fix: align AR/IGNav video timing and filter broken AEQA model

- AR/IGNav: offset world model videos by 1 frame (Frame N shows Frame N-1 videos)
- AEQA: exclude FTwan22_A14B from model selector (data format incompatible)

Author: annaaaddddd

subpages/js/app.js

@@ -8,6 +8,10 @@ async function startDemo() {
   const resp = await fetch(manifestUrl);
   const manifest = await resp.json();
   const models = Object.keys(manifest.models);
+  // Filter out FTwan22_A14B for AEQA (data format issue)
+  if (currentScenario.taskType === "AEQA") {
+    models = models.filter(m => m !== "FTwan22_A14B");
+  }
   const modelNameMap = {
     "FTcosmos": "Cosmos-P2†",
     "FTwan21": "Wan2.1†",

subpages/js/rendering.js

@@ -394,9 +394,13 @@ function displayFrame(i, skipVideoInit = false) {
       })();
     }
     else if (currentScenario.taskType !== "AEQA" && currentScenario.taskType !== "Manip") {
+      // AR and IGNav: use previous frame's videos (offset by 1)
       (async () => {
         try {
-          const urls = await findUpToTwoVideos(f.frameKey);
+          // For frame N, show videos from frame N-1
+          const videoFrameKey = currentFrameIndex > 0 ? frames[currentFrameIndex - 1].frameKey : f.frameKey;
+          
+          const urls = await findUpToTwoVideos(videoFrameKey);
           setVideoSrcOrPlaceholder(document.getElementById(`pred1_${f.frameKey}`), urls[0] || null);
           setVideoSrcOrPlaceholder(document.getElementById(`pred2_${f.frameKey}`), urls[1] || null);
         } catch (e) {