feat: HideCooldownErrors / MuteErrorSpeech option

Adds the 'Hide Ability not ready warnings' option to FasterLootPanel and
wires up a hook on UIErrorsFrame.AddMessage that suppresses the red
'Ability not ready', 'Spell is not ready' and 'Another action is in
progress' messages when the option is on. Other errors (out of range,
line of sight, etc.) still appear normally.

Includes the saved-var loaders / setters in eventHandler and the default
'Off' init in LeaPlusLC:Isolated().

Leatrix_Plus.lua

@@ -1784,6 +1784,8 @@ function LeaPlusLC:Isolated()
         LeaPlusLC:MakeCB(FasterLootPanel, "SmallerErrorFrame", "Smaller Error Frame", 16, -92, false, "If checked, your red error text frame, will be only one line long.")
         LeaPlusLC:MakeCB(FasterLootPanel, "FasterErrorFrame", "Faster Error Frame", 16, -112, false, "If checked, your red error text frame, will be faster to fade|n(1 second instead of 5).")
         LeaPlusLC:MakeCB(FasterLootPanel, "NoLootWorldforged", "Skip auto-loot for Worldforged items", 16, -132, false, "If checked, worldforged items will be left in the loot window instead of being auto-looted, so you can decide which ones to keep.")
+        LeaPlusLC:MakeCB(FasterLootPanel, "HideCooldownErrors", "Hide 'Ability not ready' warnings", 16, -152, false, "If checked, the red 'Ability not ready', 'Spell is not ready' and 'Another action is in progress' messages are suppressed.|nOther errors (out of range, line of sight, etc.) still appear.")
+        LeaPlusLC:MakeCB(FasterLootPanel, "MuteErrorSpeech", "Mute error sound", 16, -172, false, "If checked, the spoken error sound (e.g. \"I can't do that yet\") is silenced.|nToggles the Sound_EnableErrorSpeech CVar.")
 
         LeaPlusLC:MakeTx(FasterLootPanel, "Full Inventory Sound", 356, -72)
         LeaPlusLC:MakeSL(FasterLootPanel, "FullInvSound", "Drag to set the desired sound played when your inventory is Full. Set 0 to disable sound.", 0, 3, 1, 356, -92, "%.0f")
@@ -1824,9 +1826,35 @@ function LeaPlusLC:Isolated()
         end
         SetErroFrameFadeTime()
 
+        --===== Hook UIErrorsFrame.AddMessage once to suppress cooldown nag when toggled on =====--
+        if not LeaPlusLC.cooldownErrorFilterInstalled then
+            local origAddMessage = UIErrorsFrame.AddMessage
+            UIErrorsFrame.AddMessage = function(self, msg, ...)
+                if LeaPlusLC["HideCooldownErrors"] == "On"
+                    and (msg == SPELL_FAILED_NOT_READY
+                      or msg == ERR_ABILITY_COOLDOWN
+                      or msg == SPELL_FAILED_SPELL_IN_PROGRESS
+                      or msg == SPELL_FAILED_ITEM_NOT_READY) then
+                    return
+                end
+                return origAddMessage(self, msg, ...)
+            end
+            LeaPlusLC.cooldownErrorFilterInstalled = true
+        end
+
+        local function SetMuteErrorSpeech()
+            if LeaPlusLC["MuteErrorSpeech"] == "On" then
+                SetCVar("Sound_EnableErrorSpeech", 0)
+            else
+                SetCVar("Sound_EnableErrorSpeech", 1)
+            end
+        end
+        SetMuteErrorSpeech()
+
         LeaPlusCB["FullInvSound"]:HookScript("OnValueChanged", SetFullInvSliderText)
         LeaPlusCB["SmallerErrorFrame"]:HookScript("OnClick", SetErrorFrameHeight)
         LeaPlusCB["FasterErrorFrame"]:HookScript("OnClick", SetErroFrameFadeTime)
+        LeaPlusCB["MuteErrorSpeech"]:HookScript("OnClick", SetMuteErrorSpeech)
 
 
 
@@ -1848,9 +1876,12 @@ function LeaPlusLC:Isolated()
             LeaPlusLC["SmallerErrorFrame"] = "Off"
             LeaPlusLC["FasterErrorFrame"] = "Off"
             LeaPlusLC["NoLootWorldforged"] = "Off"
+            LeaPlusLC["HideCooldownErrors"] = "Off"
+            LeaPlusLC["MuteErrorSpeech"] = "Off"
             LeaPlusLC["FullInvSound"] = 1
             UIErrorsFrame:SetHeight(60)
             UIErrorsFrame:SetTimeVisible(5)
+            SetCVar("Sound_EnableErrorSpeech", 1)
             -- Refresh panel
             FasterLootPanel:Hide();
             FasterLootPanel:Show()
@@ -17097,9 +17128,11 @@ local function eventHandler(self, event, arg1, arg2, ...)
             LeaPlusLC:LoadVarNum("ViewPortResizeBottom", 0, 0, 300)        -- Resize bottom border
             LeaPlusLC:LoadVarNum("ViewPortAlpha", 0, 0, 0.9)            -- Border alpha
             LeaPlusLC:LoadVarNum("FullInvSound", 1, 0, 3)
-            LeaPlusLC:LoadVarChk("SmallerErrorFrame", "Off")            -- Release in PvP Exclude Alterac Valley
-            LeaPlusLC:LoadVarChk("FasterErrorFrame", "Off")            -- Release in PvP Exclude Alterac Valley
+            LeaPlusLC:LoadVarChk("SmallerErrorFrame", "Off")            -- Smaller error frame
+            LeaPlusLC:LoadVarChk("FasterErrorFrame", "Off")             -- Faster error frame
             LeaPlusLC:LoadVarChk("NoLootWorldforged", "Off")            -- CoA: skip auto-loot for worldforged items
+            LeaPlusLC:LoadVarChk("HideCooldownErrors", "Off")           -- Hide "Ability not ready" red text
+            LeaPlusLC:LoadVarChk("MuteErrorSpeech", "Off")              -- Mute spoken error sound
 
 
             LeaPlusLC:LoadVarChk("NoRestedEmotes", "Off")                -- Silence rested emotes
@@ -17551,8 +17584,10 @@ local function eventHandler(self, event, arg1, arg2, ...)
         LeaPlusDB["ViewPortAlpha"] = LeaPlusLC["ViewPortAlpha"]
         LeaPlusDB["FullInvSound"] = LeaPlusLC["FullInvSound"]
         LeaPlusDB["SmallerErrorFrame"] = LeaPlusLC["SmallerErrorFrame"]
-        LeaPlusDB["FasterErrorFrame"] = LeaPlusLC["SmallerErrorFrame"]
+        LeaPlusDB["FasterErrorFrame"] = LeaPlusLC["FasterErrorFrame"]
         LeaPlusDB["NoLootWorldforged"] = LeaPlusLC["NoLootWorldforged"]
+        LeaPlusDB["HideCooldownErrors"] = LeaPlusLC["HideCooldownErrors"]
+        LeaPlusDB["MuteErrorSpeech"] = LeaPlusLC["MuteErrorSpeech"]
 
         LeaPlusDB["NoRestedEmotes"] = LeaPlusLC["NoRestedEmotes"]
         LeaPlusDB["MuteGameSounds"] = LeaPlusLC["MuteGameSounds"]