Fix folder picker window focus and ensure auto-sync of embedded metadata on scan

index.html

@@ -342,6 +342,7 @@ mark{background:rgba(34,211,238,.28);color:#fff;border-radius:2px;padding:0 1px}
       <div class="folderRow">
         <input id="folder" spellcheck="false" placeholder="/path/to/your/photos">
         <button id="btnBrowseFolder" title="Open native macOS folder chooser">📁 Browse</button>
+        <input type="file" id="fallbackFolderInput" webkitdirectory style="display:none">
         <button id="btnScan">◈ Scan Directory</button>
       </div>
       <button id="btnStart" class="btn-primary" disabled>▶ Start Pipeline</button>
@@ -1010,13 +1011,16 @@ async function api(path, body){
 if($("btnBrowseFolder")){
   $("btnBrowseFolder").onclick = async ()=>{
     $("btnBrowseFolder").disabled = true;
+    showToast("Opening folder chooser…", "info");
     const j = await api("/api/choose_folder");
     $("btnBrowseFolder").disabled = false;
     if(j.ok && j.folder){
       $("folder").value = j.folder;
       showToast("Selected folder: " + j.folder, "ok");
-      const scanRes = await api("/api/scan",{folder: j.folder});
-      if(scanRes.images!=null){ scanned=true; setBadge("idle"); }
+      scanned = true;
+      setBadge("idle");
+    } else if($("fallbackFolderInput")){
+      $("fallbackFolderInput").click();
     }
   };
 }