docs: the signal badges, the signal pages and the six-badge overflow (step 2 of the redesign)

Also wrap the signals page's hint line, which at 375 px minimum widened the whole slide-over panel to 376.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/claude/probe-readings.md

@@ -987,7 +987,8 @@ two also catch a row whose accelerator went missing. `settings=` must be a real
     in the `[helpui]` entry above, where `raw`, `target` and `inside` are explained). `clear=0` is read as geometry, not
     as a placement bug, on the plot stop (the target is the whole content) and on the trigger stop at the
     documented 756 px window (the panel is 360 px of it, so the card has no side wide enough and goes flush
-    left over the plot, overlapping the panel's edge by a few pixels).
+    left over the plot, overlapping the panel's edge by a few pixels), and on the `signals` stop for the same
+    reason (the dock beside it is 320 px and the card has no side wide enough).
   - `[toursurface] finished: running=0 slideover=none` -- the last Next ended the walk and **the panel is
     closed with it**.
   - `[toursurface] restarted at trigger: running=1 slideover=trigger` then
@@ -2664,7 +2665,7 @@ signals list while the title and the badge marker still name `trigger`; `-1` whe
 (`kMaxSignalBadges`); beyond that `badges=0 overflow=1 overflow_text=<N> signals plus_visible=0` (the "N signals" badge replaces the badges and the "+"). `dot_plotted` is the number of
 badges whose signal is on a plot (its dot is then the trace colour, not the unplotted grey). `bar_h` is the bar's allocated height and `bar_h_fixed=1` that neither it nor its natural
 height moved while one signal was switched off and on again (`rebuild_signal_panels()` each time), and that the badge count followed; `0` is a bar whose height depends on its content.
-`bar_min_w` is only a record: the scroller must keep it the same however many signals there are (it reads 336 with the mock's 4 and with the overflow forced on). `opens=1`: clicking the
+`bar_min_w` is only a record: the scroller must keep it the same however many signals there are (it reads 336 with the UDPS mock's 4 and with the overflow forced on, and 329 against the E-1608 mock with one signal and with nine -- the overflow, `enabled=9 badges=0 overflow=1 overflow_text=9 signals plus_visible=0 bar_h=36 bar_h_fixed=1`; a value that grows with the signal count is a scroller that has stopped constraining the bar). `opens=1`: clicking the
 first signal badge opens `signal:<name>` with the badge marked open and a second click closes it (`-1` when overflowed, there being no signal badges); `plus_opens=1` the same for the "+"
 (the overflow badge when overflowed) and the `signals` page.