Phase 1: console history, review keys, and wall tones

Game-file footprint unchanged: still one line in main.lua.

Console (Q4: speak everything queued, cancelled by explicit action):
- history.lua keeps our own unbounded history, since the game's console buffer
  expires entries after 3s. Mirrors the game's (xN) coalescing so what is heard
  matches what is on screen. The review cursor holds position while new lines
  arrive rather than being yanked to the tail mid-read.
- patches/console.lua wraps console.print, calling the real one first so a bug
  on our side cannot swallow a message the player would otherwise see.
- Any keypress reaching the game silences the pending speech backlog.

Hotkeys: [ and ] review, Shift+[/] jump to ends, \ repeat, Shift+\ copy.
Chosen from scancodes the game does not bind. Note keybindings.getCommand()
ignores modifiers, so Ctrl+Up would read to the game as a movement -- our keys
are consumed and never overlay a game-claimed scancode.

Wall tones (Q5: on step, 3D-positioned, radius 5):
- Direction and distance are deliberately decoupled. The listener sits at the
  camera 4 units above the plane under an inverse distance model, so placing a
  tone at the wall's real position would make distant walls quieter (the
  opposite of the request) and collapse the stereo pan. Instead the source sits
  at a fixed radius in the wall's direction at listener height, and volume is
  computed explicitly from distance.
- Step detection polls player coordinates rather than hooking movement, so it
  covers walking, pathing, portals and pushes for free.
- Respects FoV/rememberedFoV; never leaks unseen geometry.

tests/test_history.lua: 16 assertions, all passing, pure Lua.

Not yet verified in actual play -- needs a human at the keyboard.

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

accessibility/init.lua

@@ -15,6 +15,8 @@ local accessibility = {}
 
 local speech = require("accessibility.speech")
 local stateNames = require("accessibility.stateNames")
+local hotkeys = require("accessibility.hotkeys")
+local walltones = require("accessibility.walltones")
 
 local initialized = false
 
@@ -86,9 +88,28 @@ local function hookStates()
 	local realUpdate = states.update
 	states.update = function(dt)
 		local result = realUpdate(dt)
+		pcall(walltones.update)
 		pcall(speech.flush)
 		return result
 	end
+
+	-- Global hotkey layer. Ours are consumed; everything else falls through to the
+	-- game untouched.
+	local realKeypressed = states.keypressed
+	states.keypressed = function(key, scancode)
+		local consumed = false
+		local ok, result = pcall(hotkeys.keypressed, key, scancode)
+		if ok then
+			consumed = result
+		end
+
+		if consumed then
+			return
+		end
+
+		pcall(hotkeys.onGameKey)
+		return realKeypressed(key, scancode)
+	end
 end
 
 --------------------------------------------------------------------------------
@@ -101,8 +122,11 @@ function accessibility.initialize()
 	end
 	initialized = true
 
+	accessibility.registerPatch("console", require("accessibility.patches.console"))
+
 	local ok, err = pcall(function()
 		speech.initialize()
+		walltones.load()
 		hookStates()
 		applyPatches()
 	end)