feat: fixed-height near-white input, terse-answer system prompt

public/index.html

@@ -72,16 +72,21 @@
             width: 100%;
             border: none;
             background: transparent;
-            color: #555;
+            color: #f2f2f2;
             font-size: 14px;
             outline: none;
             resize: none;
+            height: 28px;
+            max-height: 28px;
             min-height: 28px;
             line-height: 1.5;
             padding: 4px 0;
+            overflow: hidden;
+            white-space: nowrap;
             font-family: proxima_nova_rgregular, Arial, sans-serif;
+            caret-color: #c4c4c4;
         }
-        #chat-input::placeholder { color: #d0d0d0; }
+        #chat-input::placeholder { color: transparent; }
 
         /* Slight override to keep well-lg radius 0 like real portal */
         .well-lg { border-radius: 0; }
@@ -356,11 +361,6 @@
     }, 50);
   });
 
-  // Auto-grow textarea
-  inputEl.addEventListener('input', () => {
-    inputEl.style.height = 'auto';
-    inputEl.style.height = inputEl.scrollHeight + 'px';
-  });
 </script>
 </body>
 </html>