the addon arc: the AddOns folder opens

- benilla loads real 1.12 addons from Interface/AddOns — TOC, XML and Lua through one loader, with per-addon saved variables, Bindings.xml and the lifecycle events addons expect
- both AddOns screens are in: the character-select list with per-addon enable state, and the ESC menu's in-game list
- the API surface is measured, not guessed — a corpus harness runs hundreds of real 1.12 addons and ranks exactly which globals, templates and verbs they demand
- the Lua dialect is the client's own, read off the binary — 5.0 semantics with the 1.12 additions, and UI source files are bytes, not UTF-8

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

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

@@ -244,22 +244,31 @@ pub(super) fn install(lua: &Lua) -> mlua::Result<()> {
     // re-points the ButtonText to the current state's object each frame, so Enable/Disable and
     // hover swap the label's paint with no Lua involvement (the client's own behavior:
     // UIPanelButtonTemplate's gold/white/gray label states).
+    //
+    // Each takes the font OBJECT, its name, or nil, like `FontString:SetFontObject` — across the
+    // trio the corpus splits 5 object-form to 4 string-form, so accepting one shape only would
+    // break about half the callers, and nil clears the state back to the default. Because the
+    // state is stored as a NAME and re-resolved at every `extract`, a later mutation of that font
+    // object reaches these labels for free.
     m.set(
         "SetTextFontObject",
-        lua.create_function(|lua, (this, name): (Table, String)| {
-            with_button(lua, &this, |bs| bs.normal_font = Some(name))
+        lua.create_function(|lua, (this, font): (Table, Value)| {
+            let name = super::font::resolve("SetTextFontObject", &font)?;
+            with_button(lua, &this, |bs| bs.normal_font = name)
         })?,
     )?;
     m.set(
         "SetHighlightFontObject",
-        lua.create_function(|lua, (this, name): (Table, String)| {
-            with_button(lua, &this, |bs| bs.highlight_font = Some(name))
+        lua.create_function(|lua, (this, font): (Table, Value)| {
+            let name = super::font::resolve("SetHighlightFontObject", &font)?;
+            with_button(lua, &this, |bs| bs.highlight_font = name)
         })?,
     )?;
     m.set(
         "SetDisabledFontObject",
-        lua.create_function(|lua, (this, name): (Table, String)| {
-            with_button(lua, &this, |bs| bs.disabled_font = Some(name))
+        lua.create_function(|lua, (this, font): (Table, Value)| {
+            let name = super::font::resolve("SetDisabledFontObject", &font)?;
+            with_button(lua, &this, |bs| bs.disabled_font = name)
         })?,
     )?;