fix: QA report BUG-01 to BUG-12 full resolution - demo switcher, AI tutor stream, timeline alignment, cbt filtering, danger styling, streak celebration

public/streak-animation.html

@@ -376,8 +376,9 @@
   function play(){
     clearTimeout(countTimer); clearTimeout(moodTimer); cancelAnimationFrame(countRAF); stopFw();
     const target=parseTarget();
-    const sad = target<=2;
-    const t = sad ? 0 : Math.min(1, Math.log10(Math.max(target,3)/3)/3);  // 5→0 … 5000+→1
+    // BUG-11 fix: Positive streaks (>=1) should always be celebratory, never sad
+    const sad = target < 0;
+    const t = sad ? 0 : Math.min(1, Math.log10(Math.max(target, 1) + 1) / 2.5);  // Smooth positive scaling
 
     // set mood + intensity
     stage.classList.remove('play','happy','sad','tier1','tier2','tier3'); body.classList.remove('sad');