✨Feature: implement game shell UI with room navigation and combat mechanics

src/rules/runState.test.ts

@@ -6,9 +6,11 @@ import { createStartingAdventurer } from "./character";
 import {
   createRunState,
   enterCurrentRoom,
+  getAvailableMoves,
   resolveRunEnemyTurn,
   resolveRunPlayerTurn,
   startCombatInCurrentRoom,
+  travelCurrentExit,
 } from "./runState";
 
 function createSequenceRoller(values: number[]) {
@@ -183,4 +185,46 @@ describe("run state flow", () => {
       false,
     );
   });
+
+  it("lists available traversable exits for the current room", () => {
+    const run = createRunState({
+      content: sampleContentPack,
+      campaignId: "campaign.1",
+      adventurer: createAdventurer(),
+    });
+
+    expect(getAvailableMoves(run)).toEqual([
+      expect.objectContaining({
+        direction: "north",
+        generated: false,
+      }),
+    ]);
+  });
+
+  it("travels through an unresolved exit, generates a room, and enters it", () => {
+    const run = createRunState({
+      content: sampleContentPack,
+      campaignId: "campaign.1",
+      adventurer: createAdventurer(),
+      at: "2026-03-15T14:00:00.000Z",
+    });
+
+    const result = travelCurrentExit({
+      content: sampleContentPack,
+      run,
+      exitDirection: "north",
+      roller: createSequenceRoller([1, 1]),
+      at: "2026-03-15T14:05:00.000Z",
+    });
+
+    expect(result.run.currentRoomId).toBe("room.level1.room.002");
+    expect(result.run.dungeon.levels["1"]!.discoveredRoomOrder).toEqual([
+      "room.level1.start",
+      "room.level1.room.002",
+    ]);
+    expect(result.run.dungeon.levels["1"]!.rooms["room.level1.room.002"]!.discovery.entered).toBe(
+      true,
+    );
+    expect(result.run.log[0]?.text).toContain("Travelled north");
+  });
 });