feat(totems): right-click dismiss, Witchdoctor 3-slot cap, seconds counter

- Right-click on a populated totem slot calls DestroyTotem(slot).
  EnableMouse on the strip absorbs clicks (loses click-to-target on
  the totem-bar pixels only; health/power bar still targets normally).
- COA_CLASS_TOTEMS table overrides MAX_TOTEMS per class. WITCHDOCTOR
  capped to 3 so the 4th unused slot no longer renders. Easy to extend
  for any future custom totem classes.
- Integer-seconds countdown text centred on each slot. totemMonitor
  only repaints the FontString when the integer changes so OnUpdate
  stays cheap. Cleared on expiry / dismiss.

ShadowedUnitFrames/modules/totems.lua

@@ -2,6 +2,11 @@ local Totems = {}
 local totemColors = {}
 local MAX_TOTEMS = MAX_TOTEMS
 
+-- CoA: per-class slot count override (different from shaman's 4).
+local COA_CLASS_TOTEMS = {
+	WITCHDOCTOR = 3,
+}
+
 -- Death Knights untalented ghouls are guardians and are considered totems........... so set it up for them
 local playerClass = select(2, UnitClass("player"))
 if( playerClass == "DEATHKNIGHT" ) then
@@ -15,6 +20,9 @@ else
 	local hasTotems = (MAX_TOTEMS and MAX_TOTEMS > 1)
 		or (type(HasMultiCastActionBar) == "function" and HasMultiCastActionBar())
 		or playerClass == "SHAMAN"
+	if COA_CLASS_TOTEMS[playerClass] then
+		MAX_TOTEMS = COA_CLASS_TOTEMS[playerClass]
+	end
 	if( hasTotems ) then
 		ShadowUF:RegisterModule(Totems, "totemBar", ShadowUF.L["Totem bar"], true)
 	else
@@ -34,6 +42,20 @@ function Totems:OnEnable(frame)
 			totem:SetValue(0)
 			totem.id = MAX_TOTEMS == 1 and 1 or TOTEM_PRIORITIES[id]
 
+			-- Right-click dismisses the totem in this slot. EnableMouse on the strip
+			-- absorbs clicks here (loses click-to-target on the totem bar only).
+			totem:EnableMouse(true)
+			totem:SetScript("OnMouseUp", function(self, button)
+				if button == "RightButton" and self.have then
+					DestroyTotem(self.id)
+				end
+			end)
+
+			-- Seconds-remaining text, centred on the bar; updated by totemMonitor.
+			totem.timeText = totem:CreateFontString(nil, "OVERLAY", "GameFontNormalSmall")
+			totem.timeText:SetPoint("CENTER", totem, "CENTER", 0, 0)
+			totem.timeText:SetText("")
+
 			if( id > 1 ) then
 				totem:SetPoint("TOPLEFT", frame.totemBar.totems[id - 1], "TOPRIGHT", 1, 0)
 			else
@@ -86,10 +108,23 @@ end
 
 local function totemMonitor(self, elapsed)
 	local time = GetTime()
-	self:SetValue(self.endTime - time)
+	local remaining = self.endTime - time
+	self:SetValue(remaining)
+
+	if self.timeText then
+		local intSec = remaining > 0 and math.floor(remaining) or 0
+		if intSec ~= self.lastIntSec then
+			self.lastIntSec = intSec
+			self.timeText:SetText(intSec > 0 and intSec or "")
+		end
+	end
 
 	if( time >= self.endTime ) then
 		self:SetValue(0)
+		if self.timeText then
+			self.timeText:SetText("")
+			self.lastIntSec = nil
+		end
 		self:SetScript("OnUpdate", nil)
 	end
 end
@@ -113,6 +148,10 @@ function Totems:Update(frame)
 			indicator:SetScript("OnUpdate", nil)
 			indicator:SetMinMaxValues(0, 1)
 			indicator:SetValue(0)
+			if indicator.timeText then
+				indicator.timeText:SetText("")
+				indicator.lastIntSec = nil
+			end
 		end
 	end