Combat engine: swing-by-swing fights, Frontier and expeditions, trophies

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

README.md

@@ -13,9 +13,16 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
   construction (with masonry), cooking, leatherworking, herblore, combat,
   prayer and reconnaissance. Smiths also make hardware for builders, one kind
   per metal (copper rivets to rune locks), which fittings and buildings need.
-- **Combat:** fights cost HP (less when out-levelled or armoured); below half
-  health you eat food from your bank, and out of food you retreat, losing
-  nothing but the fight. HP recovers 25% an hour.
+- **Combat:** every fight is played out swing by swing: you and the enemy
+  each have HP, a swing timer, accuracy and a max hit, and swings hit, miss
+  or crit (power from level and gear aims and hits; armour dodges and soaks).
+  Below half health you eat from your bank; out of food you retreat, losing
+  nothing but the fight. HP recovers 25% an hour. The Combat page replays
+  the fight live. Fights are split into the Frontier (bandits, sabotage,
+  drilling, the city's troubles) and expeditions: Greenwood to start, then
+  one area per tier (Old Watchtower, Sunken Barrows, Iron Hills, Frostpeak,
+  Dragon's Spine), each with a golem, a troll, a spirit and a flyer that drop
+  trophies for stronger weapons, and a boss (the dragons at the top).
 - **Tiers:** six RuneScape-style tiers (copper, iron, steel, mithril,
   adamant, rune at levels 1–75) of ore, trees (up to enchanted) and hides (deer,
   boar and bear from hunting; green, blue and red dragonhide from fighting