fix: restore proper spinning animation for mobile refresh FAB

Reverted HTML replacement approach and restored the cleaner CSS-based
animation from commit 1855085.

Previous (wrong) approach:
- Replaced button HTML with spinner
- Modified both desktop and mobile buttons in apiClient.js
- Messy and inconsistent

Restored (correct) approach:
- Add/remove .spinning CSS class in click handler
- CSS animates only the icon inside the button
- Button itself stays unchanged
- Much cleaner implementation

Changes:
- Reverted apiClient.js changes from commit 9a49433
- Added .spinning CSS class and @keyframes rpg-spin
- Updated index.js click handler to bind both buttons
- Uses addClass/removeClass for clean animation control
- Includes drag detection to prevent accidental clicks

Now the mobile FAB icon spins smoothly when refreshing!

index.js

@@ -328,12 +328,34 @@ async function initUI() {
         toggleAnimations();
     });
 
-    $('#rpg-manual-update').on('click', async function() {
+    // Bind to both desktop and mobile refresh buttons
+    $('#rpg-manual-update, #rpg-manual-update-mobile').on('click', async function() {
+        // Get mobile button reference
+        const $mobileBtn = $('#rpg-manual-update-mobile');
+
+        // Skip if we just finished dragging the mobile button
+        if ($mobileBtn.data('just-dragged')) {
+            console.log('[RPG Companion] Click blocked - just finished dragging refresh button');
+            return;
+        }
+
         if (!extensionSettings.enabled) {
             // console.log('[RPG Companion] Extension is disabled. Please enable it in the Extensions tab.');
             return;
         }
-        await updateRPGData(renderUserStats, renderInfoBox, renderThoughts, renderInventory);
+
+        // Remove focus to prevent sticky black state on mobile
+        $(this).blur();
+
+        // Add spinning animation to mobile button
+        $mobileBtn.addClass('spinning');
+
+        try {
+            await updateRPGData(renderUserStats, renderInfoBox, renderThoughts, renderInventory);
+        } finally {
+            // Remove spinning animation when done
+            $mobileBtn.removeClass('spinning');
+        }
     });
 
     // Reset FAB positions button