Move New/Load/Save below host input; double transport button size

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SH2D4LRuCnhLSzoYerAfJX

web/style.css

@@ -63,12 +63,21 @@ button:disabled { opacity: 0.4; cursor: default; }
 
 header#connection-bar {
     display: flex;
-    align-items: center;
-    flex-wrap: wrap;
-    gap: 1em;
+    flex-direction: column;
+    gap: 0.4em;
     padding: 0.6em 0;
     border-bottom: 1px solid var(--border);
 }
+#conn-row {
+    display: flex;
+    align-items: center;
+    gap: 1em;
+}
+#file-row {
+    display: flex;
+    align-items: center;
+    gap: 0.4em;
+}
 #host { width: 18em; }
 
 .status-connected    { color: var(--green); font-weight: bold; }
@@ -118,11 +127,11 @@ header#connection-bar {
 /* --- Transport buttons (circular, coloured) --- */
 
 .transport-btn {
-    width: 38px;
-    height: 38px;
+    width: 76px;
+    height: 76px;
     border-radius: 50%;
     border: none;
-    font-size: 15px;
+    font-size: 30px;
     cursor: pointer;
     display: inline-flex;
     align-items: center;