feat: collapsible nested sidebar groups

Group headers (Voice Actions, Speak, Setup) are now collapsible parents;
Tags nests under Library; Integrations + Settings nest under Setup.
Navigating a section auto-opens its whole ancestor tree chain.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

static/index.html

@@ -128,74 +128,92 @@
         <div class="nav-tree-item"           data-voice-cat="favorites" onclick="navVoicesCat('favorites')"><span class="mdi mdi-star-outline"></span> Favourites <span class="ntc" id="ntc-favorites"></span></div>
         <div class="nav-tree-item"           data-voice-cat="hidden"    onclick="navVoicesCat('hidden')"><span class="mdi mdi-eye-off-outline"></span> Hidden <span class="ntc" id="ntc-hidden"></span></div>
         <div class="nav-tree-item"           data-voice-cat="tools"     onclick="navVoicesCat('tools')"><span class="mdi mdi-wrench-outline"></span> Tools</div>
+        <div class="nav-tree-head nav-subhead" id="nav-tags-head" onclick="toggleNavTree('nav-tags-tree','nav-tags-chevron')">
+          <span class="nav-icon"><span class="mdi mdi-tag-multiple-outline"></span></span>
+          <span class="nav-label">Tags</span>
+          <span class="nav-chevron" id="nav-tags-chevron"><span class="mdi mdi-chevron-down"></span></span>
+        </div>
+        <div class="nav-tree" id="nav-tags-tree"></div>
       </div>
-      <div class="nav-item nav-tree-head" data-nav-section="s-voices" id="nav-tags-head" onclick="navTo('s-voices')">
+      <div class="nav-group-head" id="nav-actions-head" onclick="toggleNavTree('nav-actions-tree','nav-actions-chevron')">
-        <span class="nav-icon"><span class="mdi mdi-tag-multiple-outline"></span></span>
+        <span class="nav-label">Voice Actions</span>
-        <span class="nav-label">Tags</span>
+        <span class="nav-chevron" id="nav-actions-chevron"><span class="mdi mdi-chevron-down"></span></span>
-        <span class="nav-chevron" id="nav-tags-chevron" onclick="event.stopPropagation();toggleNavTree('nav-tags-tree','nav-tags-chevron')"><span class="mdi mdi-chevron-down"></span></span>
       </div>
-      <div class="nav-tree" id="nav-tags-tree"></div>
+      <div class="nav-tree" id="nav-actions-tree">
-      <div class="nav-group-label">Voice Actions</div>
+        <div class="nav-tree-item" data-nav-section="s-clone"  onclick="navTo('s-clone')"><span class="mdi mdi-microphone-variant"></span> Clone a Voice</div>
-      <div class="nav-item" data-nav-section="s-clone"        onclick="navTo('s-clone')">        <span class="nav-icon"><span class="mdi mdi-microphone-variant"></span></span> Clone a Voice</div>
+        <div class="nav-tree-item" data-nav-section="s-design" onclick="navTo('s-design')"><span class="mdi mdi-auto-fix"></span> Design a Voice</div>
-      <div class="nav-item" data-nav-section="s-design"       onclick="navTo('s-design')">       <span class="nav-icon"><span class="mdi mdi-auto-fix"></span></span> Design a Voice</div>
+        <div class="nav-tree-item" data-nav-section="s-studio" onclick="navTo('s-studio')"><span class="mdi mdi-earth"></span> Get a Voice Online</div>
-      <div class="nav-item" data-nav-section="s-studio"       onclick="navTo('s-studio')">       <span class="nav-icon"><span class="mdi mdi-earth"></span></span> Get a Voice Online</div>
-
-      <div class="nav-group-label">Speak</div>
-      <div class="nav-item" data-nav-section="s-tryout"       onclick="navTo('s-tryout')">       <span class="nav-icon"><span class="mdi mdi-play"></span></span> Quick Play</div>
-      <div class="nav-item" data-nav-section="s-conversation" onclick="navTo('s-conversation')"> <span class="nav-icon"><span class="mdi mdi-forum-outline"></span></span> Conversation</div>
-      <div class="nav-item" data-nav-section="s-reader" onclick="navTo('s-reader')"> <span class="nav-icon"><span class="mdi mdi-book-open-page-variant-outline"></span></span> Read Aloud</div>
-      <div class="nav-item nav-tree-head" data-nav-section="s-rehearser" id="nav-rehearser-head" onclick="navTo('s-rehearser')">
-        <span class="nav-icon"><span class="mdi mdi-theater"></span></span>
-        <span class="nav-label">Script Rehearsal</span>
-        <span class="nav-chevron" id="nav-rehearser-chevron" onclick="event.stopPropagation();toggleNavTree('nav-rehearser-tree','nav-rehearser-chevron')"><span class="mdi mdi-chevron-down"></span></span>
-      </div>
-      <div class="nav-tree" id="nav-rehearser-tree">
-        <div class="nav-tree-item is-active" data-rehearser-phase="3" onclick="navRehearserPhase(3)"><span class="mdi mdi-theater"></span> Stage</div>
-        <div class="nav-tree-item"           data-rehearser-phase="4" onclick="navRehearserPhase(4)"><span class="mdi mdi-check-circle-outline"></span> Summary</div>
-        <div class="nav-tree-item"           id="nav-reh-impex"       onclick="navRehearserImpEx()"><span class="mdi mdi-swap-vertical"></span> Import / Export</div>
-      </div>
-      <div class="nav-item nav-tree-head" data-nav-section="s-library" id="nav-library-head" onclick="navTo('s-library')">
-        <span class="nav-icon"><span class="mdi mdi-bookshelf"></span></span>
-        <span class="nav-label">Library</span>
-        <span class="nav-chevron" id="nav-library-chevron" onclick="event.stopPropagation();toggleNavTree('nav-library-tree','nav-library-chevron')"><span class="mdi mdi-chevron-down"></span></span>
-      </div>
-      <div class="nav-tree" id="nav-library-tree">
-        <div class="nav-tree-item is-active" data-library-view="books"      onclick="navLibraryView('books')"><span class="mdi mdi-book-open-page-variant-outline"></span> Books</div>
-        <div class="nav-tree-item"           data-library-view="plays"      onclick="navLibraryView('plays')"><span class="mdi mdi-theater"></span> Theater Plays</div>
-        <div class="nav-tree-item"           data-library-view="characters" onclick="navLibraryView('characters')"><span class="mdi mdi-account-box-multiple-outline"></span> Characters / Cast</div>
       </div>
 
-      <div class="nav-group-label" style="margin-top:6px">Setup</div>
+      <div class="nav-group-head" id="nav-speak-head" onclick="toggleNavTree('nav-speak-tree','nav-speak-chevron')">
-      <div class="nav-item" data-nav-section="s-performance"  onclick="navTo('s-performance')">  <span class="nav-icon"><span class="mdi mdi-speedometer"></span></span> Benchmark</div>
+        <span class="nav-label">Speak</span>
-      <div class="nav-item nav-tree-head" data-nav-section="s-llms" id="nav-engines-head" onclick="navTo('s-llms')">
+        <span class="nav-chevron" id="nav-speak-chevron"><span class="mdi mdi-chevron-down"></span></span>
-        <span class="nav-icon"><span class="mdi mdi-brain"></span></span>
-        <span class="nav-label">Engines</span>
-        <span class="nav-chevron" id="nav-engines-chevron" onclick="event.stopPropagation();toggleNavTree('nav-engines-tree','nav-engines-chevron')"><span class="mdi mdi-chevron-down"></span></span>
       </div>
-      <div class="nav-tree" id="nav-engines-tree">
+      <div class="nav-tree" id="nav-speak-tree">
-        <div class="nav-tree-item is-active" data-engines-cat="llm" onclick="navEnginesCat('llm')"><span class="mdi mdi-brain"></span> Language Models</div>
+        <div class="nav-tree-item" data-nav-section="s-tryout"       onclick="navTo('s-tryout')"><span class="mdi mdi-play"></span> Quick Play</div>
-        <div class="nav-tree-item"           data-engines-cat="stt" onclick="navEnginesCat('stt')"><span class="mdi mdi-ear-hearing"></span> Speech to Text</div>
+        <div class="nav-tree-item" data-nav-section="s-conversation" onclick="navTo('s-conversation')"><span class="mdi mdi-forum-outline"></span> Conversation</div>
-        <div class="nav-tree-item"           data-engines-cat="tts" onclick="navEnginesCat('tts')"><span class="mdi mdi-account-voice"></span> Text to Speech</div>
+        <div class="nav-tree-item" data-nav-section="s-reader"       onclick="navTo('s-reader')"><span class="mdi mdi-book-open-page-variant-outline"></span> Read Aloud</div>
+        <div class="nav-tree-head nav-subhead" data-nav-section="s-rehearser" id="nav-rehearser-head" onclick="navTo('s-rehearser')">
+          <span class="nav-icon"><span class="mdi mdi-theater"></span></span>
+          <span class="nav-label">Script Rehearsal</span>
+          <span class="nav-chevron" id="nav-rehearser-chevron" onclick="event.stopPropagation();toggleNavTree('nav-rehearser-tree','nav-rehearser-chevron')"><span class="mdi mdi-chevron-down"></span></span>
+        </div>
+        <div class="nav-tree" id="nav-rehearser-tree">
+          <div class="nav-tree-item is-active" data-rehearser-phase="3" onclick="navRehearserPhase(3)"><span class="mdi mdi-theater"></span> Stage</div>
+          <div class="nav-tree-item"           data-rehearser-phase="4" onclick="navRehearserPhase(4)"><span class="mdi mdi-check-circle-outline"></span> Summary</div>
+          <div class="nav-tree-item"           id="nav-reh-impex"       onclick="navRehearserImpEx()"><span class="mdi mdi-swap-vertical"></span> Import / Export</div>
+        </div>
+        <div class="nav-tree-head nav-subhead" data-nav-section="s-library" id="nav-library-head" onclick="navTo('s-library')">
+          <span class="nav-icon"><span class="mdi mdi-bookshelf"></span></span>
+          <span class="nav-label">Library</span>
+          <span class="nav-chevron" id="nav-library-chevron" onclick="event.stopPropagation();toggleNavTree('nav-library-tree','nav-library-chevron')"><span class="mdi mdi-chevron-down"></span></span>
+        </div>
+        <div class="nav-tree" id="nav-library-tree">
+          <div class="nav-tree-item is-active" data-library-view="books"      onclick="navLibraryView('books')"><span class="mdi mdi-book-open-page-variant-outline"></span> Books</div>
+          <div class="nav-tree-item"           data-library-view="plays"      onclick="navLibraryView('plays')"><span class="mdi mdi-theater"></span> Theater Plays</div>
+          <div class="nav-tree-item"           data-library-view="characters" onclick="navLibraryView('characters')"><span class="mdi mdi-account-box-multiple-outline"></span> Characters / Cast</div>
+        </div>
       </div>
-      <div class="nav-group-label">Integrations</div>
-      <div class="nav-item" data-nav-section="s-routing"  onclick="navTo('s-routing')">  <span class="nav-icon"><span class="mdi mdi-swap-horizontal"></span></span> App Routing</div>
-      <div class="nav-item" data-nav-section="s-connect"  onclick="navTo('s-connect')">  <span class="nav-icon"><span class="mdi mdi-api"></span></span> Connect Apps</div>
 
-      <div class="nav-item nav-tree-head" data-nav-section="s-settings" id="nav-settings-head" onclick="navTo('s-settings')">
+      <div class="nav-group-head" id="nav-setup-head" onclick="toggleNavTree('nav-setup-tree','nav-setup-chevron')">
-        <span class="nav-icon"><span class="mdi mdi-cog-outline"></span></span>
+        <span class="nav-label">Setup</span>
-        <span class="nav-label">Settings</span>
+        <span class="nav-chevron" id="nav-setup-chevron"><span class="mdi mdi-chevron-down"></span></span>
-        <span class="nav-chevron" id="nav-settings-chevron" onclick="event.stopPropagation();toggleNavTree('nav-settings-tree','nav-settings-chevron')"><span class="mdi mdi-chevron-down"></span></span>
       </div>
-      <div class="nav-tree" id="nav-settings-tree">
+      <div class="nav-tree" id="nav-setup-tree">
-        <div class="nav-tree-item" data-settings-cat="general"     onclick="navSettingsCat('general')"><span class="mdi mdi-tune-vertical"></span> General</div>
+        <div class="nav-tree-item" data-nav-section="s-performance" onclick="navTo('s-performance')"><span class="mdi mdi-speedometer"></span> Benchmark</div>
-
+        <div class="nav-tree-head nav-subhead" data-nav-section="s-llms" id="nav-engines-head" onclick="navTo('s-llms')">
-
+          <span class="nav-icon"><span class="mdi mdi-brain"></span></span>
-        <div class="nav-tree-item" data-settings-cat="payloads"    onclick="navSettingsCat('payloads')"><span class="mdi mdi-code-json"></span> Payloads</div>
+          <span class="nav-label">Engines</span>
-        <div class="nav-tree-item" data-settings-cat="storage"     onclick="navSettingsCat('storage')"><span class="mdi mdi-folder-outline"></span> Storage</div>
+          <span class="nav-chevron" id="nav-engines-chevron" onclick="event.stopPropagation();toggleNavTree('nav-engines-tree','nav-engines-chevron')"><span class="mdi mdi-chevron-down"></span></span>
-        <div class="nav-tree-item" data-settings-cat="apikeys"     onclick="navSettingsCat('apikeys')"><span class="mdi mdi-key-outline"></span> API Keys</div>
+        </div>
-        <div class="nav-tree-item" data-settings-cat="backup"      onclick="navSettingsCat('backup')"><span class="mdi mdi-backup-restore"></span> Backup</div>
+        <div class="nav-tree" id="nav-engines-tree">
-        <div class="nav-tree-item" data-settings-cat="logs"        onclick="navSettingsCat('logs')"><span class="mdi mdi-text-box-outline"></span> Logs</div>
+          <div class="nav-tree-item is-active" data-engines-cat="llm" onclick="navEnginesCat('llm')"><span class="mdi mdi-brain"></span> Language Models</div>
-        <div class="nav-tree-item" data-settings-cat="about"       onclick="navSettingsCat('about')"><span class="mdi mdi-information-outline"></span> About</div>
+          <div class="nav-tree-item"           data-engines-cat="stt" onclick="navEnginesCat('stt')"><span class="mdi mdi-ear-hearing"></span> Speech to Text</div>
+          <div class="nav-tree-item"           data-engines-cat="tts" onclick="navEnginesCat('tts')"><span class="mdi mdi-account-voice"></span> Text to Speech</div>
+        </div>
+        <div class="nav-tree-head nav-subhead" id="nav-integrations-head" onclick="toggleNavTree('nav-integrations-tree','nav-integrations-chevron')">
+          <span class="nav-icon"><span class="mdi mdi-transit-connection-variant"></span></span>
+          <span class="nav-label">Integrations</span>
+          <span class="nav-chevron" id="nav-integrations-chevron"><span class="mdi mdi-chevron-down"></span></span>
+        </div>
+        <div class="nav-tree" id="nav-integrations-tree">
+          <div class="nav-tree-item" data-nav-section="s-routing" onclick="navTo('s-routing')"><span class="mdi mdi-swap-horizontal"></span> App Routing</div>
+          <div class="nav-tree-item" data-nav-section="s-connect" onclick="navTo('s-connect')"><span class="mdi mdi-api"></span> Connect Apps</div>
+        </div>
+        <div class="nav-tree-head nav-subhead" data-nav-section="s-settings" id="nav-settings-head" onclick="navTo('s-settings')">
+          <span class="nav-icon"><span class="mdi mdi-cog-outline"></span></span>
+          <span class="nav-label">Settings</span>
+          <span class="nav-chevron" id="nav-settings-chevron" onclick="event.stopPropagation();toggleNavTree('nav-settings-tree','nav-settings-chevron')"><span class="mdi mdi-chevron-down"></span></span>
+        </div>
+        <div class="nav-tree" id="nav-settings-tree">
+          <div class="nav-tree-item" data-settings-cat="general"  onclick="navSettingsCat('general')"><span class="mdi mdi-tune-vertical"></span> General</div>
+          <div class="nav-tree-item" data-settings-cat="payloads" onclick="navSettingsCat('payloads')"><span class="mdi mdi-code-json"></span> Payloads</div>
+          <div class="nav-tree-item" data-settings-cat="storage"  onclick="navSettingsCat('storage')"><span class="mdi mdi-folder-outline"></span> Storage</div>
+          <div class="nav-tree-item" data-settings-cat="apikeys"  onclick="navSettingsCat('apikeys')"><span class="mdi mdi-key-outline"></span> API Keys</div>
+          <div class="nav-tree-item" data-settings-cat="backup"   onclick="navSettingsCat('backup')"><span class="mdi mdi-backup-restore"></span> Backup</div>
+          <div class="nav-tree-item" data-settings-cat="logs"     onclick="navSettingsCat('logs')"><span class="mdi mdi-text-box-outline"></span> Logs</div>
+          <div class="nav-tree-item" data-settings-cat="about"    onclick="navSettingsCat('about')"><span class="mdi mdi-information-outline"></span> About</div>
+        </div>
       </div>
     </nav>
 

static/nav.js

@@ -69,15 +69,40 @@
   var _treeOpen = {};
   try { _treeOpen = JSON.parse(localStorage.getItem('ttsvc_trees') || '{}'); } catch(_) {}
 
+  // Every collapsible tree must be listed so _applyTreeStates toggles its
+  // open class + chevron. `section` (optional) auto-opens the tree (and its
+  // ancestor trees, handled in _openTreesForSection) when that section opens.
   var TREES = [
-    { tree: 'nav-voices-tree',    chevron: 'nav-voices-chevron',    section: 's-voices'    },
+    { tree: 'nav-voices-tree',       chevron: 'nav-voices-chevron',       section: 's-voices'    },
-    { tree: 'nav-tags-tree',      chevron: 'nav-tags-chevron',      section: 's-voices'    },
+    { tree: 'nav-tags-tree',         chevron: 'nav-tags-chevron'          },
-    { tree: 'nav-engines-tree',   chevron: 'nav-engines-chevron',   section: 's-llms'      },
+    { tree: 'nav-actions-tree',      chevron: 'nav-actions-chevron'       },
-    { tree: 'nav-settings-tree',  chevron: 'nav-settings-chevron',  section: 's-settings'  },
+    { tree: 'nav-speak-tree',        chevron: 'nav-speak-chevron'         },
-    { tree: 'nav-rehearser-tree', chevron: 'nav-rehearser-chevron', section: 's-rehearser' },
+    { tree: 'nav-rehearser-tree',    chevron: 'nav-rehearser-chevron',    section: 's-rehearser' },
-    { tree: 'nav-library-tree',   chevron: 'nav-library-chevron',   section: 's-library'   },
+    { tree: 'nav-library-tree',      chevron: 'nav-library-chevron',      section: 's-library'   },
+    { tree: 'nav-setup-tree',        chevron: 'nav-setup-chevron'         },
+    { tree: 'nav-engines-tree',      chevron: 'nav-engines-chevron',      section: 's-llms'      },
+    { tree: 'nav-integrations-tree', chevron: 'nav-integrations-chevron'  },
+    { tree: 'nav-settings-tree',     chevron: 'nav-settings-chevron',     section: 's-settings'  },
   ];
 
+  // Open the tree(s) for a section: the head's own tree (via TREES.section)
+  // plus every ancestor .nav-tree of the active nav element, so nested items
+  // become visible. Persists once if anything changed.
+  function _openTreesForSection(sectionId) {
+    var changed = false;
+    TREES.forEach(function (t) {
+      if (t.section === sectionId && !_treeOpen[t.tree]) { _treeOpen[t.tree] = true; changed = true; }
+    });
+    var el = document.querySelector('[data-nav-section="' + sectionId + '"]');
+    while (el) {
+      if (el.classList && el.classList.contains('nav-tree') && el.id && !_treeOpen[el.id]) {
+        _treeOpen[el.id] = true; changed = true;
+      }
+      el = el.parentElement;
+    }
+    if (changed) localStorage.setItem('ttsvc_trees', JSON.stringify(_treeOpen));
+  }
+
   function _applyTreeStates() {
     TREES.forEach(function (t) {
       var open = !!_treeOpen[t.tree];
@@ -110,13 +135,9 @@
       item.classList.toggle('active', item.dataset.navSection === sectionId);
     });
 
-    // Navigating to a section auto-opens its tree (but never closes others)
+    // Navigating to a section auto-opens its tree AND every ancestor tree
-    TREES.forEach(function (t) {
+    // (so a nested item is actually visible), but never closes others.
-      if (t.section === sectionId && !_treeOpen[t.tree]) {
+    _openTreesForSection(sectionId);
-        _treeOpen[t.tree] = true;
-        localStorage.setItem('ttsvc_trees', JSON.stringify(_treeOpen));
-      }
-    });
     _applyTreeStates();
 
     // When entering settings, show the active sub-page (default: connections)

static/style.css

@@ -142,6 +142,36 @@ body {
 .nav-tree-item.nav-tree-tag { padding-left: 38px; }
 .nav-tree-item.nav-tree-tag .mdi { font-size: 13px; opacity: .8; }
 .ntc { font-size: 14px; color: var(--subtext); font-weight: 500; }
+
+/* ── Collapsible group headers (Voice Actions · Speak · Setup) ───────────── */
+.nav-group-head {
+  display: flex; align-items: center; gap: 8px; cursor: pointer;
+  padding: 10px 16px 4px; margin-top: 2px;
+  font-size: 10px; font-weight: 800; color: var(--subtext);
+  text-transform: uppercase; letter-spacing: 0.09em;
+  user-select: none;
+}
+.nav-group-head .nav-label { flex: 1; }
+.nav-group-head:hover { color: var(--text); }
+.nav-group-head .nav-chevron { font-size: 13px; }
+
+/* ── Sub-headers nested inside a tree (Tags · Script Rehearsal · Library ·
+      Engines · Integrations · Settings) — look like items, carry a chevron ── */
+.nav-tree .nav-tree-head.nav-subhead {
+  display: flex; align-items: center; gap: 7px; cursor: pointer;
+  padding: 5px 16px 5px 32px; font-size: 12.5px; color: var(--subtext);
+  transition: background .1s, color .1s;
+}
+.nav-tree .nav-tree-head.nav-subhead .nav-icon .mdi,
+.nav-tree .nav-tree-head.nav-subhead > .mdi { font-size: 14px; flex-shrink: 0; }
+.nav-tree .nav-tree-head.nav-subhead .nav-label { flex: 1; }
+.nav-tree .nav-tree-head.nav-subhead:hover { background: var(--panel); color: var(--text); }
+.nav-tree .nav-tree-head.nav-subhead.active { color: var(--accent); font-weight: 700; }
+
+/* Nested trees indent one extra level per depth */
+.nav-tree .nav-tree .nav-tree-item,
+.nav-tree .nav-tree .nav-tree-head.nav-subhead { padding-left: 44px; }
+.nav-tree .nav-tree .nav-tree .nav-tree-item { padding-left: 56px; }
 .nav-tree-item.is-active .ntc { color: var(--accent); }
 
 .nav-item {