Soften updater stub messaging (no error)

pikit-web/index.html

@@ -22,6 +22,7 @@
         <span id="updatesNoteTop" class="hint quiet"></span>
         <span id="refreshFlagTop" class="status-chip quiet">Refresh: 10s</span>
         <span id="tempFlagTop" class="status-chip quiet">Temp: OK</span>
+        <span id="releaseFlagTop" class="status-chip quiet">Pi-Kit: n/a</span>
       </div>
       <div class="top-actions">
         <button
@@ -32,6 +33,9 @@
         >
           <span id="themeToggleIcon" aria-hidden="true">&#127769;</span>
         </button>
+        <button id="releaseBtn" class="ghost" title="Pi-Kit updates">
+          Update
+        </button>
         <button id="aboutBtn" class="ghost" title="About Pi-Kit">About</button>
         <button id="helpBtn" class="ghost" title="Open help">Help</button>
         <button id="advBtn" class="ghost" title="Open settings">
@@ -83,6 +87,52 @@
       </div>
     </div>
 
+    <div id="releaseModal" class="modal hidden">
+      <div class="modal-card wide">
+        <div class="panel-header sticky">
+          <div>
+            <p class="eyebrow">Updates</p>
+            <h3>Pi-Kit releases</h3>
+            <p class="hint">
+              Check for a new Pi-Kit release, download it, and install from here.
+            </p>
+          </div>
+          <button id="releaseClose" class="ghost icon-btn close-btn" title="Close updates panel">
+            &times;
+          </button>
+        </div>
+        <div class="controls column">
+          <div class="control-card">
+            <div>
+              <p class="hint quiet">Current version</p>
+              <h3 id="releaseCurrent">n/a</h3>
+            </div>
+            <div>
+              <p class="hint quiet">Latest available</p>
+              <h3 id="releaseLatest">—</h3>
+              <p id="releaseStatusMsg" class="hint status-msg"></p>
+            </div>
+          </div>
+          <div class="control-actions split-row">
+            <button id="releaseCheckBtn" class="ghost" title="Check for a new release">
+              Check
+            </button>
+            <button id="releaseApplyBtn" title="Download and install the latest release">
+              Download &amp; install
+            </button>
+            <button id="releaseRollbackBtn" class="ghost" title="Rollback to previous backup">
+              Rollback
+            </button>
+            <label class="checkbox-row inline">
+              <input type="checkbox" id="releaseAutoCheck" />
+              <span>Auto-check daily</span>
+            </label>
+          </div>
+          <div id="releaseProgress" class="hint status-msg"></div>
+        </div>
+      </div>
+    </div>
+
     <div id="busyOverlay" class="overlay hidden">
       <div class="overlay-box">
         <h3 id="busyTitle">Working…</h3>