Exclude generic iframe "embed" AOIs from Ranked Attention

TRACKING_JS tags every <iframe> identically as "embed" regardless of
size or content — it can't see what's inside one. A single
page-spanning iframe (PDF viewer, embedded system, video player) then
swallowed every gaze sample under one undifferentiated "Embedded
content" bucket, reporting 100% attention on something that isn't a
real, distinguishable target. _find_aoi() now skips "embed" candidates
so those points go unlabeled instead, the same as any other untracked
area — raw gaze data and the per-segment heatmap are unaffected, only
the Ranked Attention/Most Attended rollup changes. Also drops the now-
unreachable "embed" branches in friendly_label()/iconForLabel().

analysis.py

@@ -121,8 +121,6 @@ def friendly_label(raw):
         return "Page footer"
     if raw == "video":
         return "Video"
-    if raw == "embed":
-        return "Embedded content (PDF, player, or widget)"
     if raw.startswith("img: "):
         return "Image — " + raw[5:]
     m = re.match(r"^(h[123]):\s*(.*)$", raw)
@@ -144,10 +142,25 @@ def friendly_label(raw):
 # =============================================================================
 
 def _find_aoi(px, py, aois):
-    """Smallest padded AOI containing (px, py), or None. Mirrors the JS hit-test."""
+    """Smallest padded AOI containing (px, py), or None. Mirrors the JS hit-test.
+
+    Skips raw label "embed": TRACKING_JS's insightuxAOIs() tags every
+    <iframe> identically regardless of what's actually inside it or how
+    much of the page it covers — it has no visibility into the iframe's
+    own content. A single page-spanning iframe (a PDF viewer, an embedded
+    system, a video player) then swallows every gaze sample that lands on
+    it under one generic "Embedded content" bucket, drowning out anything
+    more specific and making Ranked Attention/Most Attended report
+    something that isn't a real, distinguishable attention target. Points
+    over an iframe just go unlabeled instead (matching what already
+    happens over any other untracked area) — the raw gaze samples
+    themselves, and the per-segment heatmap that draws them, are
+    unaffected either way."""
     best = None
     best_area = None
     for a in aois:
+        if a["label"] == "embed":
+            continue
         x, y, w, h = a["x"], a["y"], a["w"], a["h"]
         if (x - PAD_PX) <= px <= (x + w + PAD_PX) and (y - PAD_PX) <= py <= (y + h + PAD_PX):
             area = w * h
@@ -821,7 +834,7 @@ const Viewer = (function(){
 function iconForLabel(label){
   if (!label) return 'click';
   if (label.indexOf('Image') === 0) return 'image';
-  if (label.indexOf('Video') === 0 || label.indexOf('Embedded') === 0) return 'video';
+  if (label.indexOf('Video') === 0) return 'video';
   if (label.indexOf('heading') !== -1 || label.indexOf('Heading') === 0 || label.indexOf('Text') === 0) return 'type';
   if (label.indexOf('Navigation') === 0) return 'menu';
   if (label.indexOf('Page header') === 0 || label.indexOf('Page footer') === 0) return 'layers';