ui: define TurtleWoW's sizeof so Transmog/Shop windows do not raise on nil

crates/benilla-ui/src/script/stdlib.rs

@@ -397,6 +397,24 @@ do
         local trimmed = _gsub(str, "^%s*(.-)%s*$", "%1")
         return trimmed
     end
+
+    -- `sizeof(t)`: TurtleWoW's `Globals.lua:111` table-entry count. Its patched FrameXML uses it
+    -- wherever a list's length is wanted — `Turtle_TransmogUI.lua:677` counts
+    -- `AvailableTransmogItems[InventorySlotId]`, its `TransmogOutfits` pages, `OptionsFrame.lua`
+    -- the arena-team rows, and `Blizzard_BindingUI` the search results. 1.12 has no such name
+    -- (`reference/1.12-globals.tsv` is silent and no stock file calls it); the exception list in
+    -- `tests/reference_surface.rs` carries the same reason. The body is the reference's verbatim:
+    -- a non-table is 0, and `pairs` counts every key, hash and array.
+    function sizeof(t)
+        if type(t) ~= "table" then
+            return 0
+        end
+        local s = 0
+        for k in pairs(t) do
+            s = s + 1
+        end
+        return s
+    end
 end
 
 -- ── NOT here: tostringall / strconcat / strtrim ────────────────────────────────────────────────

crates/benilla-ui/src/script/tests/reference_surface.rs

@@ -43,6 +43,11 @@ fn allowed_beyond_1_12() -> HashSet<&'static str> {
         "strsplit",
         "strjoin",
         "trim",
+        // TurtleWoW's `Globals.lua:111` table-entry count, which its patched FrameXML calls for
+        // every list length (Turtle_TransmogUI's available-items/outfits, the guild bank, arena
+        // rows, binding search). `sizeof` is not 1.12's name and the exception is its `Globals.lua`
+        // ship — same reason the four above.
+        "sizeof",
         // TurtleWoW's addon-message split and delimiters: its `HonorFrame.lua:46` and
         // `WorldStateFrame.lua:233-335` parse the `TW_HONOR`/`TW_BG` addon payloads with them.
         "explode",