fix: prevent minimap-button C stack overflow, guard legacy options

The custom minimap-button hider re-HookScript'd OnEnter/OnLeave on every
button each 1s ticker cycle and re-hooked the Minimap OnUpdate on every
mouse enter. HookScript chains closures, so the handler chain grew until
firing it overflowed the C stack. Hook each button and the OnUpdate driver
only once via guard flags.

Also guard InterfaceOptionsControlsPanelAutoLootCorpse, absent on the CoA
client's reworked Controls panel.

Leatrix_Plus.lua

@@ -2228,11 +2228,18 @@ function LeaPlusLC:Isolated()
                 --===== Disable Auto Loot button in Interface menu and add tooltip to it. =====--
                 -- if aura_env.config["autoLootGlobalEnabled"] then
 
-                InterfaceOptionsControlsPanelAutoLootCorpse:Disable()
+                -- The CoA client's reworked Controls panel may not expose
+                -- these legacy globals; guard each access so a missing widget
+                -- cannot abort the login event handler.
+                if InterfaceOptionsControlsPanelAutoLootCorpse then
+                    InterfaceOptionsControlsPanelAutoLootCorpse:Disable()
+                end
 
                 local autoLootText = InterfaceOptionsControlsPanelAutoLootCorpseText
-                autoLootText:SetText("Auto Loot option is controlled by Leatrix Plus.")
-                autoLootText:SetAlpha(0.6)
+                if autoLootText then
+                    autoLootText:SetText("Auto Loot option is controlled by Leatrix Plus.")
+                    autoLootText:SetAlpha(0.6)
+                end
 
                 -- print("Auto Loot Set")
 
@@ -6084,7 +6091,12 @@ function LeaPlusLC:Player()
                     -- Set hover scripts for all buttons
                     local function SetupButtonHoverScripts()
                         for _, button in pairs(minimapButtons) do
-                            if button then
+                            -- Hook each button only once. The ticker below runs every
+                            -- second; HookScript chains its closures, so re-hooking each
+                            -- cycle accumulates hundreds of nested handlers and eventually
+                            -- overflows the C stack when OnEnter/OnLeave fires.
+                            if button and not button.leaPlusHoverHooked then
+                                button.leaPlusHoverHooked = true
                                 button:HookScript("OnEnter", function()
                                     -- Show all buttons when hovering over one
                                     for _, btn in pairs(minimapButtons) do
@@ -6192,6 +6204,10 @@ function LeaPlusLC:Player()
 
                     -- This function is called when the mouse enters the minimap area.
                     local function Minimap_OnEnter()
+                        -- Install the OnUpdate driver only once. Hooking it on every
+                        -- minimap enter chains closures and overflows the C stack.
+                        if Minimap.leaPlusHideButtonsOnUpdate then return end
+                        Minimap.leaPlusHideButtonsOnUpdate = true
                         -- If the mouse is over a child, we show all minimap buttons.
                         Minimap:HookScript("OnUpdate", function(self, elapsed)
                             local numChildren = Minimap:GetNumChildren()