[Security] Address critical flaw in console rendering that allowed arbitrary command execution

public/themes/pterodactyl/css/pterodactyl.css

@@ -311,3 +311,90 @@ input.form-autocomplete-stop[readonly] {
     background: white;
     box-shadow: none !important;
 }
+
+#terminal {
+    font-family: monospace;
+    color: #aaa;
+    background: #000;
+    font-size: 12px;
+    line-height: 14px;
+    padding: 10px 10px 0;
+    box-sizing: border-box;
+    min-height: 30px;
+    max-height: 500px;
+    overflow-y: auto;
+    overflow-x: hidden;
+    border-radius: 5px 5px 0 0;
+}
+
+#terminal > .cmd {
+    padding: 1px 0;
+}
+
+@keyframes blinky {
+    0% {
+        background: transparent;
+    }
+    100% {
+        background: rgba(170, 170, 170, 0.9);
+    }
+}
+
+@-webkit-keyframes blinky {
+    0% {
+        background: transparent;
+    }
+    100% {
+        background: rgba(170, 170, 170, 0.9);
+    }
+}
+
+#terminal_input {
+    width: 100%;
+    background: #000;
+    border-radius: 0 0 5px 5px;
+    padding: 5px 10px;
+}
+
+.terminal_input--input {
+    height: 0;
+    width: 0;
+    position: absolute;
+    top: -20px;
+}
+
+.terminal_input--text, .terminal_input--prompt {
+    line-height: 14px;
+    width: 100%;
+    vertical-align: middle;
+    font-size: 12px;
+    font-family: monospace;
+    margin-bottom: 0;
+    background: transparent;
+    color: #aaa;
+}
+
+.terminal_input--text:before, .terminal_input--text:after {
+    content: "";
+    display: inline-block;
+    width: 7px;
+    height: 14px;
+    margin: 0 0 -12px -6px;
+    vertical-align: middle;
+}
+
+.terminal_input--text:after {
+    position: relative;
+    bottom: 8px;
+    left: 8px;
+    background: #ff00;
+    animation: blinky 0.6s linear infinite alternate;
+    -webkit-animation: blinky 0.6s linear infinite alternate;
+}
+
+.terminal_input--input {
+    color: transparent;
+    background-color: transparent;
+    border: 0;
+    outline: none;
+}