Enable throttled fallback tracking for Tab 2 consistency

LaserPerception/LaserPerception.js

@@ -2701,7 +2701,21 @@
         if (isHfMode(mode)) {
             if (!state.detector.hfTrackingWarned) {
                 state.detector.hfTrackingWarned = true;
-                log("HF mode uses backend processing; local COCO tracking is disabled to avoid GPU leaks. Use External tracker or RAW feed.", "w");
+                log("HF mode active: Using local COCO model for live tracking (fallback).", "t");
+            }
+            // Fallback to COCO for live tracking so Radar/Cards aren't empty
+            await ensureCocoDetector();
+            if (state.detector.model) {
+                try {
+                    let preds = await state.detector.model.detect(videoEngage);
+                    return preds
+                        .filter(p => p.score >= 0.45)
+                        .slice(0, 18)
+                        .map(p => ({ bbox: p.bbox, class: p.class, score: p.score }));
+                } catch (err) {
+                    // ignore security error for fallback
+                    return [];
+                }
             }
             return [];
         }
@@ -2973,7 +2987,11 @@
             state.tracker.lastFrameTime = tNow;
 
             // detection schedule
-            const hz = +detHz.value;
+            let hz = +detHz.value;
+            // Throttle to ~5Hz (approx every 12 frames) for HF fallback mode to save resources
+            if (isHfMode(state.detector.mode)) {
+                hz = Math.min(hz, 5);
+            }
             const period = 1000 / Math.max(1, hz);
             if ((tNow - state.tracker.lastDetTime) >= period) {
                 state.tracker.lastDetTime = tNow;