feat: allow custom layouts when creating tours

Courses without scraped layouts can now be used in tours by entering
a layout name and par manually. The layout is saved to the database
for reuse. All courses are shown in the dropdown, not just those with
existing layouts.

public/css/tours.css

@@ -44,6 +44,16 @@
     flex: 1;
 }
 
+.manual-layout {
+    display: flex;
+    gap: 6px;
+    align-items: center;
+}
+
+.manual-layout input {
+    flex: 1;
+}
+
 .btn-secondary {
     background: var(--surface-2);
     color: var(--text-secondary);
@@ -178,10 +188,15 @@
         flex-direction: column;
     }
 
-    .course-entry select {
+    .course-entry select,
+    .manual-layout {
         width: 100%;
     }
 
+    .manual-layout {
+        flex-direction: row;
+    }
+
     .tour-meta {
         gap: 8px;
     }