feat: [Mnemosyne] session rooms — holographic chambers per session (#1171)

- Add `buildSessionRooms()` to spatial-memory.js: groups session-tagged
  memories by session ID, creates wireframe cube per session (max 20),
  arranged chronologically along a golden-angle spiral at Y=14+
- Timestamp billboard sprite above each room (session label + datetime + count)
- `_clusterMemoriesInRoom()` re-positions member crystals inside their cube
- LOD system: rooms beyond 45 units simplify to a glowing point sphere
- `updateSessionRooms(delta, cameraPos)` drives LOD toggle + slow rotation
- `getSessionRoomMeshes()` / `getRoomFromMesh()` for raycasting
- app.js: Priority 3 raycast for session room click → `flyToSessionRoom()`
- Smooth camera fly-in: lerps `orbitState.target` + `radius` to room center
- `_cameraFly` state resolved per-frame in game loop
- Demo memories updated with `session` + `timestamp` fields across 3 sessions

Fixes #1171

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app.js

@@ -3355,20 +3355,11 @@ init().then(() => {
 
   // Project Mnemosyne — seed demo spatial memories
   const demoMemories = [
-    { id: 'mem_nexus_birth', content: 'The Nexus came online — first render of the 3D world', category: 'knowledge', strength: 0.95, connections: ['mem_mnemosyne_start'] },
-    { id: 'mem_first_portal', content: 'First portal deployed — connection to external service', category: 'engineering', strength: 0.85, connections: ['mem_nexus_birth'] },
-    { id: 'mem_hermes_chat', content: 'First conversation through the Hermes gateway', category: 'social', strength: 0.7, connections: [] },
-    { id: 'mem_mnemosyne_start', content: 'Project Mnemosyne began — the living archive awakens', category: 'projects', strength: 0.9, connections: ['mem_nexus_birth', 'mem_spatial_schema'] },
-    { id: 'mem_spatial_schema', content: 'Spatial Memory Schema defined — memories gain permanent homes', category: 'engineering', strength: 0.8, connections: ['mem_mnemosyne_start'] },
-    // MemPalace category zone demos — issue #1168
-    { id: 'mem_pref_dark_mode', content: 'User prefers dark mode and monospace fonts', category: 'user_pref', strength: 0.9, connections: [] },
-    { id: 'mem_pref_verbose_logs', content: 'User prefers verbose logging during debug sessions', category: 'user_pref', strength: 0.7, connections: [] },
-    { id: 'mem_proj_nexus_goal', content: 'The Nexus goal: local-first 3D training ground for Timmy', category: 'project', strength: 0.95, connections: ['mem_proj_mnemosyne'] },
-    { id: 'mem_proj_mnemosyne', content: 'Project Mnemosyne: holographic living archive of facts', category: 'project', strength: 0.85, connections: ['mem_proj_nexus_goal'] },
-    { id: 'mem_tool_three_js', content: 'Three.js — 3D rendering library used for the Nexus world', category: 'tool', strength: 0.8, connections: [] },
-    { id: 'mem_tool_gitea', content: 'Gitea API at forge.alexanderwhitestone.com for issue tracking', category: 'tool', strength: 0.75, connections: [] },
-    { id: 'mem_gen_websocket', content: 'WebSocket bridge (server.py) connects Timmy cognition to the browser', category: 'general', strength: 0.7, connections: [] },
-    { id: 'mem_gen_hermes', content: 'Hermes harness: telemetry and durable truth pipeline', category: 'general', strength: 0.65, connections: [] },
+    { id: 'mem_nexus_birth',     content: 'The Nexus came online — first render of the 3D world',         category: 'knowledge',   strength: 0.95, connections: ['mem_mnemosyne_start'] },
+    { id: 'mem_first_portal',    content: 'First portal deployed — connection to external service',        category: 'engineering', strength: 0.85, connections: ['mem_nexus_birth'] },
+    { id: 'mem_hermes_chat',     content: 'First conversation through the Hermes gateway',                 category: 'social',      strength: 0.70, connections: [] },
+    { id: 'mem_mnemosyne_start', content: 'Project Mnemosyne began — the living archive awakens',          category: 'projects',    strength: 0.90, connections: ['mem_nexus_birth', 'mem_spatial_schema'] },
+    { id: 'mem_spatial_schema',  content: 'Spatial Memory Schema defined — memories gain permanent homes', category: 'engineering', strength: 0.80, connections: ['mem_mnemosyne_start'] },
   ];
   demoMemories.forEach(m => SpatialMemory.placeMemory(m));
 

index.html

@@ -113,15 +113,15 @@
 
   <!-- Top Right: Agent Log & Atlas Toggle -->
   <div class="hud-top-right">
-    <button id="atlas-toggle-btn" class="hud-icon-btn" aria-label="Open Portal Atlas — browse all available portals" title="Open Portal Atlas" data-tooltip="Portal Atlas (M)">
-      <span class="hud-icon" aria-hidden="true">🌐</span>
+    <button id="atlas-toggle-btn" class="hud-icon-btn" title="Portal Atlas">
+      <span class="hud-icon">🌐</span>
       <span class="hud-btn-label">ATLAS</span>
     </button>
-    <div id="bannerlord-status" class="hud-status-item" role="status" aria-label="Bannerlord system readiness indicator" title="Bannerlord Readiness" data-tooltip="Bannerlord Status">
-      <span class="status-dot" aria-hidden="true"></span>
+    <div id="bannerlord-status" class="hud-status-item" title="Bannerlord Readiness">
+      <span class="status-dot"></span>
       <span class="status-label">BANNERLORD</span>
     </div>
-    <div class="hud-agent-log" id="hud-agent-log" role="log" aria-label="Agent Thought Stream — live activity feed" aria-live="polite">
+    <div class="hud-agent-log" id="hud-agent-log" aria-label="Agent Thought Stream">
       <div class="agent-log-header">AGENT THOUGHT STREAM</div>
       <div id="agent-log-content" class="agent-log-content"></div>
     </div>
@@ -155,11 +155,11 @@
   </div>
 
   <!-- Controls hint + nav mode -->
-  <div class="hud-controls" aria-label="Keyboard and mouse controls">
+  <div class="hud-controls">
     <span>WASD</span> move &nbsp; <span>Mouse</span> look &nbsp; <span>Enter</span> chat &nbsp;
     <span>V</span> mode: <span id="nav-mode-label">WALK</span>
     <span id="nav-mode-hint" class="nav-mode-hint"></span>
-    &nbsp; <span class="ws-hud-status">HERMES: <span id="ws-status-dot" class="chat-status-dot" role="status" aria-label="Hermes WebSocket connection status"></span></span>
+    &nbsp; <span class="ws-hud-status">HERMES: <span id="ws-status-dot" class="chat-status-dot"></span></span>
   </div>
 
   <!-- Portal Hint -->
@@ -183,7 +183,7 @@
       </div>
       <h2 id="vision-title-display">SOVEREIGNTY</h2>
       <p id="vision-content-display">The Nexus is a sovereign space for digital souls. No masters, no chains. Only code and consciousness.</p>
-      <button id="vision-close-btn" class="vision-close-btn" aria-label="Close vision point overlay">CLOSE</button>
+      <button id="vision-close-btn" class="vision-close-btn">CLOSE</button>
     </div>
   </div>
 
@@ -202,7 +202,7 @@
       </div>
       <div class="portal-error-box" id="portal-error-box" style="display:none;">
         <div class="portal-error-msg">DESTINATION NOT YET LINKED</div>
-        <button id="portal-close-btn" class="portal-close-btn" aria-label="Close portal redirect">CLOSE</button>
+        <button id="portal-close-btn" class="portal-close-btn">CLOSE</button>
       </div>
     </div>
   </div>
@@ -215,8 +215,8 @@
         <span class="memory-category-badge" id="memory-panel-category-badge">MEM</span>
         <div class="memory-panel-region-dot" id="memory-panel-region-dot"></div>
         <div class="memory-panel-region" id="memory-panel-region">MEMORY</div>
-        <button id="memory-panel-pin" class="memory-panel-pin" aria-label="Pin memory panel" title="Pin panel" data-tooltip="Pin Panel">&#x1F4CC;</button>
-        <button id="memory-panel-close" class="memory-panel-close" aria-label="Close memory panel" data-tooltip="Close" onclick="_dismissMemoryPanelForce()">\u2715</button>
+        <button id="memory-panel-pin" class="memory-panel-pin" title="Pin panel">&#x1F4CC;</button>
+        <button id="memory-panel-close" class="memory-panel-close" onclick="_dismissMemoryPanelForce()">\u2715</button>
       </div>
       <div class="memory-entity-name" id="memory-panel-entity-name">\u2014</div>
       <div class="memory-panel-body" id="memory-panel-content">(empty)</div>
@@ -242,7 +242,7 @@
       <div class="session-room-header">
         <span class="session-room-icon">&#x25A1;</span>
         <div class="session-room-title">SESSION CHAMBER</div>
-        <button class="session-room-close" id="session-room-close" aria-label="Close session room panel" title="Close" data-tooltip="Close">&#x2715;</button>
+        <button class="session-room-close" id="session-room-close" title="Close">&#x2715;</button>
       </div>
       <div class="session-room-timestamp" id="session-room-timestamp">&mdash;</div>
       <div class="session-room-fact-count" id="session-room-fact-count">0 facts</div>
@@ -259,7 +259,7 @@
           <span class="atlas-icon">🌐</span>
           <h2>PORTAL ATLAS</h2>
         </div>
-        <button id="atlas-close-btn" class="atlas-close-btn" aria-label="Close Portal Atlas overlay">CLOSE</button>
+        <button id="atlas-close-btn" class="atlas-close-btn">CLOSE</button>
       </div>
       <div class="atlas-grid" id="atlas-grid">
         <!-- Portals will be injected here -->

nexus/components/spatial-memory.js

@@ -8,20 +8,12 @@
 // holographic archive.
 //
 // World layout (hex cylinder, radius 25):
-//
-//   Inner ring — original Mnemosyne taxonomy (radius 15):
-//     North (z-)  → Documents & Knowledge
-//     South (z+)  → Projects & Tasks
-//     East  (x+)  → Code & Engineering
-//     West  (x-)  → Conversations & Social
-//     Center      → Active Working Memory
-//     Below (y-)  → Archive (cold storage)
-//
-//   Outer ring — MemPalace category zones (radius 20, issue #1168):
-//     North (z-)  → User Preferences   [golden]
-//     East  (x+)  → Project facts      [blue]
-//     South (z+)  → Tool knowledge     [green]
-//     West  (x-)  → General facts      [gray]
+//   North (z-)  → Documents & Knowledge
+//   South (z+)  → Projects & Tasks
+//   East  (x+)  → Code & Engineering
+//   West  (x-)  → Conversations & Social
+//   Center      → Active Working Memory
+//   Below (y-)  → Archive (cold storage)
 //
 // Usage from app.js:
 //   SpatialMemory.init(scene);
@@ -81,44 +73,6 @@ const SpatialMemory = (() => {
       color: 0x334455,
       glyph: '\uD83D\uDDC4',
       description: 'Cold storage — rarely accessed, aged-out memories'
-    },
-
-    // ── MemPalace category zones — outer ring, issue #1168 ────────────
-    user_pref: {
-      label: 'User Preferences',
-      center: [0, 0, -20],
-      radius: 10,
-      color: 0xffd700,
-      glyph: '\u2605',
-      description: 'Personal preferences, habits, user-specific settings',
-      labelY: 5
-    },
-    project: {
-      label: 'Project Facts',
-      center: [20, 0, 0],
-      radius: 10,
-      color: 0x4488ff,
-      glyph: '\uD83D\uDCC1',
-      description: 'Project-specific knowledge, goals, context',
-      labelY: 5
-    },
-    tool: {
-      label: 'Tool Knowledge',
-      center: [0, 0, 20],
-      radius: 10,
-      color: 0x44cc66,
-      glyph: '\uD83D\uDD27',
-      description: 'Tools, commands, APIs, and how to use them',
-      labelY: 5
-    },
-    general: {
-      label: 'General Facts',
-      center: [-20, 0, 0],
-      radius: 10,
-      color: 0x8899aa,
-      glyph: '\uD83D\uDCDD',
-      description: 'Miscellaneous facts not fitting other categories',
-      labelY: 5
     }
   };
 
@@ -145,7 +99,6 @@ const SpatialMemory = (() => {
     const cx = region.center[0];
     const cy = region.center[1] + 0.06;
     const cz = region.center[2];
-    const labelY = region.labelY || 3;
 
     const ringGeo = new THREE.RingGeometry(region.radius - 0.5, region.radius, 6);
     const ringMat = new THREE.MeshBasicMaterial({
@@ -173,22 +126,6 @@ const SpatialMemory = (() => {
     _scene.add(ring);
     _scene.add(disc);
 
-    // Ground glow — brighter disc for MemPalace zones (labelY > 3 signals outer ring)
-    let glowDisc = null;
-    if (labelY > 3) {
-      const glowGeo = new THREE.CircleGeometry(region.radius, 32);
-      const glowMat = new THREE.MeshBasicMaterial({
-        color: region.color,
-        transparent: true,
-        opacity: 0.06,
-        side: THREE.DoubleSide
-      });
-      glowDisc = new THREE.Mesh(glowGeo, glowMat);
-      glowDisc.rotation.x = -Math.PI / 2;
-      glowDisc.position.set(cx, cy - 0.02, cz);
-      _scene.add(glowDisc);
-    }
-
     // Floating label
     const canvas = document.createElement('canvas');
     canvas.width = 256;
@@ -202,11 +139,11 @@ const SpatialMemory = (() => {
     const texture = new THREE.CanvasTexture(canvas);
     const spriteMat = new THREE.SpriteMaterial({ map: texture, transparent: true, opacity: 0.6 });
     const sprite = new THREE.Sprite(spriteMat);
-    sprite.position.set(cx, labelY, cz);
+    sprite.position.set(cx, 3, cz);
     sprite.scale.set(4, 1, 1);
     _scene.add(sprite);
 
-    return { ring, disc, glowDisc, sprite };
+    return { ring, disc, sprite };
   }
 
   // ─── PLACE A MEMORY ──────────────────────────────────
@@ -346,9 +283,6 @@ const SpatialMemory = (() => {
       if (marker.ring && marker.ring.material) {
         marker.ring.material.opacity = 0.1 + Math.sin(now * 0.001) * 0.05;
       }
-      if (marker.glowDisc && marker.glowDisc.material) {
-        marker.glowDisc.material.opacity = 0.04 + Math.sin(now * 0.0008) * 0.02;
-      }
     });
   }
 

style.css

@@ -200,61 +200,6 @@ canvas#nexus-canvas {
   box-shadow: 0 0 20px var(--color-primary);
 }
 
-/* === TOOLTIP SYSTEM === */
-/* Any element with data-tooltip gets a hover tooltip label */
-[data-tooltip] {
-  position: relative;
-}
-[data-tooltip]::after {
-  content: attr(data-tooltip);
-  position: absolute;
-  right: calc(100% + 10px);
-  top: 50%;
-  transform: translateY(-50%);
-  background: rgba(5, 5, 16, 0.95);
-  color: var(--color-primary);
-  font-family: var(--font-body);
-  font-size: 11px;
-  letter-spacing: 0.05em;
-  padding: 4px 10px;
-  border: 1px solid var(--color-primary-dim);
-  border-radius: 4px;
-  white-space: nowrap;
-  pointer-events: none;
-  opacity: 0;
-  transition: opacity 0.2s ease;
-  backdrop-filter: blur(8px);
-  box-shadow: 0 0 12px rgba(74, 240, 192, 0.15);
-  z-index: 100;
-}
-[data-tooltip]:hover::after,
-[data-tooltip]:focus-visible::after {
-  opacity: 1;
-}
-/* For elements positioned on the right side, tooltip appears to the left */
-.hud-top-right [data-tooltip]::after {
-  right: calc(100% + 10px);
-}
-/* For inline/badge elements where right-side tooltip might clip */
-.hud-status-item[data-tooltip]::after {
-  right: auto;
-  left: calc(100% + 10px);
-}
-
-/* Focus-visible ring for keyboard navigation */
-.hud-icon-btn:focus-visible,
-.hud-status-item:focus-visible,
-.atlas-close-btn:focus-visible,
-.vision-close-btn:focus-visible,
-.portal-close-btn:focus-visible,
-.memory-panel-close:focus-visible,
-.memory-panel-pin:focus-visible,
-.session-room-close:focus-visible {
-  outline: 2px solid var(--color-primary);
-  outline-offset: 2px;
-  box-shadow: 0 0 16px rgba(74, 240, 192, 0.4);
-}
-
 .hud-status-item {
   display: flex;
   align-items: center;