Organize Iris support files

app/touch/flick-120hz.touch

@@ -1,6 +1,5 @@
 # A finger flick the shape Iris's phone delivers one, from
-# docs/bench/iris-phone-v2-2026-09-06.md and docs/IRIS_TODO.md's
-# "From the phone, 2026-09-06, 22:16": at 120Hz a flick reaches the app
+# docs/bench/iris-phone-v2-2026-09-06.md: at 120Hz a flick reaches the app
 # as DOWN, one or two MOVEs and UP inside a few frames, with the
 # intermediate positions batched inside those MOVEs as historical
 # samples (~4ms apart, the touch digitiser's own rate) rather than