GUID replacements

* Replace all `local _, guid = UnitExists(unit)` with `GetUnitGUID(unit)` (Nampower 3.0.0+)
* Bump minimum required Nampower version to 3.0.0

modules/actionbar.lua

@@ -1007,7 +1007,7 @@ pfUI:RegisterModule("actionbar", "vanilla", function ()
       -- Prowl Spell IDs: 5215 (Rank 1), 6783 (Rank 2), 9913 (Rank 3)
       if event == "UNIT_CASTEVENT" then
         local guid, target, cEvent, spellId = arg1, arg2, arg3, arg4
-        local _, playerGuid = UnitExists("player")
+        local playerGuid = GetUnitGUID("player")
         if guid == playerGuid and cEvent == "CAST" then
           if spellId == 5215 or spellId == 6783 or spellId == 9913 then
             -- Prowl cast detected

modules/castbar.lua

@@ -8,8 +8,8 @@ pfUI:RegisterModule("castbar", "vanilla", function ()
   -- Helper function for castbar timer formatting
   local function FormatCastbarTime(value)
     if C.unitframes.castbardecimals == "1" then
-      -- 1 decimal, always floor
-      return string.format("%.1f", floor(value * 10) / 10)
+      -- 1 decimal, round half up (matches Blizzard spellbook display)
+      return string.format("%.1f", floor(value * 10 + 0.5) / 10)
     else
       -- 2 decimals (default)
       return string.format("%.2f", value)
@@ -108,7 +108,7 @@ pfUI:RegisterModule("castbar", "vanilla", function ()
       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)
+        local guid = GetUnitGUID(this.unitstr)
         if guid then focusGuid = guid end
       end
 
@@ -176,7 +176,7 @@ pfUI:RegisterModule("castbar", "vanilla", function ()
             if pfUI.libdebuff_casts or pfUI.libdebuff_item_icons then
               local castGuid = nil
               if this.unitstr and UnitExists then
-                local _, guid = UnitExists(this.unitstr)
+                local guid = GetUnitGUID(this.unitstr)
                 castGuid = guid
               end
               if castGuid then

modules/focus.lua

@@ -51,7 +51,7 @@ function SlashCmdList.PFFOCUS(msg)
   if msg ~= "" then
     -- Try to resolve GUID via short target swap
     if UnitExists then
-      local _, prevGUID = UnitExists("target")
+      local prevGUID = GetUnitGUID("target")
       local prevPlayer = UnitIsUnit("target", "player")
 
       -- Suppress "Unknown unit" errors during targeting attempts (fired async)
@@ -59,7 +59,7 @@ function SlashCmdList.PFFOCUS(msg)
 
       -- Try exact match first, then prefix match via /tar
       TargetByName(msg, true)
-      local _, guid = UnitExists("target")
+      local guid = GetUnitGUID("target")
 
       if not guid or guid == "0x0000000000000000" then
         -- Fallback: prefix match (like /tar storm -> Stormwind Guard)
@@ -94,7 +94,7 @@ function SlashCmdList.PFFOCUS(msg)
   else
     -- No msg: use current target
     if UnitExists then
-      local _, guid = UnitExists("target")
+      local guid = GetUnitGUID("target")
       if guid and guid ~= "0x0000000000000000" then
         SetFocusByGUID(guid)
         return
@@ -143,11 +143,11 @@ function SlashCmdList.PFCASTFOCUS(msg)
 
   -- For lua functions with GUID: short target swap via GUID
   if hasGUID and func then
-    local _, currentGUID = UnitExists("target")
+    local currentGUID = GetUnitGUID("target")
     local isPlayer = UnitIsUnit("target", "player")
 
     TargetUnit(focusGUID)
-    local _, newGUID = UnitExists("target")
+    local newGUID = GetUnitGUID("target")
 
     if newGUID ~= focusGUID then
       -- Could not target focus, restore and fail

modules/nameplates.lua

@@ -101,7 +101,7 @@ pfUI:RegisterModule("nameplates", "vanilla", function ()
   local wipe = wipe or function(t) for k in pairs(t) do t[k] = nil end end
 
   -- Player GUID for filtering
-  local _, PlayerGUID = UnitExists("player")
+  local PlayerGUID = GetUnitGUID("player")
 
   -- ============================================================================
   -- OPTIMIZATION: Config caching
@@ -549,7 +549,7 @@ nameplates:RegisterEvent("ZONE_CHANGED_NEW_AREA")
 
     elseif event == "PLAYER_TARGET_CHANGED" then
       -- Flag target plate for update via GUID registry
-      local _, targetGuid = UnitExists("target")
+      local targetGuid = GetUnitGUID("target")
       if targetGuid then
         local plate = guidRegistry[targetGuid]
         if plate and plate.nameplate then
@@ -561,7 +561,7 @@ nameplates:RegisterEvent("ZONE_CHANGED_NEW_AREA")
 
     elseif event == "PLAYER_COMBO_POINTS" or event == "UNIT_COMBO_POINTS" then
       -- Only flag the target plate for combo point update
-      local _, targetGuid = UnitExists("target")
+      local targetGuid = GetUnitGUID("target")
       if targetGuid then
         local plate = guidRegistry[targetGuid]
         if plate and plate.nameplate then
@@ -1504,7 +1504,7 @@ nameplates:RegisterEvent("ZONE_CHANGED_NEW_AREA")
       if isTargetPlate then
         targetGUID = state and state.targetGuid
         if not targetGUID then
-          local _, guid = UnitExists("target")
+          local guid = GetUnitGUID("target")
           targetGUID = guid
         end
       end
@@ -1571,7 +1571,7 @@ nameplates:RegisterEvent("ZONE_CHANGED_NEW_AREA")
             channel, nameSubtext, text, texture, startTime, endTime, isTradeSkill = UnitChannelInfo("target")
           end
         elseif unitstr then
-          local _, guid = UnitExists(unitstr)
+          local guid = GetUnitGUID(unitstr)
           local q = guid or unitstr
           cast, nameSubtext, text, texture, startTime, endTime, isTradeSkill = UnitCastingInfo(q)
           if not cast then

modules/nampower.lua

@@ -591,7 +591,7 @@ pfUI:RegisterModule("nampower", "vanilla", function ()
 
       -- Get base mana using Nampower's GetUnitField
       local baseMana, baseMaxMana
-      local _, guid = UnitExists(unit)
+      local guid = GetUnitGUID(unit)
 
       if guid then
         baseMana = GetUnitField(guid, "power1")

modules/raid.lua

@@ -121,7 +121,7 @@ pfUI:RegisterModule("raid", "vanilla:tbc", function ()
         local frame = pfUI.uf.raid[i]
         if frame and frame.id and frame.id > 0 then
           local unit = "raid" .. frame.id
-          local _, newGuid = UnitExists(unit)
+          local newGuid = GetUnitGUID(unit)
           local oldGuid = tracker.frameToGuid[frame]
           
           if newGuid ~= oldGuid then

modules/superwow.lua

@@ -266,7 +266,7 @@ pfUI:RegisterModule("superwow", "vanilla", function ()
     if event == "PLAYER_ENTERING_WORLD" then
       -- Cache player GUID
       if UnitExists then
-        local _, guid = UnitExists("player")
+        local guid = GetUnitGUID("player")
         playerGuid = guid
       end
       return

modules/swingtimer.lua

@@ -575,7 +575,7 @@ pfUI:RegisterModule("swingtimer", "vanilla:tbc", function ()
     elseif event == "PLAYER_ENTERING_WORLD" then
       local _, class = UnitClass("player")
       isWarrior  = (class == "WARRIOR")
-      local _, guid = UnitExists("player")
+      local guid = GetUnitGUID("player")
       playerGUID = guid
       UpdateWeaponSpeeds()
       RebuildQueueSlotCache()