fix: Replay controls

docs/clinical-testing-guide.md

@@ -110,7 +110,7 @@ Use the sidebar (desktop) or bottom navigation (mobile) to move between screens.
 | **Sepsis bundle** | If sepsis was suspected — four time-critical elements and compliance status |
 | **Vital sign charts** | Trends for HR, RR, systolic BP, SpO₂, temperature |
 | **NEWS2 history** | How the early warning score changed over time |
-| **Replay controls** | Local timeline bar (pause, speed, **Next Alert →**) to step through the case |
+| **Replay controls** | Local timeline bar (pause, speed, **Next Alert →**) — scrubs charts/vitals to a point in time; does not control the simulator |
 
 **What to notice:** Would you trust these charts and explanations during a real handoff? Is anything missing?
 
@@ -271,7 +271,7 @@ Use this during or after your session.
 - [ ] Vital sign charts show sensible trends
 - [ ] NEWS2 history chart updates over time
 - [ ] Sepsis bundle panel appears when sepsis alerts fire
-- [ ] **Next Alert →** scrolls to review section and selects alerts
+- [ ] **Next Alert →** selects each open alert, scrubs charts to that time, and scrolls the review section into view
 
 ### Alert Center
 - [ ] Open / Acknowledged / Resolved tabs filter correctly
@@ -330,7 +330,7 @@ No. Rate any alert in any status.
 *Useful* = good alert clinically. *Would act* = you would specifically change care because of it. An alert can be useful information but not change your plan — use the button that best matches your reasoning.
 
 **The replay bar doesn’t pause the simulator.**  
-Correct — replay controls only scrub data already loaded in the browser. The facilitator controls simulator speed separately.
+Correct — replay controls scrub observation/chart data already loaded in the browser (pause, speed, and **Next Alert →** move a local timeline). The facilitator controls simulator speed separately.
 
 **Dark mode?**  
 Toggle in the header if your eyes prefer it; all screens support dark mode.