Fix result modal cache mismatch

frontend/app.js

@@ -49,6 +49,20 @@ const resultModalMediaFrame = document.getElementById("resultModalMediaFrame");
 const resultModalVideo = document.getElementById("resultModalVideo");
 const resultModalThumbnail = document.getElementById("resultModalThumbnail");
 const resultModalEmbedNotice = document.getElementById("resultModalEmbedNotice");
+const resultModalReady = Boolean(
+  resultModal &&
+  resultModalTitle &&
+  resultModalSource &&
+  resultModalSnippet &&
+  resultModalReason &&
+  resultModalOpenExternal &&
+  resultModalDownload &&
+  closeResultModal &&
+  resultModalMediaFrame &&
+  resultModalVideo &&
+  resultModalThumbnail &&
+  resultModalEmbedNotice,
+);
 
 let pendingDownload = null;
 let cropStart = 0;
@@ -349,6 +363,9 @@ function hideModal(element) {
 }
 
 function resetResultModalMedia() {
+  if (!resultModalReady) {
+    return;
+  }
   resultModalVideo.pause();
   detachVideoSource(resultModalVideo);
   resultModalMediaFrame.style.aspectRatio = "";
@@ -420,6 +437,10 @@ async function prepareDirectDownload(targetUrl) {
 }
 
 function openResultModal(item) {
+  if (!resultModalReady) {
+    logEvent("result:modal:error", { message: "result modal is not fully initialized" });
+    return;
+  }
   activeResultItem = item;
   resultModalTitle.textContent = item.title || "Untitled";
   resultModalSource.textContent = item.source || "";
@@ -444,6 +465,9 @@ function openResultModal(item) {
 }
 
 function closeResultViewer() {
+  if (!resultModalReady) {
+    return;
+  }
   if (!resultModal.classList.contains("hidden")) {
     logEvent("result:modal:close", { title: activeResultItem?.title || "" });
   }
@@ -586,24 +610,27 @@ confirmDownload.addEventListener("click", async () => {
 });
 
 closePreviewModal.addEventListener("click", closeModal);
-closeResultModal.addEventListener("click", closeResultViewer);
-resultModal.addEventListener("click", (event) => {
-  if (event.target === resultModal) {
-    closeResultViewer();
-  }
-});
-resultModalDownload.addEventListener("click", async () => {
-  if (!activeResultItem?.link) {
-    return;
-  }
-  try {
-    closeResultViewer();
-    await prepareDirectDownload(activeResultItem.link);
-  } catch (error) {
-    downloadResult.textContent = error.message;
-    logEvent("download:preview:error", { message: error.message, data: error.data || null, source: activeResultItem?.source || "" });
-  }
-});
+if (resultModalReady) {
+  closeResultModal.addEventListener("click", closeResultViewer);
+  resultModal.addEventListener("click", (event) => {
+    if (event.target === resultModal) {
+      closeResultViewer();
+    }
+  });
+  resultModalDownload.addEventListener("click", async () => {
+    if (!activeResultItem?.link) {
+      return;
+    }
+    const currentItem = activeResultItem;
+    try {
+      closeResultViewer();
+      await prepareDirectDownload(currentItem.link);
+    } catch (error) {
+      downloadResult.textContent = error.message;
+      logEvent("download:preview:error", { message: error.message, data: error.data || null, source: currentItem?.source || "" });
+    }
+  });
+}
 previewModal.addEventListener("click", (event) => {
   if (event.target === previewModal) {
     closeModal();
@@ -663,16 +690,18 @@ previewThumbnail.addEventListener("load", () => {
     previewMediaFrame.style.aspectRatio = `${previewThumbnail.naturalWidth} / ${previewThumbnail.naturalHeight}`;
   }
 });
-resultModalVideo.addEventListener("loadedmetadata", () => {
-  if (resultModalVideo.videoWidth > 0 && resultModalVideo.videoHeight > 0) {
-    resultModalMediaFrame.style.aspectRatio = `${resultModalVideo.videoWidth} / ${resultModalVideo.videoHeight}`;
-  }
-});
-resultModalThumbnail.addEventListener("load", () => {
-  if (!resultModalVideo.src && resultModalThumbnail.naturalWidth > 0 && resultModalThumbnail.naturalHeight > 0) {
-    resultModalMediaFrame.style.aspectRatio = `${resultModalThumbnail.naturalWidth} / ${resultModalThumbnail.naturalHeight}`;
-  }
-});
+if (resultModalReady) {
+  resultModalVideo.addEventListener("loadedmetadata", () => {
+    if (resultModalVideo.videoWidth > 0 && resultModalVideo.videoHeight > 0) {
+      resultModalMediaFrame.style.aspectRatio = `${resultModalVideo.videoWidth} / ${resultModalVideo.videoHeight}`;
+    }
+  });
+  resultModalThumbnail.addEventListener("load", () => {
+    if (!resultModalVideo.src && resultModalThumbnail.naturalWidth > 0 && resultModalThumbnail.naturalHeight > 0) {
+      resultModalMediaFrame.style.aspectRatio = `${resultModalThumbnail.naturalWidth} / ${resultModalThumbnail.naturalHeight}`;
+    }
+  });
+}
 for (const button of platformToggles) {
   button.addEventListener("click", () => {
     const platform = button.dataset.platformToggle;