fix: resolve pre-existing TypeScript strictness build errors

- Add @types/node to API devDependencies
- Create HonoEnv type and apply to all routers + auth middleware for
  proper context.get/set("discordId") typing
- Use conditional spreads for exactOptionalPropertyTypes dailyChallenges
  in GameContext, tick engine, and prestige route
- Use conditional spread for optional signature in SaveRequest calls
- Add non-null assertions in shuffle/template index for noUncheckedIndexedAccess
- Cast GameState to never for Prisma InputJsonValue fields
- Exclude vite.config.ts from web tsconfig (it runs in Node context)

apps/api/package.json

@@ -22,6 +22,7 @@
   "devDependencies": {
     "@nhcarrigan/eslint-config": "5.2.0",
     "@nhcarrigan/typescript-config": "4.0.0",
+    "@types/node": "25.3.5",
     "@vitest/coverage-v8": "3.0.8",
     "eslint": "9.22.0",
     "tsx": "4.19.3",

apps/api/src/middleware/auth.ts

@@ -1,7 +1,8 @@
-import type { Context, Next } from "hono";
+import type { MiddlewareHandler } from "hono";
+import type { HonoEnv } from "../types/hono.js";
 import { verifyToken } from "../services/jwt.js";
 
-export const authMiddleware = async (context: Context, next: Next): Promise<void> => {
+export const authMiddleware: MiddlewareHandler<HonoEnv> = async (context, next) => {
   const authorization = context.req.header("Authorization");
 
   if (!authorization?.startsWith("Bearer ")) {

apps/api/src/routes/auth.ts

@@ -68,7 +68,7 @@ authRouter.get("/callback", async (context) => {
       await prisma.gameState.create({
         data: {
           discordId: player.discordId,
-          state: initialState,
+          state: initialState as unknown as never,
           updatedAt: now,
         },
       });

apps/api/src/routes/prestige.ts

@@ -1,5 +1,6 @@
 import type { BuyPrestigeUpgradeRequest, GameState, PrestigeRequest } from "@elysium/types";
 import { Hono } from "hono";
+import type { HonoEnv } from "../types/hono.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
 import { DEFAULT_PRESTIGE_UPGRADES } from "../data/prestigeUpgrades.js";
@@ -10,7 +11,7 @@ import {
   isEligibleForPrestige,
 } from "../services/prestige.js";
 
-export const prestigeRouter = new Hono();
+export const prestigeRouter = new Hono<HonoEnv>();
 
 prestigeRouter.use("*", authMiddleware);
 
@@ -55,7 +56,7 @@ prestigeRouter.post("/", async (context) => {
   // Preserve daily challenges across the prestige reset and apply any crystal rewards
   const finalState: GameState = {
     ...newState,
-    dailyChallenges: updatedDailyChallenges,
+    ...(updatedDailyChallenges !== undefined ? { dailyChallenges: updatedDailyChallenges } : {}),
     resources: {
       ...newState.resources,
       crystals: newState.resources.crystals + challengeCrystals,

apps/api/src/routes/profile.ts

@@ -5,10 +5,11 @@ import type {
 } from "@elysium/types";
 import { DEFAULT_PROFILE_SETTINGS } from "@elysium/types";
 import { Hono } from "hono";
+import type { HonoEnv } from "../types/hono.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
 
-export const profileRouter = new Hono();
+export const profileRouter = new Hono<HonoEnv>();
 
 const VALID_NUMBER_FORMATS = new Set(["suffix", "scientific", "engineering"]);
 

apps/api/src/services/dailyChallenges.ts

@@ -25,7 +25,7 @@ const shuffleWithSeed = <T>(arr: T[], seed: number): T[] => {
   const result = [...arr];
   for (let i = result.length - 1; i > 0; i--) {
     const j = Math.floor(seededRandom(seed + i) * (i + 1));
-    [result[i], result[j]] = [result[j], result[i]];
+    [result[i], result[j]] = [result[j]!, result[i]!];
   }
   return result;
 };
@@ -48,7 +48,7 @@ export const generateDailyChallenges = (dateStr: string): DailyChallenge[] => {
   return selectedTypes.map((type, index) => {
     const templates = DAILY_CHALLENGE_TEMPLATES.filter((t) => t.type === type);
     const templateIndex = Math.floor(seededRandom(seed + index * 100) * templates.length);
-    const template = templates[templateIndex];
+    const template = templates[templateIndex]!;
 
     return {
       id: `${dateStr}_${type}`,

apps/api/src/types/hono.ts

@@ -0,0 +1 @@
+export type HonoEnv = { Variables: { discordId: string } };