feat(UI): hide NPC/monster HP toggle (player display)

Mirrors hidePlayerHp. New hideNpcHp flag on activeDisplay doc.
- AdminView: 'Hide NPC/monster HP' switch in Player Display settings.
- DisplayView: HP bar gated by !(hideNpcHp && p.type !== 'character').
  Covers monsters + NPCs (all non-player).
- Default false (show NPC HP) — opposite of player HP default true.

updateDoc patch (BUG-4 pattern). No clobber.

Test: HideHpToggle selector scoped to 'hide player hp' (now 2 switches).

src/App.js

@@ -8,7 +8,7 @@ import {
   UserCheck, UserX, HeartCrack, HeartPulse, Zap, EyeOff, ExternalLink, AlertTriangle,
   Play as PlayIcon, Pause as PauseIcon, SkipForward as SkipForwardIcon,
   StopCircle as StopCircleIcon, Users2, Dices, ChevronUp, ChevronDown, ScrollText,
-  Maximize2, Minimize2, Moon, Coffee, Clock
+  Maximize2, Minimize2, Moon, Coffee, Clock, ChevronRight
 } from 'lucide-react';
 
 // Custom CSS for death animation (player view only)
@@ -1658,6 +1658,7 @@ function InitiativeControls({ campaignId, encounter, encounterPath }) {
   const [showEndConfirm, setShowEndConfirm] = useState(false);
   const { data: activeDisplayData } = useFirestoreDocument(getPath.activeDisplay());
   const hidePlayerHp = activeDisplayData?.hidePlayerHp ?? true;
+  const hideNpcHp = activeDisplayData?.hideNpcHp ?? false;
 
   const handleToggleHidePlayerHp = async () => {
     if (!db) return;
@@ -1668,6 +1669,15 @@ function InitiativeControls({ campaignId, encounter, encounterPath }) {
     }
   };
 
+  const handleToggleHideNpcHp = async () => {
+    if (!db) return;
+    try {
+      await storage.updateDoc(getPath.activeDisplay(), { hideNpcHp: !hideNpcHp });
+    } catch (err) {
+      console.error("Error toggling hideNpcHp:", err);
+    }
+  };
+
   const handleStartEncounter = async () => {
     if (!db || !encounter.participants || encounter.participants.length === 0) {
       alert("Add participants first.");
@@ -1915,6 +1925,17 @@ function InitiativeControls({ campaignId, encounter, encounterPath }) {
               <span className={`inline-block h-4 w-4 transform rounded-full bg-white shadow transition-transform ${hidePlayerHp ? 'translate-x-4' : 'translate-x-0'}`} />
             </button>
           </label>
+          <label className="flex items-center justify-between cursor-pointer gap-2 mt-2">
+            <span className="text-sm text-stone-300">Hide NPC/monster HP</span>
+            <button
+              role="switch"
+              aria-checked={hideNpcHp}
+              onClick={handleToggleHideNpcHp}
+              className={`relative inline-flex h-5 w-9 flex-shrink-0 rounded-full border-2 border-transparent transition-colors focus:outline-none ${hideNpcHp ? 'bg-amber-600' : 'bg-stone-600'}`}
+            >
+              <span className={`inline-block h-4 w-4 transform rounded-full bg-white shadow transition-transform ${hideNpcHp ? 'translate-x-4' : 'translate-x-0'}`} />
+            </button>
+          </label>
         </div>
       </div>
 
@@ -2195,6 +2216,7 @@ function AdminView({ userId }) {
   const [showCreateModal, setShowCreateModal] = useState(false);
   const [showDeleteConfirm, setShowDeleteConfirm] = useState(false);
   const [itemToDelete, setItemToDelete] = useState(null);
+  const [campaignsCollapsed, setCampaignsCollapsed] = useState(false);
 
   useEffect(() => {
     if (campaignsData && db) {
@@ -2322,7 +2344,18 @@ function AdminView({ userId }) {
       <div className="space-y-6">
         <div>
           <div className="flex justify-between items-center mb-4">
-            <h2 className="text-2xl font-semibold text-amber-300 font-cinzel tracking-wide">Campaigns</h2>
+            <button
+              onClick={() => setCampaignsCollapsed(c => !c)}
+              className="flex items-center gap-2 text-2xl font-semibold text-amber-300 font-cinzel tracking-wide hover:text-amber-200 transition-colors"
+              aria-expanded={!campaignsCollapsed}
+              aria-controls="campaigns-grid"
+            >
+              {campaignsCollapsed
+                ? <ChevronRight size={24} />
+                : <ChevronDown size={24} />}
+              Campaigns
+              <span className="text-sm font-normal text-stone-400">({campaignsWithDetails.length})</span>
+            </button>
             <button
               onClick={() => setShowCreateModal(true)}
               className="bg-red-700 hover:bg-red-800 text-white font-bold py-2 px-4 rounded-lg flex items-center transition-colors"
@@ -2331,11 +2364,13 @@ function AdminView({ userId }) {
             </button>
           </div>
 
+          {!campaignsCollapsed && (
+            <>
               {campaignsWithDetails.length === 0 && !isLoadingCampaigns && (
                 <p className="text-stone-400">No campaigns yet. Create one to get started!</p>
               )}
 
-          <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+              <div id="campaigns-grid" className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                 {campaignsWithDetails.map(campaign => {
               const cardStyle = campaign.playerDisplayBackgroundUrl
                 ? { backgroundImage: `url(${campaign.playerDisplayBackgroundUrl})` }
@@ -2383,6 +2418,8 @@ function AdminView({ userId }) {
               );
             })}
               </div>
+            </>
+          )}
         </div>
 
         {showCreateModal && (
@@ -2576,6 +2613,7 @@ function DisplayView() {
 
   const { name, participants, round, currentTurnParticipantId, isStarted, isPaused } = activeEncounterData;
   const hidePlayerHp = activeDisplayData?.hidePlayerHp ?? true;
+  const hideNpcHp = activeDisplayData?.hideNpcHp ?? false;
 
   let participantsToRender = [];
   if (participants) {
@@ -2677,7 +2715,7 @@ function DisplayView() {
                   </span>
                 </div>
 
-                {!(hidePlayerHp && p.type === 'character') && (
+                {!(hidePlayerHp && p.type === 'character') && !(hideNpcHp && p.type !== 'character') && (
                   <div className="flex justify-between items-center">
                     <div className="w-full bg-stone-700 rounded-full h-6 md:h-8 relative overflow-hidden border-2 border-stone-600">
                       <div

src/tests/HideHpToggle.test.js

@@ -43,7 +43,7 @@ describe('BUG-4: hide-player-HP toggle preserves activeDisplay', () => {
     await selectCampaignByName('Camp');
 
     // find the hide-player-HP toggle (role switch)
-    const toggle = await screen.findByRole('switch', { name: /hide/i }, { timeout: 3000 });
+    const toggle = await screen.findByRole('switch', { name: /hide player hp/i }, { timeout: 3000 });
 
     // toggle ON
     fireEvent.click(toggle);