slosh: put-away panes are miniature pane frames

Brackets were tried and still read as text. Each min-bar entry is now a
three-row chip wearing a real pane frame -- the same corners, because a
frame is what a pane *looks like* in this program, so a shrunken one reads
as exactly what it is: a pane, clickable. The put-away mark rides inside
each chip and the lone legend is gone; a rung pane's bell mark keeps its
own colour inside the frame; hover lights the whole chip and the whole
chip is the hit. The bar costs three rows instead of one while anything
is minimised (and nothing when nothing is), which is what an affordance
that works is worth.

1 files changed, 10 insertions, 3 deletions

diff --git a/docs/panes.md b/docs/panes.md
index 03f2279..52ace45 100644
--- a/docs/panes.md
+++ b/docs/panes.md
@@ -28,9 +28,16 @@ looking at is drawn.
   stack is the pane on the right once you turn it. Four turns come back exactly.
   A turn that would squeeze a pane under the floor is refused with a word.
 - **`C-a z`** fills the tab with one pane and back; **`C-a m`** puts one away
-  into a strip along the bottom, still running. Each put-away pane is a
-  button there — `[▬ name]`, the brackets meaning what they mean everywhere
-  else here — and clicking it brings the pane back.
+  into a strip along the bottom, still running. Each put-away pane sits there
+  as a **miniature pane frame** — a frame is what a pane looks like here, so
+  a shrunken one reads as exactly what it is — and clicking it anywhere
+  brings the pane back:
+
+  ```
+  ╭────────────╮ ╭─────────────────╮
+  │ ▬ server   │ │ ▬ agent [!]     │
+  ╰────────────╯ ╰─────────────────╯
+  ```
 
 ## The mouse