Add repository link to header and fix Options menu positioning

- Add gear icon (⚙) repository link next to version in header
- Position Options menu below Night Mode button using absolute positioning
- Rename 'Display Options' to 'Options' for brevity
- Repository link points to https://kode.naiv.no/olemd/skyview
- Options menu now at top: 320px, right: 10px to appear below map controls

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/static/css/style.css

@@ -195,8 +195,8 @@ body {
 
 .display-options {
     position: absolute;
-    top: 10px;
-    left: 10px;
+    top: 320px;
+    right: 10px;
     z-index: 1000;
     background: rgba(45, 45, 45, 0.95);
     border: 1px solid #404040;
@@ -472,6 +472,22 @@ body {
     margin-left: 8px;
 }
 
+/* Repository Link */
+.repo-link {
+    color: #888;
+    text-decoration: none;
+    font-size: 0.7em;
+    margin-left: 6px;
+    opacity: 0.6;
+    transition: opacity 0.2s ease, color 0.2s ease;
+}
+
+.repo-link:hover {
+    color: #4a9eff;
+    opacity: 1;
+    text-decoration: none;
+}
+
 /* Collapsible Sections */
 .collapsible-header {
     cursor: pointer;