Performance pass: cut per-frame allocations and draw calls, fix frame-rate and batch bugs

- Shared render: cache Font encode/width, skip unchanged palette/ShaderFX
  uniform sends, reuse quads and scratch tables, cheaper sprite palettes
- Mods: fast path for loaded requires, memoized sandbox verdicts, fewer
  Hooks:call allocations, drop emptied hook chains
- Audio: bulk PCM writes, cry/SFX prewarm on the worker, sliced sync
  fallback, cached Gen 3 SE sources
- Gen 1: per-frame SGB battle palettes, hoisted overworld FX, cached menus
- Gen 2: numeric attr grid, indexed anim cells, entity culling, memoized
  cache keys, palette shader set once per tile run
- Gen 3: reuse native tile batches, per-cell metatile rebuilds, partial
  FRLG tile anim uploads, near-view ghost ticking, packed FRLG font atlas
- Fixes: emergency quit timer, Gen 3 batch regression and stale sprite
  index, trainer card texture leak, missing pic re-reads, anim tint cache,
  Crystal ghost grass overdraw, refresh-rate dependent counters, pad swap

src/ui/Menu.lua

@@ -130,16 +130,24 @@ function Menu:draw()
   -- PlaceString at hlcoord 3,0 writes over the border row it was just
   -- drawn on (oak_speech2.asm:162-170)
   if self.title then
-    local title = self.title:gsub("{DONE}%s*$", "")
-      :gsub("{PROMPT}%s*$", "")
-    local lines = {}
-    for line in (title .. "\n"):gmatch("(.-)\n") do
-      lines[#lines + 1] = line
+    -- the title's lines and glyph counts, rebuilt only when it changes
+    -- (this draws every frame the menu is up)
+    local lines, glyphs = self.titleLines, self.titleGlyphs
+    if self.titleLinesFor ~= self.title or not lines then
+      local title = self.title:gsub("{DONE}%s*$", "")
+        :gsub("{PROMPT}%s*$", "")
+      lines, glyphs = {}, {}
+      for line in (title .. "\n"):gmatch("(.-)\n") do
+        lines[#lines + 1] = line
+        glyphs[#lines] = #Font.split(line)
+      end
+      self.titleLinesFor = self.title
+      self.titleLines, self.titleGlyphs = lines, glyphs
     end
     love.graphics.setColor(1, 1, 1, 1)
-    for i, line in ipairs(lines) do
+    for i = 1, #lines do
       love.graphics.rectangle("fill", (self.tx + 3) * 8,
-        (self.ty + i - 1) * 8, #Font.split(line) * 8, 8)
+        (self.ty + i - 1) * 8, glyphs[i] * 8, 8)
     end
     love.graphics.setColor(0, 0, 0, 1)
     for i, line in ipairs(lines) do