feat: more robust xp

src/app/tools/tankopedia/[id]/components/Model/TechTreeSection/index.tsx

@@ -64,7 +64,12 @@ export function TechTreeSection() {
     [master, lineIndex],
   );
   const totalXp = line.reduce(
-    (xp, id) => xp + (awaitedTankDefinitions[id].xp ?? 0),
+    (xp, id) =>
+      xp +
+      (awaitedTankDefinitions[id].xp === undefined ||
+      awaitedTankDefinitions[id].tier === 1
+        ? 0
+        : awaitedTankDefinitions[id].xp),
     0,
   );
   const totalCredits = line.reduce(
@@ -100,6 +105,7 @@ export function TechTreeSection() {
       <Flex direction="column" align="center">
         <Heading size="6">Tech tree</Heading>
 
+        {master.tier > 1 && (
           <Flex gap="4" align="center">
             <Text color="gray" wrap="nowrap">
               <Flex gap="1" align="center">
@@ -133,6 +139,7 @@ export function TechTreeSection() {
               </Flex>
             </Text>
           </Flex>
+        )}
       </Flex>
 
       <ScrollArea type="hover" scrollbars="horizontal" ref={container}>