Extract inline CSS/JS, add EJS templates with shared layout

- Extract CSS into public/css/{shared,players,courses}.css
- Extract JS into public/js/{chart,tooltips,progress,players,courses}.js
- Consolidate 5 duplicated tooltip blocks into setupTooltip() helper
- Add EJS view engine with layout partial and nav partial
- Convert HTML pages to EJS templates (index.ejs, courses.ejs)
- Add /courses route with redirect from /courses.html
- Remove old monolithic HTML files (1478 + 612 lines)

public/css/shared.css

@@ -0,0 +1,163 @@
+/* Shared styles for PDGA Ratings app */
+
+body {
+    font-family: Arial, sans-serif;
+    margin: 0;
+    padding: 20px;
+    background-color: #f5f5f5;
+}
+
+@media (max-width: 768px) {
+    body {
+        padding: 10px;
+    }
+}
+
+.container {
+    max-width: 800px;
+    margin: 0 auto;
+    background: white;
+    padding: 30px;
+    border-radius: 8px;
+    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+    overflow-x: auto;
+}
+
+@media (max-width: 768px) {
+    .container {
+        padding: 15px;
+        border-radius: 0;
+        box-shadow: none;
+    }
+}
+
+h1 {
+    color: #333;
+    text-align: center;
+    margin-bottom: 30px;
+}
+
+@media (max-width: 768px) {
+    h1 {
+        font-size: 24px;
+        margin-bottom: 20px;
+    }
+}
+
+.loading {
+    text-align: center;
+    padding: 20px;
+    font-size: 18px;
+    color: #666;
+}
+
+table {
+    width: 100%;
+    border-collapse: collapse;
+    margin-top: 20px;
+    font-size: 14px;
+}
+
+th, td {
+    padding: 12px;
+    text-align: left;
+    border-bottom: 1px solid #ddd;
+}
+
+@media (max-width: 768px) {
+    table {
+        font-size: 12px;
+    }
+    th, td {
+        padding: 8px 4px;
+    }
+    .mobile-hide {
+        display: none;
+    }
+}
+
+th {
+    background-color: #f8f9fa;
+    font-weight: bold;
+    color: #495057;
+}
+
+tr:hover {
+    background-color: #f5f5f5;
+}
+
+.expandable-row {
+    cursor: pointer;
+}
+
+.expandable-row:hover {
+    background-color: #e3f2fd;
+}
+
+.expanded-content {
+    display: none;
+    background-color: #f8f9fa;
+    border-top: 2px solid #007bff;
+}
+
+.expanded-content td {
+    padding: 20px;
+}
+
+a {
+    color: #007bff;
+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}
+
+.btn {
+    padding: 8px 16px;
+    background-color: #007bff;
+    color: white;
+    border: none;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 14px;
+}
+
+.btn:hover {
+    background-color: #0056b3;
+}
+
+.btn:disabled {
+    background-color: #6c757d;
+    cursor: not-allowed;
+}
+
+.refresh-icon {
+    cursor: pointer;
+    opacity: 0.6;
+    margin-left: 8px;
+    font-size: 13px;
+    color: #6c757d;
+    transition: all 0.2s ease;
+    padding: 2px;
+    border-radius: 3px;
+}
+
+.refresh-icon:hover {
+    opacity: 1;
+    color: #007bff;
+    background-color: rgba(0, 123, 255, 0.1);
+    transform: scale(1.1);
+}
+
+.refresh-icon.spinning {
+    animation: spin 1s linear infinite;
+    color: #007bff;
+    opacity: 1;
+    background-color: rgba(0, 123, 255, 0.1);
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}