fix for nameplates and castbars

Removed SuperWoW dependency from castbar and nameplate cast detection. Cast interrupts (sidestep, spell failed) now correctly stop the castbar by setting event = "FAIL" / event = "CAST" on the libdebuff cache entry instead of nil-ing it — preventing stale local references from keeping the castbar alive. UnitCastingInfo fallback is retained for non-Nampower environments but no longer overrides Nampower cast state.

modules/castbar.lua

@@ -1,5 +1,4 @@
 pfUI:RegisterModule("castbar", "vanilla", function ()
-  local superwow_active = HasSuperWoW()
 
   local font = C.castbar.use_unitfonts == "1" and pfUI.font_unit or pfUI.font_default
   local font_size = C.castbar.use_unitfonts == "1" and C.global.font_unit_size or C.global.font_size
@@ -108,43 +107,41 @@ pfUI:RegisterModule("castbar", "vanilla", function ()
       local focusGuid = nil
       if this.unitstr and string.find(this.unitstr, "^0x") then
         focusGuid = this.unitstr
+      elseif this.unitstr and this.unitstr ~= "player" then
+        local _, guid = UnitExists(this.unitstr)
+        if guid then focusGuid = guid end
       end
 
       -- Try libdebuff_casts first for GUID-based units (works with Turtle GUID + Nampower events)
       local cast, nameSubtext, text, texture, startTime, endTime
+      local castBlocked = false
       if focusGuid and pfUI.libdebuff_casts and pfUI.libdebuff_casts[focusGuid] then
         local castData = pfUI.libdebuff_casts[focusGuid]
-        if castData.event == "START" and castData.endTime and castData.endTime > GetTime() then
+        if castData.event == "CAST" or castData.event == "FAIL" then
+          castBlocked = true
+          pfUI.libdebuff_casts[focusGuid] = nil
+        elseif castData.event == "START" and castData.endTime and castData.endTime > GetTime() then
           cast = castData.spellName
           texture = castData.icon
-          startTime = castData.startTime * 1000  -- libdebuff uses seconds, castbar expects milliseconds
+          startTime = castData.startTime * 1000
           endTime = castData.endTime * 1000
-          nameSubtext = ""  -- Rank info not available in libdebuff_casts
+          nameSubtext = ""
         end
       end
 
-      -- Fallback: transform unitstrings to unit guids when SuperWoW is active
-      -- SuperWoW stores cast data by GUID for all units INCLUDING player
-      -- BUT: For player casts, we need to use libcast data because it handles pushback correctly
       local useLibcastForPlayer = this.unitstr == "player"
-      
-      if not cast and superwow_active and this.unitstr and not useLibcastForPlayer then
-        local _, guid = UnitExists(this.unitstr)
-        query = guid or query
-      end
-      
+
       -- For player: use player name to query libcast.db directly
       if not cast and useLibcastForPlayer then
         query = UnitName("player")
       end
 
-      -- Fallback: Try UnitCastingInfo if we haven't found cast data yet
-      if not cast and UnitCastingInfo then
+      -- Fallback: UnitCastingInfo only when no focusGuid (Nampower not available for this unit)
+      if not cast and not castBlocked and not focusGuid and UnitCastingInfo then
         cast, nameSubtext, text, texture, startTime, endTime, isTradeSkill = UnitCastingInfo(query)
       end
-      
-      if not cast and UnitChannelInfo then
-        -- scan for channel spells if no cast was found
+
+      if not cast and not castBlocked and not focusGuid and UnitChannelInfo then
         channel, nameSubtext, text, texture, startTime, endTime, isTradeSkill = UnitChannelInfo(this.unitstr or this.unitname)
         cast = channel
       end