);
+  border-top: 1px solid var(--color-border);
+  background: var(--color-surface);
+}
+
 /* Report buttons */
 #panel-report-section {
   display: flex;

public/index.html

@@ -81,6 +81,8 @@
           <span id="panel-rating"></span>
         </div>
 
+      </div>
+      <div id="panel-footer">
         <div id="panel-report-section">
           <span class="panel-section-label">Report an Issue</span>
           <div id="panel-report-buttons">