Campaign of 30 missions: six against the rival masters Mossgrim and Lady Nightwell, islands, mana springs, sealed caves with chained creatures

- missions interleaved into one story (EN/DE), new epilogue, map sizes grow to 176x176
- islands in water or lava with treasure and/or a mana spring; rivers at least four tiles wide
- sealed caves with treasure and a chained creature that joins once the cave is claimed
- new goals: rival cores, mana springs, freed creatures
- rival messages name the masters; new progress key for the new mission order

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

src/ui.rs

@@ -452,7 +452,7 @@ impl Ui {
         }
         let mut segs: Vec<Vec<Part>> = vec![
             gold_seg,
-            vec![txt(tr("hud.mana"), MANA), Part::Gap, Part::Bar(g.mana / MANA_MAX, MANA), Part::Gap, txt(format!("{:<3}", g.mana as i32), TXT)],
+            vec![txt(tr("hud.mana"), MANA), Part::Gap, Part::Bar(g.mana / g.mana_max(), MANA), Part::Gap, txt(format!("{:<3}", g.mana as i32), TXT)],
             vec![txt(tr("hud.core"), RED), Part::Gap, Part::Bar(g.core_hp / CORE_HP, RED)],
             vec![txt(tr("hud.creatures"), TXT), Part::Gap, txt(format!("{}/{}", g.creature_count(), cap), TXT)],
             vec![txt(tr("hud.workers"), TXT), Part::Gap, txt(g.worker_count().to_string(), TXT)],
@@ -699,6 +699,9 @@ impl Ui {
                     Goal::Loot(n) => format!(" {}/{}", (g.loot as u32).min(n), n),
                     Goal::Towers => trf("goal.left", &[g.towers.iter().filter(|t| t.hero).count().to_string()]),
                     Goal::Survive(n) => format!(" {}/{}", g.wave.min(n), n),
+                    Goal::Rivals => trf("goal.left", &[g.rivals.iter().filter(|r| r.alive).count().to_string()]),
+                    Goal::Springs(n) => format!(" {}/{}", g.springs.min(n as usize), n),
+                    Goal::Freed(n) => format!(" {}/{}", g.freed.min(n), n),
                 };
                 let text = format!("{} {}{}", if done { "\u{221a}" } else { "\u{25ba}" }, crate::menu::goal_text(goal), progress);
                 for l in wrap(&text, gcols as usize - 4) {