docs: phone report 2026-09-07 later -- overscroll, low initial fling velocity, input/timing report; queued

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/RUST.md

@@ -240,6 +240,11 @@ closes it.
   rest of her phone shows (UI_RULES "show what the reader already sees
   elsewhere"), at the cost of the app no longer looking identical on
   every device. Not done without her verdict.
+- [ ] Scroll clamped at both ends, and Compose's impulse velocity
+  estimator with min/max fling velocity (docs/IRIS_TODO.md, 2026-09-07
+  later). After the culling fix lands (same file).
+- [ ] Input-event and timing instrumentation into the log ring, copied
+  by the report button. After the logging route lands (same ring).
 - [ ] Masks with a shape -- docs/LAYOUT.md "Masks with a shape (decided
   2026-09-07)". A mask references a primitive already drawn
   (rect SDF, texture or glyph alpha), chained and multiplied; `.masked()`