chat history with the NPC modal

public_web/static/css/play.css

@@ -1033,7 +1033,7 @@
 .modal-content--sm { max-width: 400px; }
 .modal-content--md { max-width: 500px; }
 .modal-content--lg { max-width: 700px; }
-.modal-content--xl { max-width: 900px; }
+.modal-content--xl { max-width: 1000px; }  /* Expanded for 3-column NPC chat */
 
 @keyframes slideUp {
     from { transform: translateY(20px); opacity: 0; }
@@ -1434,6 +1434,14 @@
     min-height: 400px;
 }
 
+/* 3-column layout for chat modal with history sidebar */
+.npc-modal-body--three-col {
+    display: grid;
+    grid-template-columns: 200px 1fr 280px;  /* Profile | Chat | History */
+    gap: 1rem;
+    max-height: 70vh;
+}
+
 /* NPC Profile (Left Column) */
 .npc-profile {
     width: 200px;
@@ -1587,18 +1595,20 @@
     font-weight: 600;
 }
 
-/* NPC Conversation (Right Column) */
+/* NPC Conversation (Middle Column) */
 .npc-conversation {
     flex: 1;
     display: flex;
     flex-direction: column;
     min-width: 0;
+    min-height: 0;  /* Important for grid child to enable scrolling */
 }
 
 .npc-conversation .chat-history {
     flex: 1;
     min-height: 250px;
-    max-height: none;
+    max-height: 500px;  /* Set max height to enable scrolling */
+    overflow-y: auto;  /* Enable vertical scroll */
 }
 
 .chat-empty-state {
@@ -1608,6 +1618,87 @@
     font-style: italic;
 }
 
+/* ===== NPC CHAT HISTORY SIDEBAR ===== */
+.npc-history-panel {
+    display: flex;
+    flex-direction: column;
+    border-left: 1px solid var(--play-border);
+    padding-left: 1rem;
+    overflow-y: auto;
+    max-height: 70vh;
+}
+
+.history-header {
+    font-size: 0.875rem;
+    font-weight: 600;
+    color: var(--text-muted);
+    text-transform: uppercase;
+    margin-bottom: 0.75rem;
+    letter-spacing: 0.05em;
+}
+
+.history-list {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+/* Compact history cards */
+.history-card {
+    background: var(--bg-secondary);
+    border: 1px solid var(--play-border);
+    border-radius: 4px;
+    padding: 0.5rem;
+    font-size: 0.8rem;
+    transition: background 0.2s;
+}
+
+.history-card:hover {
+    background: var(--bg-tertiary);
+}
+
+.history-timestamp {
+    font-size: 0.7rem;
+    color: var(--text-muted);
+    margin-bottom: 0.25rem;
+    font-style: italic;
+}
+
+.history-player {
+    color: var(--text-primary);
+    margin-bottom: 0.125rem;
+    line-height: 1.4;
+}
+
+.history-player strong {
+    color: var(--accent-gold);
+}
+
+.history-npc {
+    color: var(--text-primary);
+    line-height: 1.4;
+}
+
+.history-npc strong {
+    color: var(--accent-gold);
+}
+
+.history-empty {
+    text-align: center;
+    color: var(--text-muted);
+    font-size: 0.875rem;
+    padding: 2rem 0;
+    font-style: italic;
+}
+
+.loading-state-small {
+    text-align: center;
+    color: var(--text-muted);
+    font-size: 0.875rem;
+    padding: 1rem 0;
+    font-style: italic;
+}
+
 /* Responsive NPC Modal */
 @media (max-width: 700px) {
     .npc-modal-body {
@@ -1650,6 +1741,31 @@
     }
 }
 
+/* Responsive: 3-column modal stacks on smaller screens */
+@media (max-width: 1024px) {
+    .npc-modal-body--three-col {
+        grid-template-columns: 1fr;  /* Single column */
+        grid-template-rows: auto 1fr auto;
+    }
+
+    .npc-profile {
+        order: 1;
+    }
+
+    .npc-conversation {
+        order: 2;
+    }
+
+    .npc-history-panel {
+        order: 3;
+        border-left: none;
+        border-top: 1px solid var(--play-border);
+        padding-left: 0;
+        padding-top: 1rem;
+        max-height: 200px;  /* Shorter on mobile */
+    }
+}
+
 /* ===== UTILITY CLASSES FOR PLAY SCREEN ===== */
 .play-hidden {
     display: none !important;