items: read the details of the focused item

The item grids said which item you were on ("a torch, slot 3") but nothing
about what it was -- no description, no condition, and no "what does this
refine into", which is the whole of alchemy.

The game already composes all of it in one place: item.getPopupMessage()
(modules/item.lua:199) returns the cursor popup's line list, so read that
rather than re-deriving anything from templates.

It also already gates it behind a dwell -- the popup only fades in after
examinationPopupFadeInDuration (0.4s), so a sighted player who arrows past a
slot never sees the details either. Mirror that instead of inventing a
modality: stop on an item for 0.6s and the details speak themselves, queued.
"=" reads them on demand, Shift+= keeps the name line too. ("r" was the
obvious mnemonic but is a game-claimed scancode, and getCommand() dispatches
on scancode ignoring modifiers.)

New generic hook descriptor.details() returning a LIST of blocks, so each is
also pushed into the console history and [ ] \ walk a long description back
afterwards -- the journal page trick. Only _itemgrid.lua implements it so far.

The other half is the hint panel craft/refine/trade draw permanently beside
the grid, which the popup never contains: recipe components, and price, which
appears nowhere else in the game. The three panels share a shape, so one
reader covers them. Affordability survives only as a red colour in the hint
table and decides whether enter does anything, so it is decoded and spoken.

59 testbed checks, 0 failures: a synthetic ivy_leaves item as the version-bump
canary for getPopupMessage, hasUpvalue over every hint-panel local, four
assertions on the pure settleStep, and an end-to-end "=" press. Not yet
exercised against a live item -- the prologue inventory is empty.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

accessibility/hotkeys.lua

@@ -90,6 +90,9 @@ bind("]", "shift", history.reviewLast)
 bind("\\", nil, history.repeatCurrent)
 bind("\\", "shift", history.copyCurrent)
 
+-- Other keys are registered by their own modules via hotkeys.bind, from
+-- init.lua: surroundings, tracker, status, viewwatch, details.
+
 function hotkeys.bind(scancode, mods, action)
 	bind(scancode, mods, action)
 end