phase 6: school data, run state, meta-progression, crisis system

- Add school data (Alchemist: H, O, C, Na, S, Fe starting kit)
- Add run cycle types: phases, escalation, crisis, body composition
- Implement run state management (create, advance phase, discoveries, spores)
- Implement meta-progression (codex, spore accumulation, run history)
- Implement crisis system (Chemical Plague with neutralization)
- Add IndexedDB persistence for meta state
- 42 new tests (335 total)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/run/crisis.ts

@@ -0,0 +1,85 @@
+/**
+ * Crisis System — Chemical Plague
+ *
+ * When escalation reaches its threshold, a crisis activates.
+ * The Chemical Plague poisons the atmosphere — player must craft
+ * the correct neutralizing compound to stop it.
+ */
+
+import type { CrisisConfig } from './types';
+
+// ─── Chemical Plague Configuration ───────────────────────────────
+
+export const CHEMICAL_PLAGUE: CrisisConfig = {
+  type: 'chemical-plague',
+  name: 'Chemical Plague',
+  nameRu: 'Химическая Чума',
+  description: 'A chain reaction is poisoning the atmosphere. Neutralize it with the right compound!',
+  descriptionRu: 'Цепная реакция отравляет атмосферу. Нейтрализуй правильным соединением!',
+  triggerThreshold: 0.8,
+  neutralizer: 'CaO',       // Calcium oxide (quicklime) — absorbs acid gases
+  neutralizeAmount: 3,       // need 3 units to fully neutralize
+};
+
+// ─── Crisis State ────────────────────────────────────────────────
+
+export interface CrisisState {
+  config: CrisisConfig;
+  active: boolean;
+  /** Progress 0.0–1.0 — at 1.0 the world is fully poisoned */
+  progress: number;
+  resolved: boolean;
+  /** How many neutralizer units have been applied */
+  neutralizeApplied: number;
+}
+
+/** Damage growth rate per second during active crisis */
+const CRISIS_DAMAGE_RATE = 0.01; // reaches 1.0 in ~100 seconds
+
+/** Create a new crisis state from config */
+export function createCrisisState(config: CrisisConfig): CrisisState {
+  return {
+    config,
+    active: true,
+    progress: 0,
+    resolved: false,
+    neutralizeApplied: 0,
+  };
+}
+
+/** Advance crisis damage over time */
+export function applyCrisisDamage(crisis: CrisisState, deltaMs: number): void {
+  if (!crisis.active || crisis.resolved) return;
+  const deltaSec = deltaMs / 1000;
+  crisis.progress = Math.min(1.0, crisis.progress + CRISIS_DAMAGE_RATE * deltaSec);
+}
+
+/** Attempt to neutralize the crisis with a compound. Returns true if correct compound. */
+export function attemptNeutralize(
+  crisis: CrisisState,
+  compoundId: string,
+  amount: number,
+): boolean {
+  if (compoundId !== crisis.config.neutralizer) return false;
+  if (crisis.resolved) return true;
+
+  crisis.neutralizeApplied += amount;
+
+  // Reduce progress proportionally
+  const reductionPerUnit = 1.0 / crisis.config.neutralizeAmount;
+  crisis.progress = Math.max(0, crisis.progress - amount * reductionPerUnit);
+
+  // Check if fully neutralized
+  if (crisis.neutralizeApplied >= crisis.config.neutralizeAmount) {
+    crisis.resolved = true;
+    crisis.active = false;
+    crisis.progress = 0;
+  }
+
+  return true;
+}
+
+/** Check if crisis has been resolved */
+export function isCrisisResolved(crisis: CrisisState): boolean {
+  return crisis.resolved;
+}