feat: #66 contested regions / frontlines — 12th ability (v0.44.0)

A third region state (contested frontline): a region in no nation's territory and not in unowned, opened/resolved by the LLM, tied to an active war. Sole-ownership invariant preserved. Durable GameState.contested; contested-inert stub; map legend stays at 7.

server/db.test.ts

@@ -40,6 +40,8 @@ function makeState(id: string): GameState {
     industry: [],
     // (v0.43.0, #65) no sea-zone control on a fresh state.
     seaZones: [],
+    // (v0.44.0, #66) no contested regions on a fresh state.
+    contested: [],
   };
 }
 
@@ -257,6 +259,17 @@ describe('openDb', () => {
     db.close();
   });
 
+  it('(v0.44.0 #66) a legacy row saved before the contested field existed loads with it defaulted to []', () => {
+    const db = openDb(':memory:');
+    const legacy = makeState('legacy');
+    delete (legacy as { contested?: unknown[] }).contested; // a pre-v0.44 save (field absent)
+    db.save(legacy);
+    const loaded = db.load('legacy');
+    expect(loaded).not.toBeNull();
+    expect(loaded!.contested).toEqual([]);
+    db.close();
+  });
+
   it('delete removes a game by id and reports absence otherwise', () => {
     const db = openDb(':memory:');
     db.save(makeState('a'));