feat: built-in historical scenarios — Battle of Manzikert, Fall of Constantinople

[nikolareljin]

Summary

Bundle historically-accurate scenario JSON files for the two most iconic Byzantine military events, to be loaded via the ScenarioLoader (see #50).

Scenarios to bundle

1. Battle of Manzikert (August 26, 1071)

• Location: Manzikert (modern Malazgirt, Turkey) — tile_x: 176, tile_y: 73
• Byzantine commander: Romanos IV Diogenes
• Seljuk commander: Alp Arslan
• Outcome: Byzantine catastrophic defeat — Romanos captured, Anatolia opened to Turkic settlement
• Forces: Byzantine (cataphracts, tagmata, Varangian Guard, mercenaries) vs. Seljuk (horse archers, heavy cavalry)
• Source: neobyzantine-org timeline event battle-of-manzikert-1071

2. Fall of Constantinople (May 29, 1453)

• Location: Constantinople — tile_x: 146, tile_y: 68
• Byzantine commander: Constantine XI Palaiologos
• Ottoman commander: Mehmed II
• Forces: Byzantine (skeleton garrison, Genoese allies, Greek Fire ships) vs. Ottoman (massive artillery, Janissaries, naval blockade)
• Source: neobyzantine-org timeline event fall-of-constantinople-1453

File locations

assets/scenarios/
├── manzikert-1071.json
└── fall-of-constantinople-1453.json

UI integration

Scenario selection dropdown in start screen (see #50):

• "Battle of Manzikert (1071)" → loads Seljuk vs. Byzantine confrontation
• "Fall of Constantinople (1453)" → loads final Byzantine defense scenario

Historical notes

These scenarios should match the CENTURY_TOWN_CONTROL_OVERRIDES already defined in js/state.js for the 11th-century era. Alp Arslan is already defined as a playable leader (state.js:LEADER_START_PROFILES).

Related

• Requires feat: JSON scenario import — load historical battle positions from neobyzantine-org #50 (ScenarioLoader) to load these files
• Data sourced from neobyzantine-org (Phase 10 game export API)