Add user self-registration and implement rate limiting for predictions

Allow users to add themselves to the player database through a web form,
eliminating the need for manual pdga-numbers.txt updates. Implement 24-hour
rate limiting on prediction refreshes to prevent abuse while maintaining
reasonable update frequency.

Key changes:
- Add player self-registration with PDGA number lookup and confirmation
- Store predicted ratings in database for persistence across restarts
- Implement 24-hour rate limit on prediction refresh endpoint
- Make database the single source of truth (text file only for initial seed)
- Remove "Scrape All Layouts" bulk operation button
- Update "Load All" to refresh existing players instead of text file

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

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

courses.html

@@ -87,6 +87,29 @@
             background-color: #6c757d;
             cursor: not-allowed;
         }
+        .search-container {
+            margin-bottom: 20px;
+            text-align: center;
+        }
+        .search-input {
+            width: 100%;
+            max-width: 400px;
+            padding: 10px 15px;
+            font-size: 16px;
+            border: 2px solid #ddd;
+            border-radius: 4px;
+            outline: none;
+            transition: border-color 0.2s;
+        }
+        .search-input:focus {
+            border-color: #007bff;
+        }
+        .search-results-info {
+            text-align: center;
+            margin: 10px 0;
+            color: #666;
+            font-size: 14px;
+        }
         table {
             width: 100%;
             border-collapse: collapse;
@@ -251,13 +274,21 @@
             <a href="/courses.html" style="color: #333;">Courses</a>
         </div>
 
+        <div class="search-container">
+            <input
+                type="text"
+                class="search-input"
+                id="course-search"
+                placeholder="Search courses by name or city..."
+                oninput="searchCourses()"
+            />
+        </div>
+        <div id="search-results-info" class="search-results-info"></div>
+
         <div class="controls">
             <button class="btn" onclick="scrapeCourses()" id="scrape-courses-btn">
                 <i class="fas fa-sync-alt"></i> Scrape Courses
             </button>
-            <button class="btn" onclick="scrapeAllLayouts()" id="scrape-all-layouts-btn">
-                <i class="fas fa-layer-group"></i> Scrape All Layouts
-            </button>
         </div>
 
         <div id="loading" class="loading" style="display: none;">Loading courses...</div>
@@ -265,6 +296,8 @@
     </div>
 
     <script>
+        let allCourses = [];
+
         async function loadCourses() {
             const loading = document.getElementById('loading');
             const tableDiv = document.getElementById('courses-table');
@@ -274,10 +307,11 @@
 
             try {
                 const response = await fetch('/api/courses');
-                const courses = await response.json();
+                allCourses = await response.json();
 
                 loading.style.display = 'none';
-                displayCourses(courses);
+                displayCourses(allCourses);
+                updateSearchInfo(allCourses.length, allCourses.length);
             } catch (error) {
                 console.error('Error loading courses:', error);
                 loading.style.display = 'none';
@@ -285,6 +319,34 @@
             }
         }
 
+        function searchCourses() {
+            const searchInput = document.getElementById('course-search');
+            const searchTerm = searchInput.value.toLowerCase().trim();
+
+            if (!searchTerm) {
+                displayCourses(allCourses);
+                updateSearchInfo(allCourses.length, allCourses.length);
+                return;
+            }
+
+            const filtered = allCourses.filter(course => {
+                return course.name.toLowerCase().includes(searchTerm) ||
+                       course.city.toLowerCase().includes(searchTerm);
+            });
+
+            displayCourses(filtered);
+            updateSearchInfo(filtered.length, allCourses.length);
+        }
+
+        function updateSearchInfo(showing, total) {
+            const infoDiv = document.getElementById('search-results-info');
+            if (showing === total) {
+                infoDiv.textContent = `Showing all ${total} courses`;
+            } else {
+                infoDiv.textContent = `Showing ${showing} of ${total} courses`;
+            }
+        }
+
         function displayCourses(courses) {
             const tableDiv = document.getElementById('courses-table');
 
@@ -490,7 +552,8 @@
 
                 if (data.success) {
                     alert(data.message);
-                    loadCourses(); // Reload the courses list
+                    await loadCourses(); // Reload the courses list
+                    searchCourses(); // Reapply search filter if any
                 } else {
                     alert('Failed to scrape courses');
                 }
@@ -542,41 +605,6 @@
             }
         }
 
-        async function scrapeAllLayouts() {
-            const btn = document.getElementById('scrape-all-layouts-btn');
-
-            if (!confirm('This will scrape layouts for all courses. This may take several minutes. Continue?')) {
-                return;
-            }
-
-            btn.disabled = true;
-            btn.innerHTML = '<i class="fas fa-sync-alt spinning"></i> Scraping...';
-
-            try {
-                const response = await fetch('/api/scrape-all-layouts', {
-                    method: 'POST'
-                });
-
-                const data = await response.json();
-
-                if (data.success) {
-                    alert(data.message);
-                    // Clear all loaded states to force reload
-                    document.querySelectorAll('.layouts-container').forEach(container => {
-                        container.dataset.loaded = 'false';
-                    });
-                } else {
-                    alert('Failed to scrape layouts');
-                }
-            } catch (error) {
-                console.error('Error scraping all layouts:', error);
-                alert('Error scraping all layouts');
-            } finally {
-                btn.disabled = false;
-                btn.innerHTML = '<i class="fas fa-layer-group"></i> Scrape All Layouts';
-            }
-        }
-
         // Load courses on page load
         loadCourses();
     </script>