feat: Resources & Industry — per-region resource profiles + industry LLM lever (v0.36.0, #59)

- scripts/build-region-resources.mjs: deterministic, idempotent builder →
  public/region-resources.json (1,800 entries; FNV-1a hash × area factor, 0–1, 2dp)
- server/regions.ts: hasResources()/resourceOf() optional-manifest loader
- shared/types.ts: RegionResources, IndustryType/INDUSTRY_TYPES, IndustryProject,
  GameState.industry
- shared/protocol.ts: IndustryOps, TurnResult.industry, deriveNationResources
  (area×population-weighted average, 2dp)
- server/engine.ts: isIndustryType, validateIndustryOps, applyIndustryOps
  (per-region SET, first-declared-type wins), applyIndustryEffects
  (INDUSTRY_ECONOMY_BONUS=1, +1 when region industry≥0.5; sole-owner only;
  0/2+ owner regions kept but no boost; re-derive after), system+user prompt
  contract lines, runTurn resourceOf opt, nationResources in user payload
- server/db.ts: legacy-row industry default migration
- server/stub.ts: industry:{projects:[]} in stub result; resources/industry
  in StubPayload (never read)
- server/index.ts: resourceOf wired to jump route
- All test fixtures updated; new describe blocks in engine.test.ts,
  protocol.test.ts, regions.test.ts, db.test.ts
- CHANGELOG.md v0.36.0, AGENTS.md docs, package.json 0.36.0

Fixes #59

server/protocol.test.ts

@@ -2,6 +2,7 @@ import { describe, expect, it } from 'vitest';
 import {
   canConquer,
   CONQUEST_MILITARY_MARGIN,
+  deriveNationResources,
   deriveNationStats,
   migrateRegionStats,
   seedRegionStats,
@@ -44,6 +45,7 @@ function mkState(
     wars: [],
     trades: [],
     embargoes: [],
+    industry: [],
   };
   if (regionStats !== undefined) base.regionStats = regionStats as GameState['regionStats'];
   else delete (base as { regionStats?: unknown }).regionStats; // simulate a legacy row
@@ -139,6 +141,81 @@ describe('deriveNationStats', () => {
   });
 });
 
+// --- deriveNationResources ---------------------------------------------------
+
+describe('deriveNationResources (v0.36.0 #59)', () => {
+  const prof: Record<string, { oil: number; iron: number; food: number; industry: number }> = {
+    a: { oil: 0.2, iron: 0.2, food: 0.2, industry: 0.2 },
+    b: { oil: 0.8, iron: 0.8, food: 0.8, industry: 0.8 },
+  };
+  const geo: Record<string, { area: number; population: number }> = {
+    a: { area: 100, population: 1000 },
+    b: { area: 1000, population: 1000 },
+  };
+
+  it('weights by area×population: the larger region dominates the average', () => {
+    // a: weight 100×1000=100000, b: weight 1000×1000=1000000
+    // → (0.2×1e5 + 0.8×1e6)/1.1e6 = 82/110 = 0.7454… → 0.75 on every axis
+    expect(deriveNationResources(['a', 'b'], (k) => prof[k], (k) => geo[k])).toEqual({
+      oil: 0.75, iron: 0.75, food: 0.75, industry: 0.75,
+    });
+  });
+
+  it('degrades to a uniform (unweighted) average without geo: equal weights', () => {
+    // equal weights 1,1 → the true mean 0.5 on every axis
+    expect(deriveNationResources(['a', 'b'], (k) => prof[k])).toEqual({
+      oil: 0.5, iron: 0.5, food: 0.5, industry: 0.5,
+    });
+    // same when geoOf is provided but returns undefined for the keys (missing geo)
+    expect(deriveNationResources(['a', 'b'], (k) => prof[k], () => undefined)).toEqual({
+      oil: 0.5, iron: 0.5, food: 0.5, industry: 0.5,
+    });
+  });
+
+  it('skips a region key that has no resource-profile entry', () => {
+    // b has no profile → only a is counted → a's values
+    const out = deriveNationResources(['a', 'b'], (k) => (k === 'a' ? prof.a : undefined), (k) => geo[k]);
+    expect(out).toEqual(prof.a);
+  });
+
+  it('returns the zero profile when none of the owned regions has a profile', () => {
+    expect(deriveNationResources(['a', 'b'], () => undefined)).toEqual({
+      oil: 0, iron: 0, food: 0, industry: 0,
+    });
+  });
+
+  it('a single region yields exactly that region\'s profile', () => {
+    expect(deriveNationResources(['a'], (k) => prof[k], (k) => geo[k])).toEqual(prof.a);
+  });
+
+  it('treats zero/negative area or population as a fallback weight of 1', () => {
+    // a: area 0 → weight 1×1000=1000; b: full weight 1e6 → b dominates
+    const g: Record<string, { area: number; population: number }> = {
+      a: { area: 0, population: 1000 },
+      b: { area: 1000, population: 1000 },
+    };
+    expect(deriveNationResources(['a', 'b'], (k) => prof[k], (k) => g[k])).toEqual({
+      oil: 0.8, iron: 0.8, food: 0.8, industry: 0.8,
+    });
+  });
+
+  it('rounds each axis to 2 decimal places', () => {
+    // a=0.2 (w=1×1=1) + b=0.4 (w=2×1=2) → (0.2×1 + 0.4×2)/(1+2) = 1.0/3 = 0.3333… → 0.33
+    const g: Record<string, { area: number; population: number }> = {
+      a: { area: 1, population: 1 },
+      b: { area: 2, population: 1 },
+    };
+    const out = deriveNationResources(
+      ['a', 'b'],
+      (k) => k === 'a'
+        ? { oil: 0.2, iron: 0.2, food: 0.2, industry: 0.2 }
+        : { oil: 0.4, iron: 0.4, food: 0.4, industry: 0.4 },
+      (k) => g[k],
+    );
+    expect(out).toEqual({ oil: 0.33, iron: 0.33, food: 0.33, industry: 0.33 });
+  });
+});
+
 // --- seedRegionStats ---------------------------------------------------------
 
 describe('seedRegionStats', () => {