coa.5: refactor char display into guarded helpers; fix missed sites; restore login scan

- Extract AddCharacterTooltipHeader() + SetCharacterRowNameLevel() (Altoholic.lua);
  nil-guards centralized, callers in AccountSummary/Activity/BagUsage/Skills/tooltip.
- Fix sites the manual sweep missed: Skills.lua (row + skill ranks), Keys.lua x3,
  ShowClassIcons sort (Altoholic.lua:705, getters bypass their own or-0 via the wrapper).
- Restore login scan: OnPlayerAlive was ghost-only (fdcb25a) so iLvl never populated;
  now scans once per session. Removed dated DEBUG leftovers.

Altoholic/Altoholic.lua

@@ -249,10 +249,12 @@ end
 
 
 -- *** Event Handlers ***
+local hasScannedThisSession
 local function OnPlayerAlive()
-	-- print("Altoholic.lua") -- DEBUG 2025 07 21
-	if not UnitIsGhost("player") then return end -- only scan if player released spirit and went to graveyard
-	
+	-- CoA: scan once at login (see DataStore_Inventory / commit fdcb25a). FRIENDLIST_UPDATE also
+	-- keeps the friends list fresh; this just guarantees an initial scan without rescanning on res.
+	if hasScannedThisSession then return end
+	hasScannedThisSession = true
 	ScanFriends()
 end
 
@@ -585,6 +587,22 @@ function addon:GetDelayInDays(delay)
 	return floor((time() - delay) / 86400)
 end
 
+-- CoA: shared, nil-safe character display helpers.
+-- DataStore char-based getters return *no value* for any module that hasn't
+-- scanned a given character (DataStore.lua: "if not arg1.lastUpdate then return end").
+-- Fresh alts have partial per-module data, so every field is guarded here once
+-- instead of being copy-pasted (and missed) across the frames.
+function Altoholic:AddCharacterTooltipHeader(character)
+	AltoTooltip:AddDoubleLine(DS:GetColoredCharacterName(character) or "?", DS:GetColoredCharacterFaction(character) or "")
+	AltoTooltip:AddLine(format("%s %s |r%s %s", L["Level"],
+		GREEN..(DS:GetCharacterLevel(character) or 0), DS:GetCharacterRace(character) or "", DS:GetCharacterClass(character) or ""), 1, 1, 1)
+end
+
+function Altoholic:SetCharacterRowNameLevel(entry, i, icon, character)
+	_G[entry..i.."NameNormalText"]:SetText(icon .. format("%s (%s)", DS:GetColoredCharacterName(character) or "?", DS:GetCharacterClass(character) or ""))
+	_G[entry..i.."Level"]:SetText(GREEN .. (DS:GetCharacterLevel(character) or 0))
+end
+
 function Altoholic:FormatDelay(timeStamp)
 	-- timeStamp = value when time() was last called for a given variable (ex: last time the mailbox was checked)
 	if not timeStamp then
@@ -679,21 +697,18 @@ function Altoholic:ShowClassIcons()
 	local realm, account = Altoholic:GetCurrentRealm()
 	
 	
-	-- ####################
+	-- Sort characters by level first, then average item level. The getters yield no value
+	-- for alts whose Characters/Inventory module hasn't scanned them, so default [3]/[4] to 0.
 	local CharNameList = DS:GetCharacters(realm, account)
 	local CharNameList_sort = {}
-	
+
 	for k,v in pairs(CharNameList) do
-	   table.insert(CharNameList_sort,{k,v, DS:GetAverageItemLevel(v), DS:GetCharacterLevel(v)})
+	   table.insert(CharNameList_sort, {k, v, DS:GetAverageItemLevel(v) or 0, DS:GetCharacterLevel(v) or 0})
 	end
-	
-	-- sort for level first, avg iLevel secondly
+
 	table.sort(CharNameList_sort, function(a,b) return b[3]+b[4]*10000 < a[3]+a[4]*10000 end)
-	-- DEBUG_CHARLIST = CharNameList
-	-- print("-- altoholic DEBUG READY")
-	-- ####################
-	
-	
+
+
 	-- for characterName, character in pairs(DS:GetCharacters(realm, account)) do
 	for _,charTbl in ipairs(CharNameList_sort) do
 		local characterName, character = charTbl[1], charTbl[2]
@@ -763,10 +778,7 @@ function Altoholic:DrawCharacterTooltip(self, charName)
 	
 	AltoTooltip:SetOwner(self, "ANCHOR_LEFT");
 	AltoTooltip:ClearLines();
-	AltoTooltip:AddDoubleLine(DS:GetColoredCharacterName(character), DS:GetColoredCharacterFaction(character))
-
-	AltoTooltip:AddLine(format("%s %s |r%s %s", L["Level"],
-		GREEN..(DS:GetCharacterLevel(character) or 0), DS:GetCharacterRace(character) or "",	DS:GetCharacterClass(character) or ""),1,1,1)
+	Altoholic:AddCharacterTooltipHeader(character)
 
 	local zone, subZone = DS:GetLocation(character)
 	AltoTooltip:AddLine(format("%s: %s |r(%s|r)", L["Zone"], GOLD..(zone or "?"), GOLD..(subZone or "")),1,1,1)