Master talents: experience, points and four branches (Builder, Warlord, Warlock, Merchant) with a toolbar window

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/stats.rs

@@ -48,6 +48,8 @@ impl GameStats {
 impl Game {
     // counts for the master at this computer (another master's deeds count on his computer)
     pub(crate) fn count(&mut self, k: usize, n: f32) {
+        // every master's deeds bring him experience for his talents
+        self.add_master_xp(crate::talents::xp_for(k) * n);
         if self.me_side != self.local_side || self.demo.is_some() {
             return;
         }