fix: improve map header background and remove unnecessary KPI

- Replace ocean/water header image with forest/trees background
- Remove 'Selected' KPI counter, keep only 'Trees' counter
- Use forest path image (photo-1441974231531-c6227db76b6e)
- Cleaner mobile view with single relevant metric
- Better visual consistency with TreeTrack's nature theme

static/map.html

@@ -853,11 +853,6 @@
                         <span class="stat-text">Trees:</span>
                         <span class="stat-number" id="treeCount">0</span>
                     </div>
-                    <div class="stat-item">
-                        <span class="stat-icon">S</span>
-                        <span class="stat-text">Selected:</span>
-                        <span class="stat-number" id="selectedCount">0</span>
-                    </div>
                 </div>
                 
                 <div class="tt-header-actions">
@@ -957,7 +952,7 @@
                 direction: 'diagonal',
                 isPausedWhenNotInView: false,
                 image: {
-                    source: 'https://images.unsplash.com/photo-1518837695005-2083093ee35b?q=80&w=2560&auto=format&fit=crop&ixlib=rb-4.0.3',
+                    source: 'https://images.unsplash.com/photo-1441974231531-c6227db76b6e?q=80&w=2560&auto=format&fit=crop&ixlib=rb-4.0.3',
                     position: ['center', 'center'],
                     stretchMode: ['stretch', 'stretch'],
                     blendingMode: 'multiply'