Sources: container labels in one field, colored by compose project

- One label per container (project/service) in a single field, like
  tag pickers: followed ones in the project color, a separator, then the
  others in grey; a click switches a label. Excluded ones last, locked.
- Stopped containers hidden by default, shown dashed and still editable
  with 'Show stopped containers'; filter box; enable/disable all apply to
  the labels shown.
- Docker app names in the log list use their compose project color.

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

web/index.html

@@ -182,15 +182,23 @@
               <h3 data-i18n="dockerTitle">Docker containers</h3>
               <p id="dockerStatus" class="docker-status"></p>
               <div id="dockerBody" hidden>
-                <label class="switch-row">
-                  <input id="dockerDefault" type="checkbox" class="switch">
-                  <span data-i18n="dockerDefault">Follow new containers automatically</span>
-                </label>
-                <div class="docker-actions">
-                  <button id="dockerAll" class="btn" type="button" data-i18n="dockerAll">Enable all</button>
-                  <button id="dockerNone" class="btn ghost" type="button" data-i18n="dockerNone">Disable all</button>
+                <div class="dk-opts">
+                  <label class="switch-row">
+                    <input id="dockerDefault" type="checkbox" class="switch">
+                    <span data-i18n="dockerDefault">Follow new containers automatically</span>
+                  </label>
+                  <label class="switch-row">
+                    <input id="dockerStopped" type="checkbox" class="switch">
+                    <span id="dockerStoppedLbl">Show stopped containers</span>
+                  </label>
                 </div>
-                <div id="dockerList" class="docker-list"></div>
+                <div class="dk-toolbar">
+                  <input id="dockerFilter" type="search" class="dk-filter" autocomplete="off" spellcheck="false" data-i18n-ph="dockerFilter" data-i18n-aria="dockerFilter">
+                  <button id="dockerAll" class="link-btn" type="button" data-i18n="dockerAll">Enable all</button>
+                  <button id="dockerNone" class="link-btn" type="button" data-i18n="dockerNone">Disable all</button>
+                </div>
+                <div id="dockerList" class="chip-field"></div>
+                <p class="dk-legend" data-i18n="dockerLegend"></p>
               </div>
               <p class="muted small" data-i18n="dockerHelp"></p>
             </section>