Fix umap fullscreen exit when click-to-navigate is active (#176)

* Initial plan

* Fix: Exit fullscreen when clicking image with 'Click selects image' enabled

Co-authored-by: lstein <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: lstein <[email protected]>

Author: Copilot

photomap/frontend/static/javascript/umap.js

@@ -1296,6 +1296,11 @@ async function handleImageClick(clickedIndex) {
 
   // Navigate directly to the clicked image without entering search mode
   slideState.navigateToIndex(clickedIndex, false);
+  
+  // Exit fullscreen mode if enabled
+  if (isFullscreen && state.umapExitFullscreenOnSelection) {
+    setTimeout(() => toggleFullscreen(false), 100); // slight delay to avoid flicker
+  }
 }
 
 // -------------------- Window Management --------------------