fix: XP bar renders full and the tooltip reads "-5500 percent to go" (#1797)

Bug Fixes:
- Improved experience and level progress accuracy when handling level-change updates.
- Prevented analyser updates when no local player is available.
- Normalized level percentages for newer protocols, ensuring progress bars and tooltips display correct values.

modules/game_analyser/analyser.lua

@@ -544,7 +544,13 @@ function checkNumber(self, text)
 end
 
 function onLevelChange(localPlayer, value, percent)
-  XPAnalyser:setupLevel(value, percent)
+  -- See game_skills/skills.lua onLevelChange: the callback passes the level percent raw
+  -- (centipercent with GameLevelPercentU16, protocol >= 1520). Normalize it with
+  -- getLevelPercent() or the analyser bar renders full.
+  if not localPlayer then
+    return
+  end
+  XPAnalyser:setupLevel(value, localPlayer:getLevelPercent())
 end
 
 function managerDropTracker(itemId, checked)

modules/game_skills/skills.lua

@@ -1105,7 +1105,11 @@ function onLevelChange(localPlayer, value, percent)
     if not localPlayer then
         return
     end
-    percent = percent or localPlayer:getLevelPercent()
+    -- The C++ onLevelChange callback passes m_levelPercent raw, which is centipercent
+    -- (0-10000) once GameLevelPercentU16 is enabled (protocol >= 1520), not the 0-100 the
+    -- UI expects. getLevelPercent() normalizes it, so always use the getter: otherwise the
+    -- bar renders full and the tooltip reads "-5500 percent to go" at high levels.
+    percent = localPlayer:getLevelPercent()
     setSkillValue('level', comma_value(value))
     local text = tr('You have %s percent to go', 100 - percent)
     setSkillPercent('level', percent, text)