chore: remove dead code orphaned by topbar redesign (#4)

The new topbar's "Refresh all" button replaces the old SSE-driven
"Load All" link and progress UI. With those gone, several pieces of
infrastructure had no callers left:

- GET /api/load-all-players, POST /api/populate-database, and
  GET /api/database-status — SSE endpoints with no frontend consumers
- #progress-section / #loading divs in players + courses pages
- .progress-container / .progress-bar / .progress-text / .loading CSS
- public/js/progress.js script (defines fetchRatingsWithProgress, never
  called, and loadAllPlayers, no longer wired) — to be deleted manually
  since the sandbox blocks rm

views/pages/courses.ejs

@@ -19,7 +19,6 @@
             </div>
         </div>
 
-        <div id="loading" class="loading" style="display: none;">Loading courses...</div>
         <div id="courses-table" hx-get="/partials/course-table" hx-trigger="load"></div>
 `; %>
 

views/pages/index.ejs

@@ -19,13 +19,6 @@
         <div style="display: flex; justify-content: flex-end; gap: 12px; margin-bottom: 16px;">
             <a href="#" onclick="clearCache(); return false;" style="color: var(--text-muted); font-size: 12px; text-decoration: none; opacity: 0.4;" title="Clear cache"><i class="fas fa-cog"></i></a>
         </div>
-        <div id="loading" class="loading" style="display: none;">Loading ratings...</div>
-        <div id="progress-section" style="display: none;">
-            <div class="progress-container">
-                <div id="progress-bar" class="progress-bar">0%</div>
-            </div>
-            <div id="progress-text" class="progress-text">Preparing to load ratings...</div>
-        </div>
         <div id="ratings-table" hx-get="/partials/ratings-table" hx-trigger="load"></div>
 `; %>
 
@@ -57,7 +50,7 @@
     title: 'PDGA Ratings',
     activePage: 'players',
     cssFiles: ['players.css'],
-    jsFiles: ['tooltips.js', 'chart.js', 'progress.js', 'players.js'],
+    jsFiles: ['tooltips.js', 'chart.js', 'players.js'],
     initScript: 'setupTooltipsAfterSwap();',
     body: body,
     modals: modals