feat: another balance and bug fix pass (#238)

Working through open issues — fixes, balance changes, and features.

## Closed

- Closes #161
- Closes #181
- Closes #191
- Closes #199
- Closes #201
- Closes #202
- Closes #203
- Closes #204
- Closes #205
- Closes #206
- Closes #208
- Closes #211
- Closes #212
- Closes #213
- Closes #214
- Closes #216
- Closes #219
- Closes #220
- Closes #221
- Closes #222
- Closes #224
- Closes #225
- Closes #226
- Closes #228
- Closes #229
- Closes #230
- Closes #231
- Closes #232
- Closes #233
- Closes #234
- Closes #235
- Closes #236

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #238
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

apps/api/test/routes/explore.spec.ts

@@ -246,6 +246,22 @@ describe("explore route", () => {
       expect(body.endsAt).toBeGreaterThan(Date.now());
     });
 
+    it("persists endsAt to the DB state on exploration start", async () => {
+      const state = makeState();
+      vi.mocked(prisma.gameState.findUnique).mockResolvedValueOnce({ state } as never);
+      vi.mocked(prisma.gameState.update).mockResolvedValueOnce({} as never);
+      const res = await postStart({ areaId: TEST_AREA_ID });
+      expect(res.status).toBe(200);
+      const body = await res.json() as { areaId: string; endsAt: number };
+      const updateCall = vi.mocked(prisma.gameState.update).mock.calls[0]?.[0];
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Test accesses nested mock data */
+      const savedState = (updateCall?.data as { state?: { exploration?: { areas?: Array<{ id: string; endsAt?: number }> } } }).state;
+      const savedArea = savedState?.exploration?.areas?.find((a) => {
+        return a.id === TEST_AREA_ID;
+      });
+      expect(savedArea?.endsAt).toBe(body.endsAt);
+    });
+
     it("backfills exploration state for old saves without exploration", async () => {
       const state = makeState({ exploration: undefined });
       vi.mocked(prisma.gameState.findUnique).mockResolvedValueOnce({ state } as never);