feat: error handling, logging, analytics, OG tags, and sticky sidebar (#44)

## Summary

- Add comprehensive try/catch error handling across all API routes, middleware, and the Hono global error handler, piping every unhandled error to the `@nhcarrigan/logger` service to prevent silent crashes and unhandled Promise rejections
- Add a `logError` utility on the frontend that forwards errors through the overridden `console.error` to the backend telemetry endpoint; apply it to every silent `catch {}` block in the game context, sound, notification, and clipboard utilities, and wrap the React tree in an `ErrorBoundary`
- Add Plausible analytics, Open Graph + Twitter Card meta tags, Tree-Nation widget, and Google Ads to `index.html`
- Make the game sidebar sticky with a `--resource-bar-height` CSS custom property offset so it stays viewport-height without overlapping the resource bar; reset sticky behaviour in the mobile responsive override

## Test plan

- [ ] Lint passes: `pnpm lint`
- [ ] Build passes: `pnpm build`
- [ ] Verify errors thrown in API routes appear in the logger service rather than crashing the process
- [ ] Verify frontend errors appear in the `/api/fe/error` backend log
- [ ] Verify Open Graph tags render correctly when sharing the URL
- [ ] Verify Plausible analytics fires on page load
- [ ] Verify Tree-Nation badge renders in the sidebar
- [ ] Verify sidebar stays fixed while the main content scrolls on desktop
- [ ] Verify mobile layout is unaffected

✨ This issue was created with help from Hikari~ 🌸

Reviewed-on: #44
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

apps/api/package.json

@@ -15,6 +15,7 @@
   "dependencies": {
     "@elysium/types": "workspace:*",
     "@hono/node-server": "1.13.7",
+    "@nhcarrigan/logger": "1.1.1",
     "@prisma/client": "6.5.0",
     "hono": "4.7.4",
     "prisma": "6.5.0"

apps/api/prod.env

@@ -9,4 +9,5 @@ CORS_ORIGIN="op://Environment Variables - Naomi/Elysium/origin"
 DISCORD_MILESTONE_WEBHOOK="op://Environment Variables - Naomi/Elysium/discord milestone webhook"
 DISCORD_BOT_TOKEN="op://Environment Variables - Naomi/Elysium/discord bot token"
 DISCORD_GUILD_ID="op://Environment Variables - Naomi/Elysium/discord guild id"
-DISCORD_APOTHEOSIS_ROLE_ID="op://Environment Variables - Naomi/Elysium/discord apotheosis role id"
+DISCORD_APOTHEOSIS_ROLE_ID="op://Environment Variables - Naomi/Elysium/discord apotheosis role id"
+LOG_TOKEN="op://Environment Variables - Naomi/Alert Server/api_auth"

apps/api/src/index.ts

@@ -7,22 +7,24 @@
 import { serve } from "@hono/node-server";
 import { Hono } from "hono";
 import { cors } from "hono/cors";
-import { logger } from "hono/logger";
+import { logger as honoLogger } from "hono/logger";
 import { aboutRouter } from "./routes/about.js";
 import { apotheosisRouter } from "./routes/apotheosis.js";
 import { authRouter } from "./routes/auth.js";
 import { bossRouter } from "./routes/boss.js";
 import { craftRouter } from "./routes/craft.js";
 import { exploreRouter } from "./routes/explore.js";
+import { frontendRouter } from "./routes/frontend.js";
 import { gameRouter } from "./routes/game.js";
 import { leaderboardRouter } from "./routes/leaderboards.js";
 import { prestigeRouter } from "./routes/prestige.js";
 import { profileRouter } from "./routes/profile.js";
 import { transcendenceRouter } from "./routes/transcendence.js";
+import { logger } from "./services/logger.js";
 
 const app = new Hono();
 
-app.use("*", logger());
+app.use("*", honoLogger());
 app.use(
   "*",
   cors({
@@ -33,6 +35,7 @@ app.use(
 );
 
 app.route("/about", aboutRouter);
+app.route("/fe", frontendRouter);
 app.route("/auth", authRouter);
 app.route("/game", gameRouter);
 app.route("/boss", bossRouter);
@@ -48,8 +51,27 @@ app.get("/health", (context) => {
   return context.json({ status: "ok" });
 });
 
+app.onError((error, context) => {
+  void logger.error(
+    "hono_unhandled_error",
+    error instanceof Error
+      ? error
+      : new Error(String(error)),
+  );
+  return context.json({ error: "Internal server error" }, 500);
+});
+
 const port = Number(process.env.PORT ?? 3001);
 
-serve({ fetch: app.fetch, port: port }, () => {
-  process.stdout.write(`Elysium API running on port ${String(port)}\n`);
-});
+try {
+  serve({ fetch: app.fetch, port: port }, () => {
+    process.stdout.write(`Elysium API running on port ${String(port)}\n`);
+  });
+} catch (error) {
+  void logger.error(
+    "server_startup",
+    error instanceof Error
+      ? error
+      : new Error(String(error)),
+  );
+}

apps/api/src/middleware/auth.ts

@@ -6,6 +6,7 @@
  */
 
 import { verifyToken } from "../services/jwt.js";
+import { logger } from "../services/logger.js";
 import type { HonoEnvironment } from "../types/hono.js";
 import type { MiddlewareHandler } from "hono";
 
@@ -33,7 +34,13 @@ export const authMiddleware: MiddlewareHandler<HonoEnvironment> = async(
   try {
     const payload = verifyToken(token);
     context.set("discordId", payload.discordId);
-  } catch {
+  } catch (error) {
+    void logger.error(
+      "auth_middleware",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
     return context.json({ error: "Invalid or expired token" }, 401);
   }
 

apps/api/src/routes/about.ts

@@ -7,6 +7,7 @@
 /* eslint-disable stylistic/max-len -- URL cannot be shortened */
 /* eslint-disable require-atomic-updates -- Simple cache; race condition is acceptable */
 import { Hono } from "hono";
+import { logger } from "../services/logger.js";
 import type { AboutResponse, GiteaRelease } from "@elysium/types";
 
 // eslint-disable-next-line capitalized-comments -- v8 ignore
@@ -46,12 +47,24 @@ const fetchReleases = async(): Promise<Array<GiteaRelease>> => {
 const aboutRouter = new Hono();
 
 aboutRouter.get("/", async(context) => {
-  const releases = await fetchReleases();
-  const body: AboutResponse = {
-    apiVersion,
-    releases,
-  };
-  return context.json(body);
+  try {
+    const releases = await fetchReleases();
+    const body: AboutResponse = {
+      apiVersion,
+      releases,
+    };
+    return context.json(body);
+  // eslint-disable-next-line capitalized-comments -- v8 ignore
+  /* v8 ignore next 9 -- @preserve */
+  } catch (error) {
+    void logger.error(
+      "about",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { aboutRouter };

apps/api/src/routes/apotheosis.ts

@@ -5,6 +5,8 @@
  * @author Naomi Carrigan
  */
 /* eslint-disable max-lines-per-function -- Route handler requires many steps */
+/* eslint-disable max-statements -- Route handler requires many statements */
+
 /* eslint-disable stylistic/max-len -- Description string cannot be shortened */
 import { Hono } from "hono";
 import { prisma } from "../db/client.js";
@@ -13,6 +15,7 @@ import {
   buildPostApotheosisState,
   isEligibleForApotheosis,
 } from "../services/apotheosis.js";
+import { logger } from "../services/logger.js";
 import {
   grantApotheosisRole,
   postMilestoneWebhook,
@@ -25,94 +28,106 @@ const apotheosisRouter = new Hono<HonoEnvironment>();
 apotheosisRouter.use("*", authMiddleware);
 
 apotheosisRouter.post("/", async(context) => {
-  const discordId = context.get("discordId");
+  try {
+    const discordId = context.get("discordId");
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
 
-  if (!isEligibleForApotheosis(state)) {
-    return context.json(
-      {
-        error:
-          "Not eligible for Apotheosis — purchase all Transcendence upgrades first",
-      },
-      400,
-    );
-  }
+    if (!isEligibleForApotheosis(state)) {
+      return context.json(
+        {
+          error:
+            "Not eligible for Apotheosis — purchase all Transcendence upgrades first",
+        },
+        400,
+      );
+    }
 
-  // Capture current-run stats before the nuclear reset
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 9 -- @preserve */
-  const runBossesDefeated = state.bosses.filter((b) => {
-    return b.status === "defeated";
-  }).length;
-  const runQuestsCompleted = state.quests.filter((q) => {
-    return q.status === "completed";
-  }).length;
-  const runAdventurersRecruited = state.adventurers.reduce((sum, a) => {
-    return sum + a.count;
-  }, 0);
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 3 -- @preserve */
-  const runAchievementsUnlocked = state.achievements.filter((a) => {
-    return a.unlockedAt !== null;
-  }).length;
-
-  const { updatedState, updatedApotheosisData } = buildPostApotheosisState(
-    state,
-    state.player.characterName,
-  );
-
-  const now = Date.now();
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: updatedState as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  await prisma.player.update({
-    data: {
-      characterName: state.player.characterName,
-
-      lastSavedAt: now,
-
-      lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
-
-      lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
-
-      lifetimeBossesDefeated: { increment: runBossesDefeated },
-
-      lifetimeClicks: { increment: state.player.totalClicks },
-
-      // Accumulate into lifetime totals
-      lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
-
-      lifetimeQuestsCompleted: { increment: runQuestsCompleted },
-
-      totalClicks:     0,
-      // Reset current-run counters
-      totalGoldEarned: 0,
-    },
-    where: { discordId },
-  });
-
-  void grantApotheosisRole(discordId);
-  void postMilestoneWebhook(discordId, "apotheosis", {
-    apotheosis:    updatedApotheosisData.count,
-    prestige:      updatedState.prestige.count,
+    // Capture current-run stats before the nuclear reset
     // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    transcendence: updatedState.transcendence?.count ?? 0,
-  });
+    /* v8 ignore next 9 -- @preserve */
+    const runBossesDefeated = state.bosses.filter((b) => {
+      return b.status === "defeated";
+    }).length;
+    const runQuestsCompleted = state.quests.filter((q) => {
+      return q.status === "completed";
+    }).length;
+    const runAdventurersRecruited = state.adventurers.reduce((sum, a) => {
+      return sum + a.count;
+    }, 0);
 
-  return context.json({ apotheosisCount: updatedApotheosisData.count });
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 3 -- @preserve */
+    const runAchievementsUnlocked = state.achievements.filter((a) => {
+      return a.unlockedAt !== null;
+    }).length;
+
+    const { updatedState, updatedApotheosisData } = buildPostApotheosisState(
+      state,
+      state.player.characterName,
+    );
+
+    const now = Date.now();
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: updatedState as object, updatedAt: now },
+      where: { discordId },
+    });
+
+    await prisma.player.update({
+      data: {
+        characterName: state.player.characterName,
+
+        lastSavedAt: now,
+
+        lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
+
+        lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
+
+        lifetimeBossesDefeated: { increment: runBossesDefeated },
+
+        lifetimeClicks: { increment: state.player.totalClicks },
+
+        // Accumulate into lifetime totals
+        lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
+
+        lifetimeQuestsCompleted: { increment: runQuestsCompleted },
+
+        totalClicks:     0,
+        // Reset current-run counters
+        totalGoldEarned: 0,
+      },
+      where: { discordId },
+    });
+
+    const apotheosisCount = updatedApotheosisData.count;
+    void logger.metric("apotheosis", 1, { apotheosisCount, discordId });
+    void grantApotheosisRole(discordId);
+    void postMilestoneWebhook(discordId, "apotheosis", {
+      apotheosis:    updatedApotheosisData.count,
+      prestige:      updatedState.prestige.count,
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      transcendence: updatedState.transcendence?.count ?? 0,
+    });
+
+    return context.json({ apotheosisCount: updatedApotheosisData.count });
+  } catch (error) {
+    void logger.error(
+      "apotheosis",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { apotheosisRouter };

apps/api/src/routes/auth.ts

@@ -15,6 +15,7 @@ import {
   fetchDiscordUser,
 } from "../services/discord.js";
 import { signToken } from "../services/jwt.js";
+import { logger } from "../services/logger.js";
 import type { Player } from "@elysium/types";
 
 const authRouter = new Hono();
@@ -92,6 +93,8 @@ authRouter.get("/callback", async(context) => {
       });
 
       const jwtToken = signToken(player.discordId);
+      void logger.log("info", `New player registered: ${player.discordId}`);
+      void logger.metric("user_registered", 1, { discordId: player.discordId });
 
       // eslint-disable-next-line capitalized-comments -- v8 ignore
       /* v8 ignore next -- @preserve */
@@ -111,6 +114,8 @@ authRouter.get("/callback", async(context) => {
     });
 
     const jwtToken = signToken(updated.discordId);
+    void logger.log("info", `Player logged in: ${updated.discordId}`);
+    void logger.metric("user_login", 1, { discordId: updated.discordId });
 
     // eslint-disable-next-line capitalized-comments -- v8 ignore
     /* v8 ignore next -- @preserve */
@@ -118,7 +123,13 @@ authRouter.get("/callback", async(context) => {
     return context.redirect(
       `${clientUrl}/auth/callback?token=${jwtToken}&isNew=false`,
     );
-  } catch {
+  } catch (error) {
+    void logger.error(
+      "auth_callback",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
     // eslint-disable-next-line capitalized-comments -- v8 ignore
     /* v8 ignore next -- @preserve */
     const clientUrl = process.env.CORS_ORIGIN ?? "http://localhost:5173";

apps/api/src/routes/boss.ts

@@ -20,6 +20,7 @@ import { defaultEquipmentSets } from "../data/equipmentSets.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
 import { updateChallengeProgress } from "../services/dailyChallenges.js";
+import { logger } from "../services/logger.js";
 import type { HonoEnvironment } from "../types/hono.js";
 
 const bossRouter = new Hono<HonoEnvironment>();
@@ -121,254 +122,267 @@ const calculatePartyStats = (
 };
 
 bossRouter.post("/challenge", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<{ bossId: string }>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<{ bossId: string }>();
 
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!body.bossId) {
-    return context.json({ error: "Invalid request body" }, 400);
-  }
-
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
-
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
-  const boss = state.bosses.find((b) => {
-    return b.id === body.bossId;
-  });
-
-  if (!boss) {
-    return context.json({ error: "Boss not found" }, 404);
-  }
-
-  if (boss.status !== "available" && boss.status !== "in_progress") {
-    return context.json({ error: "Boss is not currently available" }, 400);
-  }
-
-  if (boss.prestigeRequirement > state.prestige.count) {
-    return context.json({ error: "Prestige requirement not met" }, 403);
-  }
-
-  const { partyDPS, partyMaxHp } = calculatePartyStats(state);
-
-  if (
-    partyDPS === 0
-    || partyMaxHp === 0
-    || !Number.isFinite(partyDPS)
-    || !Number.isFinite(partyMaxHp)
-  ) {
-    return context.json(
-      { error: "Your party has no adventurers ready to fight" },
-      400,
-    );
-  }
-
-  const bossHpBefore = boss.currentHp;
-  const bossDPS = boss.damagePerSecond;
-
-  const timeToKillBoss = bossHpBefore / partyDPS;
-  const timeToKillParty = partyMaxHp / bossDPS;
-
-  const won = timeToKillBoss <= timeToKillParty;
-
-  // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
-  let partyHpRemaining: number;
-  // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
-  let bossHpAtBattleEnd: number;
-  // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
-  let bossUpdatedHp: number;
-  // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned based on win/loss
-  let rewards: BossChallengeResponse["rewards"];
-  // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned based on win/loss
-  let casualties: BossChallengeResponse["casualties"];
-
-  if (won) {
-    bossHpAtBattleEnd = 0;
-    bossUpdatedHp = 0;
-    const bossDamageDealt = bossDPS * timeToKillBoss;
-    partyHpRemaining = Math.max(0, partyMaxHp - bossDamageDealt);
-
-    boss.status = "defeated";
-    boss.currentHp = 0;
-
-    state.resources.gold = state.resources.gold + boss.goldReward;
-    state.resources.essence = state.resources.essence + boss.essenceReward;
-    state.resources.crystals = state.resources.crystals + boss.crystalReward;
-    state.player.totalGoldEarned = state.player.totalGoldEarned + boss.goldReward;
-
-    for (const upgradeId of boss.upgradeRewards) {
-      const upgrade = state.upgrades.find((u) => {
-        return u.id === upgradeId;
-      });
-      if (upgrade) {
-        upgrade.unlocked = true;
-      }
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!body.bossId) {
+      return context.json({ error: "Invalid request body" }, 400);
     }
 
-    // Grant equipment rewards — auto-equip if the slot is currently empty
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next 14 -- @preserve */
-    for (const equipmentId of boss.equipmentRewards) {
-      const equipment = state.equipment.find((item) => {
-        return item.id === equipmentId;
-      });
-      if (equipment) {
-        equipment.owned = true;
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
 
-        const slotAlreadyEquipped = state.equipment.some((item) => {
-          return item.type === equipment.type && item.equipped;
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
+
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
+    const boss = state.bosses.find((b) => {
+      return b.id === body.bossId;
+    });
+
+    if (!boss) {
+      return context.json({ error: "Boss not found" }, 404);
+    }
+
+    if (boss.status !== "available" && boss.status !== "in_progress") {
+      return context.json({ error: "Boss is not currently available" }, 400);
+    }
+
+    if (boss.prestigeRequirement > state.prestige.count) {
+      return context.json({ error: "Prestige requirement not met" }, 403);
+    }
+
+    const { partyDPS, partyMaxHp } = calculatePartyStats(state);
+
+    if (
+      partyDPS === 0
+      || partyMaxHp === 0
+      || !Number.isFinite(partyDPS)
+      || !Number.isFinite(partyMaxHp)
+    ) {
+      return context.json(
+        { error: "Your party has no adventurers ready to fight" },
+        400,
+      );
+    }
+
+    const bossHpBefore = boss.currentHp;
+    const bossDPS = boss.damagePerSecond;
+
+    const timeToKillBoss = bossHpBefore / partyDPS;
+    const timeToKillParty = partyMaxHp / bossDPS;
+
+    const won = timeToKillBoss <= timeToKillParty;
+
+    // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
+    let partyHpRemaining: number;
+    // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
+    let bossHpAtBattleEnd: number;
+    // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned in if/else branches
+    let bossUpdatedHp: number;
+    // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned based on win/loss
+    let rewards: BossChallengeResponse["rewards"];
+    // eslint-disable-next-line @typescript-eslint/init-declarations -- Conditionally assigned based on win/loss
+    let casualties: BossChallengeResponse["casualties"];
+
+    if (won) {
+      bossHpAtBattleEnd = 0;
+      bossUpdatedHp = 0;
+      const bossDamageDealt = bossDPS * timeToKillBoss;
+      partyHpRemaining = Math.max(0, partyMaxHp - bossDamageDealt);
+
+      boss.status = "defeated";
+      boss.currentHp = 0;
+
+      state.resources.gold = state.resources.gold + boss.goldReward;
+      state.resources.essence = state.resources.essence + boss.essenceReward;
+      state.resources.crystals = state.resources.crystals + boss.crystalReward;
+      state.player.totalGoldEarned = state.player.totalGoldEarned + boss.goldReward;
+
+      for (const upgradeId of boss.upgradeRewards) {
+        const upgrade = state.upgrades.find((u) => {
+          return u.id === upgradeId;
         });
-        if (!slotAlreadyEquipped) {
-          equipment.equipped = true;
+        if (upgrade) {
+          upgrade.unlocked = true;
+        }
+      }
+
+      // Grant equipment rewards — auto-equip if the slot is currently empty
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 14 -- @preserve */
+      for (const equipmentId of boss.equipmentRewards) {
+        const equipment = state.equipment.find((item) => {
+          return item.id === equipmentId;
+        });
+        if (equipment) {
+          equipment.owned = true;
+
+          const slotAlreadyEquipped = state.equipment.some((item) => {
+            return item.type === equipment.type && item.equipped;
+          });
+          if (!slotAlreadyEquipped) {
+            equipment.equipped = true;
+          }
+        }
+      }
+
+      // Unlock next boss in the same zone (zone-based sequential progression)
+      const zoneBosses = state.bosses.filter((b) => {
+        return b.zoneId === boss.zoneId;
+      });
+      const zoneIndex = zoneBosses.findIndex((b) => {
+        return b.id === body.bossId;
+      });
+      const [ nextZoneBoss ] = zoneBosses.slice(zoneIndex + 1);
+      if (
+        nextZoneBoss
+        && nextZoneBoss.prestigeRequirement <= state.prestige.count
+      ) {
+        const nextBossInState = state.bosses.find((b) => {
+          return b.id === nextZoneBoss.id;
+        });
+        if (nextBossInState) {
+          nextBossInState.status = "available";
+        }
+      }
+
+      /*
+       * Unlock any zone whose unlock conditions are now both satisfied
+       * (final boss defeated AND final quest completed)
+       */
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      for (const zone of state.zones) {
+        if (zone.status === "unlocked") {
+          continue;
+        }
+        if (zone.unlockBossId !== body.bossId) {
+          continue;
+        }
+
+        // Boss condition just became satisfied — check the quest condition too
+        const questSatisfied
+          = zone.unlockQuestId === null
+          || state.quests.some((q) => {
+            return q.id === zone.unlockQuestId && q.status === "completed";
+          });
+        if (!questSatisfied) {
+          continue;
+        }
+        zone.status = "unlocked";
+        const updatedZoneBosses = state.bosses.filter((b) => {
+          return b.zoneId === zone.id;
+        });
+        const [ firstUpdatedBoss ] = updatedZoneBosses;
+        if (
+          firstUpdatedBoss
+          && firstUpdatedBoss.prestigeRequirement <= state.prestige.count
+        ) {
+          firstUpdatedBoss.status = "available";
+        }
+      }
+
+      // Update daily boss challenge progress
+      if (state.dailyChallenges) {
+        const { crystalsAwarded, updatedChallenges } = updateChallengeProgress(
+          state.dailyChallenges,
+          "bossesDefeated",
+          1,
+        );
+        state.dailyChallenges = updatedChallenges;
+        state.resources.crystals = state.resources.crystals + crystalsAwarded;
+      }
+
+      // First-kill bounty — look up authoritative bounty from static data
+      const staticBoss = defaultBosses.find((b) => {
+        return b.id === body.bossId;
+      });
+
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      const bountyRunestones = staticBoss?.bountyRunestones ?? 0;
+      state.prestige.runestones = state.prestige.runestones + bountyRunestones;
+
+      rewards = {
+        bountyRunestones: bountyRunestones,
+        crystals:         boss.crystalReward,
+        equipmentIds:     boss.equipmentRewards,
+        essence:          boss.essenceReward,
+        gold:             boss.goldReward,
+        upgradeIds:       boss.upgradeRewards,
+      };
+    } else {
+      const partyDamageDealt = partyDPS * timeToKillParty;
+      bossHpAtBattleEnd = Math.max(0, bossHpBefore - partyDamageDealt);
+      bossUpdatedHp = boss.maxHp;
+      partyHpRemaining = 0;
+
+      boss.status = "available";
+      boss.currentHp = boss.maxHp;
+
+      // How close was the party to winning? (0 = hopeless, 1 = nearly won)
+      const victoryProgress = Math.min(1, timeToKillParty / timeToKillBoss);
+      // Casualty rate scales from ~0% (nearly won) to 60% (completely outmatched)
+      const casualtyFraction = (1 - victoryProgress) * 0.6;
+
+      casualties = [];
+      for (const adventurer of state.adventurers) {
+        if (adventurer.count === 0) {
+          continue;
+        }
+        const killed = Math.floor(adventurer.count * casualtyFraction);
+        if (killed > 0) {
+          adventurer.count = Math.max(1, adventurer.count - killed);
+          casualties.push({ adventurerId: adventurer.id, killed: killed });
         }
       }
     }
 
-    // Unlock next boss in the same zone (zone-based sequential progression)
-    const zoneBosses = state.bosses.filter((b) => {
-      return b.zoneId === boss.zoneId;
-    });
-    const zoneIndex = zoneBosses.findIndex((b) => {
-      return b.id === body.bossId;
-    });
-    const [ nextZoneBoss ] = zoneBosses.slice(zoneIndex + 1);
-    if (
-      nextZoneBoss
-      && nextZoneBoss.prestigeRequirement <= state.prestige.count
-    ) {
-      const nextBossInState = state.bosses.find((b) => {
-        return b.id === nextZoneBoss.id;
-      });
-      if (nextBossInState) {
-        nextBossInState.status = "available";
-      }
-    }
-
-    /*
-     * Unlock any zone whose unlock conditions are now both satisfied
-     * (final boss defeated AND final quest completed)
-     */
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    for (const zone of state.zones) {
-      if (zone.status === "unlocked") {
-        continue;
-      }
-      if (zone.unlockBossId !== body.bossId) {
-        continue;
-      }
-
-      // Boss condition just became satisfied — check the quest condition too
-      const questSatisfied
-        = zone.unlockQuestId === null
-        || state.quests.some((q) => {
-          return q.id === zone.unlockQuestId && q.status === "completed";
-        });
-      if (!questSatisfied) {
-        continue;
-      }
-      zone.status = "unlocked";
-      const updatedZoneBosses = state.bosses.filter((b) => {
-        return b.zoneId === zone.id;
-      });
-      const [ firstUpdatedBoss ] = updatedZoneBosses;
-      if (
-        firstUpdatedBoss
-        && firstUpdatedBoss.prestigeRequirement <= state.prestige.count
-      ) {
-        firstUpdatedBoss.status = "available";
-      }
-    }
-
-    // Update daily boss challenge progress
-    if (state.dailyChallenges) {
-      const { crystalsAwarded, updatedChallenges } = updateChallengeProgress(
-        state.dailyChallenges,
-        "bossesDefeated",
-        1,
-      );
-      state.dailyChallenges = updatedChallenges;
-      state.resources.crystals = state.resources.crystals + crystalsAwarded;
-    }
-
-    // First-kill bounty — look up authoritative bounty from static data
-    const staticBoss = defaultBosses.find((b) => {
-      return b.id === body.bossId;
+    const now = Date.now();
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: state as object, updatedAt: now },
+      where: { discordId },
     });
 
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    const bountyRunestones = staticBoss?.bountyRunestones ?? 0;
-    state.prestige.runestones = state.prestige.runestones + bountyRunestones;
+    const { bossId } = body;
+    void logger.metric("boss_challenge", 1, { bossId, discordId, won });
 
-    rewards = {
-      bountyRunestones: bountyRunestones,
-      crystals:         boss.crystalReward,
-      equipmentIds:     boss.equipmentRewards,
-      essence:          boss.essenceReward,
-      gold:             boss.goldReward,
-      upgradeIds:       boss.upgradeRewards,
+    const bossMaxHp = boss.maxHp;
+    const bossNewHp = bossUpdatedHp;
+    const response: BossChallengeResponse = {
+      bossDPS,
+      bossHpAtBattleEnd,
+      bossHpBefore,
+      bossMaxHp,
+      bossNewHp,
+      partyDPS,
+      partyHpRemaining,
+      partyMaxHp,
+      won,
     };
-  } else {
-    const partyDamageDealt = partyDPS * timeToKillParty;
-    bossHpAtBattleEnd = Math.max(0, bossHpBefore - partyDamageDealt);
-    bossUpdatedHp = boss.maxHp;
-    partyHpRemaining = 0;
-
-    boss.status = "available";
-    boss.currentHp = boss.maxHp;
-
-    // How close was the party to winning? (0 = hopeless, 1 = nearly won)
-    const victoryProgress = Math.min(1, timeToKillParty / timeToKillBoss);
-    // Casualty rate scales from ~0% (nearly won) to 60% (completely outmatched)
-    const casualtyFraction = (1 - victoryProgress) * 0.6;
-
-    casualties = [];
-    for (const adventurer of state.adventurers) {
-      if (adventurer.count === 0) {
-        continue;
-      }
-      const killed = Math.floor(adventurer.count * casualtyFraction);
-      if (killed > 0) {
-        adventurer.count = Math.max(1, adventurer.count - killed);
-        casualties.push({ adventurerId: adventurer.id, killed: killed });
-      }
+    if (rewards !== undefined) {
+      response.rewards = rewards;
+    }
+    if (casualties !== undefined) {
+      response.casualties = casualties;
     }
-  }
 
-  const now = Date.now();
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: state as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  const bossMaxHp = boss.maxHp;
-  const bossNewHp = bossUpdatedHp;
-  const response: BossChallengeResponse = {
-    bossDPS,
-    bossHpAtBattleEnd,
-    bossHpBefore,
-    bossMaxHp,
-    bossNewHp,
-    partyDPS,
-    partyHpRemaining,
-    partyMaxHp,
-    won,
-  };
-  if (rewards !== undefined) {
-    response.rewards = rewards;
+    return context.json(response);
+  } catch (error) {
+    void logger.error(
+      "boss_challenge",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
   }
-  if (casualties !== undefined) {
-    response.casualties = casualties;
-  }
-
-  return context.json(response);
 });
 
 export { bossRouter };

apps/api/src/routes/craft.ts

@@ -11,6 +11,7 @@ import { Hono } from "hono";
 import { defaultRecipes } from "../data/recipes.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
+import { logger } from "../services/logger.js";
 import type { HonoEnvironment } from "../types/hono.js";
 import type {
   CraftRecipeRequest,
@@ -63,94 +64,106 @@ const recomputeCraftedMultipliers = (
 };
 
 craftRouter.post("/", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<CraftRecipeRequest>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<CraftRecipeRequest>();
 
-  const { recipeId } = body;
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!recipeId) {
-    return context.json({ error: "recipeId is required" }, 400);
-  }
-
-  const recipe = defaultRecipes.find((r) => {
-    return r.id === recipeId;
-  });
-  if (!recipe) {
-    return context.json({ error: "Unknown recipe" }, 404);
-  }
-
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
-
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
-
-  if (!state.exploration) {
-    return context.json({ error: "No exploration state found" }, 400);
-  }
-
-  if (state.exploration.craftedRecipeIds.includes(recipeId)) {
-    return context.json({ error: "Recipe already crafted" }, 400);
-  }
-
-  // Verify the player has all required materials
-  for (const requirement of recipe.requiredMaterials) {
-    const material = state.exploration.materials.find((m) => {
-      return m.materialId === requirement.materialId;
-    });
-    const quantity = material?.quantity ?? 0;
-    if (quantity < requirement.quantity) {
-      return context.json(
-        {
-          error: `Not enough ${requirement.materialId} (need ${String(requirement.quantity)}, have ${String(quantity)})`,
-        },
-        400,
-      );
+    const { recipeId } = body;
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!recipeId) {
+      return context.json({ error: "recipeId is required" }, 400);
     }
-  }
 
-  // Deduct materials
-  for (const requirement of recipe.requiredMaterials) {
-    const material = state.exploration.materials.find((m) => {
-      return m.materialId === requirement.materialId;
+    const recipe = defaultRecipes.find((r) => {
+      return r.id === recipeId;
     });
-    if (material) {
-      material.quantity = material.quantity - requirement.quantity;
+    if (!recipe) {
+      return context.json({ error: "Unknown recipe" }, 404);
     }
+
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
+
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
+
+    if (!state.exploration) {
+      return context.json({ error: "No exploration state found" }, 400);
+    }
+
+    if (state.exploration.craftedRecipeIds.includes(recipeId)) {
+      return context.json({ error: "Recipe already crafted" }, 400);
+    }
+
+    // Verify the player has all required materials
+    for (const requirement of recipe.requiredMaterials) {
+      const material = state.exploration.materials.find((m) => {
+        return m.materialId === requirement.materialId;
+      });
+      const quantity = material?.quantity ?? 0;
+      if (quantity < requirement.quantity) {
+        return context.json(
+          {
+            error: `Not enough ${requirement.materialId} (need ${String(requirement.quantity)}, have ${String(quantity)})`,
+          },
+          400,
+        );
+      }
+    }
+
+    // Deduct materials
+    for (const requirement of recipe.requiredMaterials) {
+      const material = state.exploration.materials.find((m) => {
+        return m.materialId === requirement.materialId;
+      });
+      if (material) {
+        material.quantity = material.quantity - requirement.quantity;
+      }
+    }
+
+    // Add recipe and recompute all multipliers from scratch
+    state.exploration.craftedRecipeIds.push(recipeId);
+    const updatedMultipliers = recomputeCraftedMultipliers(
+      state.exploration.craftedRecipeIds,
+    );
+    state.exploration.craftedGoldMultiplier
+      = updatedMultipliers.craftedGoldMultiplier;
+    state.exploration.craftedEssenceMultiplier
+      = updatedMultipliers.craftedEssenceMultiplier;
+    state.exploration.craftedClickMultiplier
+      = updatedMultipliers.craftedClickMultiplier;
+    state.exploration.craftedCombatMultiplier
+      = updatedMultipliers.craftedCombatMultiplier;
+
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: state as object, updatedAt: Date.now() },
+      where: { discordId },
+    });
+
+    void logger.metric("recipe_crafted", 1, { discordId, recipeId });
+
+    const bonusType = recipe.bonus.type;
+    const bonusValue = recipe.bonus.value;
+    const response: CraftRecipeResponse = {
+      bonusType,
+      bonusValue,
+      recipeId,
+      ...updatedMultipliers,
+    };
+    return context.json(response);
+  } catch (error) {
+    void logger.error(
+      "craft",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
   }
-
-  // Add recipe and recompute all multipliers from scratch
-  state.exploration.craftedRecipeIds.push(recipeId);
-  const updatedMultipliers = recomputeCraftedMultipliers(
-    state.exploration.craftedRecipeIds,
-  );
-  state.exploration.craftedGoldMultiplier
-    = updatedMultipliers.craftedGoldMultiplier;
-  state.exploration.craftedEssenceMultiplier
-    = updatedMultipliers.craftedEssenceMultiplier;
-  state.exploration.craftedClickMultiplier
-    = updatedMultipliers.craftedClickMultiplier;
-  state.exploration.craftedCombatMultiplier
-    = updatedMultipliers.craftedCombatMultiplier;
-
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: state as object, updatedAt: Date.now() },
-    where: { discordId },
-  });
-
-  const bonusType = recipe.bonus.type;
-  const bonusValue = recipe.bonus.value;
-  const response: CraftRecipeResponse = {
-    bonusType,
-    bonusValue,
-    recipeId,
-    ...updatedMultipliers,
-  };
-  return context.json(response);
 });
 
 export { craftRouter };

apps/api/src/routes/explore.ts

@@ -12,6 +12,7 @@ import { defaultExplorations } from "../data/explorations.js";
 import { initialExploration } from "../data/initialState.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
+import { logger } from "../services/logger.js";
 import type { HonoEnvironment } from "../types/hono.js";
 import type {
   ExploreCollectEventResult,
@@ -49,280 +50,233 @@ const pickNothingMessage = (): string => {
 };
 
 exploreRouter.post("/start", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<ExploreStartRequest>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<ExploreStartRequest>();
 
-  const { areaId } = body;
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!areaId) {
-    return context.json({ error: "areaId is required" }, 400);
-  }
+    const { areaId } = body;
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!areaId) {
+      return context.json({ error: "areaId is required" }, 400);
+    }
 
-  const explorationArea = defaultExplorations.find((a) => {
-    return a.id === areaId;
-  });
-  if (!explorationArea) {
-    return context.json({ error: "Unknown exploration area" }, 404);
-  }
+    const explorationArea = defaultExplorations.find((a) => {
+      return a.id === areaId;
+    });
+    if (!explorationArea) {
+      return context.json({ error: "Unknown exploration area" }, 404);
+    }
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
 
-  // Backfill exploration state for old saves that predate this feature
-  if (!state.exploration) {
-    state.exploration = structuredClone(initialExploration);
-    // Unlock areas for zones already unlocked in this save
-    for (const area of state.exploration.areas) {
-      const areaData = defaultExplorations.find((areaItem) => {
-        return areaItem.id === area.id;
-      });
+    // Backfill exploration state for old saves that predate this feature
+    if (!state.exploration) {
+      state.exploration = structuredClone(initialExploration);
+      // Unlock areas for zones already unlocked in this save
+      for (const area of state.exploration.areas) {
+        const areaData = defaultExplorations.find((areaItem) => {
+          return areaItem.id === area.id;
+        });
 
-      // eslint-disable-next-line capitalized-comments -- v8 ignore
-      /* v8 ignore next 3 -- @preserve */
-      if (!areaData) {
-        continue;
-      }
-      const zone = state.zones.find((z) => {
-        return z.id === areaData.zoneId;
-      });
-      if (zone?.status === "unlocked") {
-        area.status = "available";
+        // eslint-disable-next-line capitalized-comments -- v8 ignore
+        /* v8 ignore next 3 -- @preserve */
+        if (!areaData) {
+          continue;
+        }
+        const zone = state.zones.find((z) => {
+          return z.id === areaData.zoneId;
+        });
+        if (zone?.status === "unlocked") {
+          area.status = "available";
+        }
       }
     }
-  }
 
-  const zone = state.zones.find((z) => {
-    return z.id === explorationArea.zoneId;
-  });
-  if (!zone || zone.status !== "unlocked") {
-    return context.json({ error: "Zone is not unlocked" }, 400);
-  }
+    const zone = state.zones.find((z) => {
+      return z.id === explorationArea.zoneId;
+    });
+    if (!zone || zone.status !== "unlocked") {
+      return context.json({ error: "Zone is not unlocked" }, 400);
+    }
 
-  const area = state.exploration.areas.find((a) => {
-    return a.id === areaId;
-  });
-  if (!area) {
-    return context.json({ error: "Exploration area not found in state" }, 404);
-  }
+    const area = state.exploration.areas.find((a) => {
+      return a.id === areaId;
+    });
+    if (!area) {
+      return context.json(
+        { error: "Exploration area not found in state" },
+        404,
+      );
+    }
 
-  const anyInProgress = state.exploration.areas.some((a) => {
-    return a.status === "in_progress";
-  });
-  if (anyInProgress) {
-    return context.json(
-      { error: "An exploration is already in progress" },
-      400,
-    );
-  }
+    const anyInProgress = state.exploration.areas.some((a) => {
+      return a.status === "in_progress";
+    });
+    if (anyInProgress) {
+      return context.json(
+        { error: "An exploration is already in progress" },
+        400,
+      );
+    }
 
-  if (area.status === "locked") {
-    return context.json({ error: "Exploration area is locked" }, 400);
-  }
+    if (area.status === "locked") {
+      return context.json({ error: "Exploration area is locked" }, 400);
+    }
 
-  const now = Date.now();
-  area.status = "in_progress";
-  area.startedAt = now;
+    const now = Date.now();
+    area.status = "in_progress";
+    area.startedAt = now;
 
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: state as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  // eslint-disable-next-line stylistic/no-mixed-operators -- duration * 1000 is clear
-  const endsAt = now + explorationArea.durationSeconds * 1000;
-  const response: ExploreStartResponse = {
-    areaId,
-    endsAt,
-  };
-  return context.json(response);
-});
-
-exploreRouter.post("/collect", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<ExploreCollectRequest>();
-
-  const { areaId } = body;
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!areaId) {
-    return context.json({ error: "areaId is required" }, 400);
-  }
-
-  const explorationArea = defaultExplorations.find((a) => {
-    return a.id === areaId;
-  });
-  if (!explorationArea) {
-    return context.json({ error: "Unknown exploration area" }, 404);
-  }
-
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
-
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
-
-  if (!state.exploration) {
-    return context.json({ error: "No exploration state found" }, 400);
-  }
-
-  const area = state.exploration.areas.find((a) => {
-    return a.id === areaId;
-  });
-  if (!area) {
-    return context.json({ error: "Exploration area not found" }, 404);
-  }
-
-  if (area.status !== "in_progress") {
-    return context.json({ error: "Exploration is not in progress" }, 400);
-  }
-
-  const now = Date.now();
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next -- @preserve */
-  const startedAt = area.startedAt ?? 0;
-  const durationMs = explorationArea.durationSeconds * 1000;
-  const expiresAt = startedAt + durationMs;
-
-  if (now < expiresAt) {
-    return context.json({ error: "Exploration is not yet complete" }, 400);
-  }
-
-  area.status = "available";
-  area.completedOnce = true;
-
-  // 20% chance of finding nothing
-  if (Math.random() < nothingProbability) {
     await prisma.gameState.update({
       /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
       data:  { state: state as object, updatedAt: now },
       where: { discordId },
     });
 
-    const response: ExploreCollectResponse = {
-      event:          null,
-      foundNothing:   true,
-      materialsFound: [],
-      nothingMessage: pickNothingMessage(),
+    // eslint-disable-next-line stylistic/no-mixed-operators -- duration * 1000 is clear
+    const endsAt = now + explorationArea.durationSeconds * 1000;
+    const response: ExploreStartResponse = {
+      areaId,
+      endsAt,
     };
     return context.json(response);
+  } catch (error) {
+    void logger.error(
+      "explore_start",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
   }
+});
 
-  // Pick a random event
-  const eventIndex = Math.floor(Math.random() * explorationArea.events.length);
-  const event = explorationArea.events[eventIndex];
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 3 -- @preserve */
-  if (!event) {
-    return context.json({ error: "No events available" }, 500);
-  }
+exploreRouter.post("/collect", async(context) => {
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<ExploreCollectRequest>();
 
-  // Apply event effects and build the result summary
-  let goldChange = 0;
-  let essenceChange = 0;
-  let materialGained: { materialId: string; quantity: number } | null = null;
+    const { areaId } = body;
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!areaId) {
+      return context.json({ error: "areaId is required" }, 400);
+    }
 
-  if (event.effect.type === "gold_gain") {
-    // Gold gain — amount may be undefined in edge cases
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    const amount = event.effect.amount ?? 0;
-    state.resources.gold = state.resources.gold + amount;
-    state.player.totalGoldEarned = state.player.totalGoldEarned + amount;
-    goldChange = amount;
-  } else if (event.effect.type === "gold_loss") {
-    // Gold loss — amount may be undefined in edge cases
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    const amount = Math.min(state.resources.gold, event.effect.amount ?? 0);
-    state.resources.gold = state.resources.gold - amount;
-    goldChange = -amount;
-  } else if (event.effect.type === "essence_gain") {
-    // Essence gain — amount may be undefined in edge cases
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    const amount = event.effect.amount ?? 0;
-    state.resources.essence = state.resources.essence + amount;
-    essenceChange = amount;
-  } else if (event.effect.type === "material_gain") {
-    const { materialId } = event.effect;
+    const explorationArea = defaultExplorations.find((a) => {
+      return a.id === areaId;
+    });
+    if (!explorationArea) {
+      return context.json({ error: "Unknown exploration area" }, 404);
+    }
+
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
+
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
+
+    if (!state.exploration) {
+      return context.json({ error: "No exploration state found" }, 400);
+    }
+
+    const area = state.exploration.areas.find((a) => {
+      return a.id === areaId;
+    });
+    if (!area) {
+      return context.json({ error: "Exploration area not found" }, 404);
+    }
+
+    if (area.status !== "in_progress") {
+      return context.json({ error: "Exploration is not in progress" }, 400);
+    }
+
+    const now = Date.now();
 
     // eslint-disable-next-line capitalized-comments -- v8 ignore
     /* v8 ignore next -- @preserve */
-    const quantity = event.effect.quantity ?? 1;
-    if (materialId !== undefined && materialId !== "") {
-      const existing = state.exploration.materials.find((m) => {
-        return m.materialId === materialId;
+    const startedAt = area.startedAt ?? 0;
+    const durationMs = explorationArea.durationSeconds * 1000;
+    const expiresAt = startedAt + durationMs;
+
+    if (now < expiresAt) {
+      return context.json({ error: "Exploration is not yet complete" }, 400);
+    }
+
+    area.status = "available";
+    area.completedOnce = true;
+
+    // 20% chance of finding nothing
+    if (Math.random() < nothingProbability) {
+      await prisma.gameState.update({
+        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+        data:  { state: state as object, updatedAt: now },
+        where: { discordId },
       });
-      if (existing) {
-        existing.quantity = existing.quantity + quantity;
-      } else {
-        state.exploration.materials.push({ materialId, quantity });
-      }
-      materialGained = { materialId, quantity };
-      // eslint-disable-next-line capitalized-comments -- v8 ignore
-      /* v8 ignore next 13 -- @preserve */
+
+      const response: ExploreCollectResponse = {
+        event:          null,
+        foundNothing:   true,
+        materialsFound: [],
+        nothingMessage: pickNothingMessage(),
+      };
+      return context.json(response);
     }
-  } else if (event.effect.type === "adventurer_loss") { // eslint-disable-line @typescript-eslint/no-unnecessary-condition -- exhausted all other union members above
-    // Adventurer loss — fraction and loop are defensive
+
+    // Pick a random event
+    const eventIndex = Math.floor(
+      Math.random() * explorationArea.events.length,
+    );
+    const event = explorationArea.events[eventIndex];
     // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next 8 -- @preserve */
-    const fraction = event.effect.fraction ?? 0.05;
-    for (const adventurer of state.adventurers) {
-      const lost = Math.floor(adventurer.count * fraction);
-      if (lost > 0) {
-        adventurer.count = Math.max(0, adventurer.count - lost);
-      }
+    /* v8 ignore next 3 -- @preserve */
+    if (!event) {
+      return context.json({ error: "No events available" }, 500);
     }
-  }
 
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 8 -- @preserve */
-  let adventurerLostCount = 0;
-  if (event.effect.type === "adventurer_loss") {
-    const fraction = event.effect.fraction ?? 0.05;
-    for (const adv of state.adventurers) {
-      const lost = Math.floor(adv.count * fraction);
-      adventurerLostCount = adventurerLostCount + lost;
-    }
-  }
+    // Apply event effects and build the result summary
+    let goldChange = 0;
+    let essenceChange = 0;
+    let materialGained: { materialId: string; quantity: number } | null = null;
 
-  const eventResult: ExploreCollectEventResult = {
-    adventurerLostCount: adventurerLostCount,
-    essenceChange:       essenceChange,
-    goldChange:          goldChange,
-    materialGained:      materialGained,
-    text:                event.text,
-  };
-
-  // Roll for material drops from possibleMaterials (weighted random selection)
-  const materialsFound: Array<{ materialId: string; quantity: number }> = [];
-
-  if (explorationArea.possibleMaterials.length > 0) {
-    let totalWeight = 0;
-    for (const materialDrop of explorationArea.possibleMaterials) {
-      totalWeight = totalWeight + materialDrop.weight;
-    }
-    let roll = Math.random() * totalWeight;
-
-    for (const possible of explorationArea.possibleMaterials) {
-      roll = roll - possible.weight;
-      if (roll <= 0) {
-        const maxMinDiff = possible.maxQuantity - possible.minQuantity;
-        const range = maxMinDiff + 1;
-        const randomOffset = Math.floor(Math.random() * range);
-        const quantity = randomOffset + possible.minQuantity;
-        const { materialId } = possible;
+    if (event.effect.type === "gold_gain") {
+      // Gold gain — amount may be undefined in edge cases
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      const amount = event.effect.amount ?? 0;
+      state.resources.gold = state.resources.gold + amount;
+      state.player.totalGoldEarned = state.player.totalGoldEarned + amount;
+      goldChange = amount;
+    } else if (event.effect.type === "gold_loss") {
+      // Gold loss — amount may be undefined in edge cases
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      const amount = Math.min(state.resources.gold, event.effect.amount ?? 0);
+      state.resources.gold = state.resources.gold - amount;
+      goldChange = -amount;
+    } else if (event.effect.type === "essence_gain") {
+      // Essence gain — amount may be undefined in edge cases
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      const amount = event.effect.amount ?? 0;
+      state.resources.essence = state.resources.essence + amount;
+      essenceChange = amount;
+    } else if (event.effect.type === "material_gain") {
+      const { materialId } = event.effect;
 
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      const quantity = event.effect.quantity ?? 1;
+      if (materialId !== undefined && materialId !== "") {
         const existing = state.exploration.materials.find((m) => {
           return m.materialId === materialId;
         });
@@ -331,25 +285,97 @@ exploreRouter.post("/collect", async(context) => {
         } else {
           state.exploration.materials.push({ materialId, quantity });
         }
-
-        materialsFound.push({ materialId, quantity });
-        break;
+        materialGained = { materialId, quantity };
+        // eslint-disable-next-line capitalized-comments -- v8 ignore
+        /* v8 ignore next 13 -- @preserve */
+      }
+    } else if (event.effect.type === "adventurer_loss") { // eslint-disable-line @typescript-eslint/no-unnecessary-condition -- exhausted all other union members above
+      // Adventurer loss — fraction and loop are defensive
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 8 -- @preserve */
+      const fraction = event.effect.fraction ?? 0.05;
+      for (const adventurer of state.adventurers) {
+        const lost = Math.floor(adventurer.count * fraction);
+        if (lost > 0) {
+          adventurer.count = Math.max(0, adventurer.count - lost);
+        }
       }
     }
+
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 8 -- @preserve */
+    let adventurerLostCount = 0;
+    if (event.effect.type === "adventurer_loss") {
+      const fraction = event.effect.fraction ?? 0.05;
+      for (const adv of state.adventurers) {
+        const lost = Math.floor(adv.count * fraction);
+        adventurerLostCount = adventurerLostCount + lost;
+      }
+    }
+
+    const eventResult: ExploreCollectEventResult = {
+      adventurerLostCount: adventurerLostCount,
+      essenceChange:       essenceChange,
+      goldChange:          goldChange,
+      materialGained:      materialGained,
+      text:                event.text,
+    };
+
+    // Roll for material drops from possibleMaterials (weighted random selection)
+    const materialsFound: Array<{ materialId: string; quantity: number }> = [];
+
+    if (explorationArea.possibleMaterials.length > 0) {
+      let totalWeight = 0;
+      for (const materialDrop of explorationArea.possibleMaterials) {
+        totalWeight = totalWeight + materialDrop.weight;
+      }
+      let roll = Math.random() * totalWeight;
+
+      for (const possible of explorationArea.possibleMaterials) {
+        roll = roll - possible.weight;
+        if (roll <= 0) {
+          const maxMinDiff = possible.maxQuantity - possible.minQuantity;
+          const range = maxMinDiff + 1;
+          const randomOffset = Math.floor(Math.random() * range);
+          const quantity = randomOffset + possible.minQuantity;
+          const { materialId } = possible;
+
+          const existing = state.exploration.materials.find((m) => {
+            return m.materialId === materialId;
+          });
+          if (existing) {
+            existing.quantity = existing.quantity + quantity;
+          } else {
+            state.exploration.materials.push({ materialId, quantity });
+          }
+
+          materialsFound.push({ materialId, quantity });
+          break;
+        }
+      }
+    }
+
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: state as object, updatedAt: now },
+      where: { discordId },
+    });
+
+    const response: ExploreCollectResponse = {
+      event:          eventResult,
+      foundNothing:   false,
+      materialsFound: materialsFound,
+    };
+    return context.json(response);
+  } catch (error) {
+    void logger.error(
+      "explore_collect",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
   }
-
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: state as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  const response: ExploreCollectResponse = {
-    event:          eventResult,
-    foundNothing:   false,
-    materialsFound: materialsFound,
-  };
-  return context.json(response);
 });
 
 export { exploreRouter };

apps/api/src/routes/frontend.ts

@@ -0,0 +1,55 @@
+/**
+ * @file Frontend logging routes that pipe client-side logs to the telemetry service.
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { Hono } from "hono";
+import { logger } from "../services/logger.js";
+
+const validLevels = new Set([ "debug", "info", "warn" ]);
+
+const frontendRouter = new Hono();
+
+frontendRouter.post("/log", async(context) => {
+  try {
+    const body = await context.req.json<{ level: string; message: string }>();
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!body.level || !body.message || !validLevels.has(body.level)) {
+      return context.json({ error: "level and message are required" }, 400);
+    }
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- validated above */
+    void logger.log(body.level as "debug" | "info" | "warn", `[FE] ${body.message}`);
+    return context.json({ ok: true });
+  } catch (error) {
+    void logger.error(
+      "frontend_log",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
+});
+
+frontendRouter.post("/error", async(context) => {
+  try {
+    const body = await context.req.json<{ context: string; message: string }>();
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!body.context || !body.message) {
+      return context.json({ error: "context and message are required" }, 400);
+    }
+    void logger.error(`[FE] ${body.context}`, new Error(body.message));
+    return context.json({ ok: true });
+  } catch (error) {
+    void logger.error(
+      "frontend_error",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
+});
+
+export { frontendRouter };

apps/api/src/routes/game.ts

@@ -27,6 +27,7 @@ import { currentSchemaVersion } from "../data/schemaVersion.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
 import { getOrResetDailyChallenges } from "../services/dailyChallenges.js";
+import { logger } from "../services/logger.js";
 import { calculateOfflineEarnings } from "../services/offlineProgress.js";
 import {
   checkAndUnlockTitles,
@@ -681,18 +682,387 @@ const gameRouter = new Hono<HonoEnvironment>();
 gameRouter.use("*", authMiddleware);
 
 gameRouter.get("/load", async(context) => {
-  const discordId = context.get("discordId");
+  try {
+    const discordId = context.get("discordId");
 
-  const [ record, playerRecord ] = await Promise.all([
-    prisma.gameState.findUnique({ where: { discordId } }),
-    prisma.player.findUnique({ where: { discordId } }),
-  ]);
+    const [ record, playerRecord ] = await Promise.all([
+      prisma.gameState.findUnique({ where: { discordId } }),
+      prisma.player.findUnique({ where: { discordId } }),
+    ]);
 
-  if (!record) {
-    // No save found — create a fresh state (handles nuked DB or first-time load race)
+    if (!record) {
+      // No save found — create a fresh state (handles nuked DB or first-time load race)
+      if (!playerRecord) {
+        return context.json({ error: "No player found" }, 404);
+      }
+      const freshState = initialGameState(
+        {
+          avatar:                       playerRecord.avatar,
+          characterName:                playerRecord.characterName,
+          createdAt:                    playerRecord.createdAt,
+          discordId:                    playerRecord.discordId,
+          discriminator:                playerRecord.discriminator,
+          lastSavedAt:                  Date.now(),
+          // eslint-disable-next-line stylistic/max-len -- Long property names exceed limit after try-block indent
+          lifetimeAchievementsUnlocked: playerRecord.lifetimeAchievementsUnlocked,
+          // eslint-disable-next-line stylistic/max-len -- Long property names exceed limit after try-block indent
+          lifetimeAdventurersRecruited: playerRecord.lifetimeAdventurersRecruited,
+          lifetimeBossesDefeated:       playerRecord.lifetimeBossesDefeated,
+          lifetimeClicks:               playerRecord.lifetimeClicks,
+          lifetimeGoldEarned:           playerRecord.lifetimeGoldEarned,
+          lifetimeQuestsCompleted:      playerRecord.lifetimeQuestsCompleted,
+          totalClicks:                  0,
+          totalGoldEarned:              0,
+          username:                     playerRecord.username,
+        },
+        playerRecord.characterName,
+      );
+      const createdAt = Date.now();
+      await prisma.gameState.create({
+        data: {
+          discordId: discordId,
+          /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+          state:     freshState as object,
+          updatedAt: createdAt,
+        },
+      });
+      const secret = process.env.ANTI_CHEAT_SECRET;
+
+      // Sign the state for anti-cheat verification
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 3 -- @preserve */
+      const signature = secret === undefined
+        ? undefined
+        : computeHmac(JSON.stringify(freshState), secret);
+      return context.json({
+        currentSchemaVersion: currentSchemaVersion,
+        loginBonus:           null,
+        loginStreak:          playerRecord.loginStreak,
+        offlineEssence:       0,
+        offlineGold:          0,
+        offlineSeconds:       0,
+        schemaOutdated:       false,
+        signature:            signature,
+        state:                freshState,
+      });
+    }
+
+    const rawState: unknown = record.state;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+    const state = rawState as GameState;
+
+    /*
+     * Always sync character name from the Player record — the profile update route
+     * writes to Player.characterName directly, bypassing the game state blob.
+     */
+    if (playerRecord !== null) {
+      state.player.characterName = playerRecord.characterName;
+    }
+
+    const now = Date.now();
+
+    const { offlineGold, offlineEssence, offlineSeconds }
+      = calculateOfflineEarnings(state, now);
+
+    if (offlineGold > 0) {
+      state.resources.gold = state.resources.gold + offlineGold;
+      state.player.totalGoldEarned = state.player.totalGoldEarned + offlineGold;
+    }
+
+    if (offlineEssence > 0) {
+      state.resources.essence = state.resources.essence + offlineEssence;
+    }
+
+    // Generate or reset daily challenges if a new day has begun
+    state.dailyChallenges = getOrResetDailyChallenges(state);
+
+    // Daily login bonus — award once per calendar day (UTC)
+    const todayUTC = new Date().toISOString().
+      slice(0, 10);
+    const yesterdayUTC = new Date(now - 86_400_000).toISOString().
+      slice(0, 10);
+    let loginBonus: LoginBonusResult | null = null;
+
+    // Default loginStreak to 1 for brand-new accounts
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next -- @preserve */
+    let loginStreak = playerRecord?.loginStreak ?? 1;
+
+    if (playerRecord && playerRecord.lastLoginDate !== todayUTC) {
+      const previousStreak = playerRecord.loginStreak;
+      const updatedStreak
+        = playerRecord.lastLoginDate === yesterdayUTC
+          ? previousStreak + 1
+          : 1;
+      const dayIndex = (updatedStreak - 1) % 7;
+      const weekMultiplier = Math.floor((updatedStreak - 1) / 7) + 1;
+      const reward = dailyRewards[dayIndex];
+
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 2 -- @preserve */
+      const goldEarned = (reward?.goldBase ?? 500) * weekMultiplier;
+      const crystalsEarned = (reward?.crystals ?? 0) * weekMultiplier;
+
+      state.resources.gold = Math.min(
+        state.resources.gold + goldEarned,
+        resourceCap,
+      );
+      state.player.totalGoldEarned = state.player.totalGoldEarned + goldEarned;
+      state.resources.crystals = Math.min(
+        state.resources.crystals + crystalsEarned,
+        resourceCap,
+      );
+
+      loginStreak = updatedStreak;
+      loginBonus = {
+        crystalsEarned: crystalsEarned,
+        day:            dayIndex + 1,
+        goldEarned:     goldEarned,
+        streak:         updatedStreak,
+        weekMultiplier: weekMultiplier,
+      };
+
+      await prisma.player.
+        update({
+          data:  { lastLoginDate: todayUTC, loginStreak: updatedStreak },
+          where: { discordId },
+        }).
+        catch((error: unknown) => {
+          // Ignore write-conflict errors (P2034) — rethrow anything else
+          // eslint-disable-next-line capitalized-comments -- v8 ignore
+          /* v8 ignore next 5 -- @preserve */
+          /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma error shape */
+          const { code } = error as { code?: string };
+          if (code !== "P2034") {
+            throw error;
+          }
+        });
+    }
+
+    state.lastTickAt = now;
+
+    if (offlineGold > 0 || offlineEssence > 0 || loginBonus !== null) {
+      // Persist updated state immediately so offline/login rewards aren't double-counted.
+      /*
+       * Swallow write conflicts (P2034): offline earnings and login bonus are applied
+       * server-side and must be persisted immediately so they aren't double-counted.
+       */
+      await prisma.gameState.
+        update({
+          /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+          data:  { state: state as object, updatedAt: now },
+          where: { discordId },
+        }).
+        catch((error: unknown) => {
+          // Ignore write-conflict errors (P2034) — rethrow anything else
+          // eslint-disable-next-line capitalized-comments -- v8 ignore
+          /* v8 ignore next 5 -- @preserve */
+          /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma error shape */
+          const { code } = error as { code?: string };
+          if (code !== "P2034") {
+            throw error;
+          }
+        });
+    }
+
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next -- @preserve */
+    const schemaOutdated = (state.schemaVersion ?? 0) < currentSchemaVersion;
+
+    const secret = process.env.ANTI_CHEAT_SECRET;
+    const signature = secret === undefined
+      ? undefined
+      : computeHmac(JSON.stringify(state), secret);
+    return context.json({
+      currentSchemaVersion,
+      loginBonus,
+      loginStreak,
+      offlineEssence,
+      offlineGold,
+      offlineSeconds,
+      schemaOutdated,
+      signature,
+      state,
+    });
+  } catch (error) {
+    void logger.error(
+      "game_load",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
+});
+
+gameRouter.post("/save", async(context) => {
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<SaveRequest>();
+
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Defensive check for malformed requests
+    if (body.state === null || body.state === undefined) {
+      return context.json({ error: "Missing state in request body" }, 400);
+    }
+
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next -- @preserve */
+    if ((body.state.schemaVersion ?? 0) < currentSchemaVersion) {
+      return context.json(
+        {
+          // eslint-disable-next-line stylistic/max-len -- Error message cannot be shortened
+          error: "Save rejected: outdated save. Reset your progress to continue.",
+        },
+        409,
+      );
+    }
+
+    const secret = process.env.ANTI_CHEAT_SECRET;
+    const [ record, playerRecord ] = await Promise.all([
+      prisma.gameState.findUnique({ where: { discordId } }),
+      prisma.player.findUnique({ where: { discordId } }),
+    ]);
+
+    let stateToSave = body.state;
+
+    if (record) {
+      const rawPreviousState: unknown = record.state;
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
+      const previousState = rawPreviousState as GameState;
+
+      // Option D: verify HMAC signature if the secret is configured and client sent one
+      if (secret !== undefined && body.signature !== undefined) {
+        const expectedSig = computeHmac(JSON.stringify(previousState), secret);
+        if (body.signature !== expectedSig) {
+          return context.json(
+            { error: "Save rejected: signature mismatch" },
+            400,
+          );
+        }
+      }
+
+      // Option A: sanitise the incoming state against the previous to block rollbacks and cap cheats
+      stateToSave = validateAndSanitize(body.state, previousState);
+    }
+
+    const now = Date.now();
+
+    /*
+     * Stamp the authoritative save timestamp into the state blob so that on the
+     * next load the client reads the correct value from state.player.lastSavedAt.
+     */
+    stateToSave = {
+      ...stateToSave,
+      player: { ...stateToSave.player, lastSavedAt: now },
+    };
+
+    /*
+     * Preserve the Player record's character name so that profile updates are not
+     * overwritten by the next auto-save (profile PUT writes to Player, not the blob).
+     */
+    stateToSave = {
+      ...stateToSave,
+      player: {
+        ...stateToSave.player,
+        characterName:
+          playerRecord?.characterName ?? stateToSave.player.characterName,
+      },
+    };
+
+    /*
+     * Recompute companion unlocks server-side using DB-authoritative player lifetime stats.
+     * This prevents clients from claiming companions they haven't legitimately unlocked.
+     */
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 8 -- @preserve */
+    const companionUnlocks = computeUnlockedCompanionIds({
+      apotheosisCount:         stateToSave.apotheosis?.count ?? 0,
+      lifetimeBossesDefeated:  playerRecord?.lifetimeBossesDefeated ?? 0,
+      lifetimeGoldEarned:      playerRecord?.lifetimeGoldEarned ?? 0,
+      lifetimeQuestsCompleted: playerRecord?.lifetimeQuestsCompleted ?? 0,
+      prestigeCount:           stateToSave.prestige.count,
+      transcendenceCount:      stateToSave.transcendence?.count ?? 0,
+    });
+    const clientActiveCompanionId
+      = stateToSave.companions?.activeCompanionId ?? null;
+    const validatedActiveCompanionId
+      = clientActiveCompanionId !== null
+      && companionUnlocks.includes(clientActiveCompanionId)
+        ? clientActiveCompanionId
+        : null;
+    stateToSave = {
+      ...stateToSave,
+      companions: {
+        activeCompanionId:    validatedActiveCompanionId,
+        unlockedCompanionIds: companionUnlocks,
+      },
+    };
+
+    const currentUnlocked = parseUnlockedTitles(playerRecord?.unlockedTitles);
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 6 -- @preserve */
+    const updatedTitles = checkAndUnlockTitles({
+      createdAt:       playerRecord?.createdAt ?? Date.now(),
+      currentUnlocked: currentUnlocked,
+      guildName:       playerRecord?.guildName ?? "",
+      state:           stateToSave,
+    });
+    const updatedUnlocked
+      = updatedTitles.length > 0
+        ? [ ...currentUnlocked, ...updatedTitles ]
+        : undefined;
+
+    await prisma.player.update({
+      data: {
+        characterName:   stateToSave.player.characterName,
+        lastSavedAt:     now,
+        totalClicks:     stateToSave.player.totalClicks,
+        totalGoldEarned: stateToSave.player.totalGoldEarned,
+        ...updatedUnlocked
+          ? { unlockedTitles: updatedUnlocked }
+          : {},
+      },
+      where: { discordId },
+    });
+
+    await prisma.gameState.upsert({
+      create: {
+        discordId: discordId,
+        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires never */
+        state:     stateToSave as unknown as never,
+        updatedAt: now,
+      },
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires never */
+      update: { state: stateToSave as unknown as never, updatedAt: now },
+      where:  { discordId },
+    });
+
+    const signature = secret === undefined
+      ? undefined
+      : computeHmac(JSON.stringify(stateToSave), secret);
+    return context.json({ savedAt: now, signature: signature });
+  } catch (error) {
+    void logger.error(
+      "game_save",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
+});
+
+gameRouter.post("/reset", async(context) => {
+  try {
+    const discordId = context.get("discordId");
+
+    const playerRecord = await prisma.player.findUnique({
+      where: { discordId },
+    });
     if (!playerRecord) {
       return context.json({ error: "No player found" }, 404);
     }
+
     const freshState = initialGameState(
       {
         avatar:                       playerRecord.avatar,
@@ -713,23 +1083,25 @@ gameRouter.get("/load", async(context) => {
       },
       playerRecord.characterName,
     );
+
     const createdAt = Date.now();
-    await prisma.gameState.create({
-      data: {
+    await prisma.gameState.upsert({
+      create: {
         discordId: discordId,
         /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
         state:     freshState as object,
         updatedAt: createdAt,
       },
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      update: { state: freshState as object, updatedAt: createdAt },
+      where:  { discordId },
     });
-    const secret = process.env.ANTI_CHEAT_SECRET;
 
-    // Sign the state for anti-cheat verification
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next 3 -- @preserve */
+    const secret = process.env.ANTI_CHEAT_SECRET;
     const signature = secret === undefined
       ? undefined
       : computeHmac(JSON.stringify(freshState), secret);
+
     return context.json({
       currentSchemaVersion: currentSchemaVersion,
       loginBonus:           null,
@@ -741,351 +1113,15 @@ gameRouter.get("/load", async(context) => {
       signature:            signature,
       state:                freshState,
     });
-  }
-
-  const rawState: unknown = record.state;
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-  const state = rawState as GameState;
-
-  /*
-   * Always sync character name from the Player record — the profile update route
-   * writes to Player.characterName directly, bypassing the game state blob.
-   */
-  if (playerRecord !== null) {
-    state.player.characterName = playerRecord.characterName;
-  }
-
-  const now = Date.now();
-
-  const { offlineGold, offlineEssence, offlineSeconds }
-    = calculateOfflineEarnings(state, now);
-
-  if (offlineGold > 0) {
-    state.resources.gold = state.resources.gold + offlineGold;
-    state.player.totalGoldEarned = state.player.totalGoldEarned + offlineGold;
-  }
-
-  if (offlineEssence > 0) {
-    state.resources.essence = state.resources.essence + offlineEssence;
-  }
-
-  // Generate or reset daily challenges if a new day has begun
-  state.dailyChallenges = getOrResetDailyChallenges(state);
-
-  // Daily login bonus — award once per calendar day (UTC)
-  const todayUTC = new Date().toISOString().
-    slice(0, 10);
-  const yesterdayUTC = new Date(now - 86_400_000).toISOString().
-    slice(0, 10);
-  let loginBonus: LoginBonusResult | null = null;
-
-  // Default loginStreak to 1 for brand-new accounts
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next -- @preserve */
-  let loginStreak = playerRecord?.loginStreak ?? 1;
-
-  if (playerRecord && playerRecord.lastLoginDate !== todayUTC) {
-    const previousStreak = playerRecord.loginStreak;
-    const updatedStreak
-      = playerRecord.lastLoginDate === yesterdayUTC
-        ? previousStreak + 1
-        : 1;
-    const dayIndex = (updatedStreak - 1) % 7;
-    const weekMultiplier = Math.floor((updatedStreak - 1) / 7) + 1;
-    const reward = dailyRewards[dayIndex];
-
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next 2 -- @preserve */
-    const goldEarned = (reward?.goldBase ?? 500) * weekMultiplier;
-    const crystalsEarned = (reward?.crystals ?? 0) * weekMultiplier;
-
-    state.resources.gold = Math.min(
-      state.resources.gold + goldEarned,
-      resourceCap,
+  } catch (error) {
+    void logger.error(
+      "game_reset",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
     );
-    state.player.totalGoldEarned = state.player.totalGoldEarned + goldEarned;
-    state.resources.crystals = Math.min(
-      state.resources.crystals + crystalsEarned,
-      resourceCap,
-    );
-
-    loginStreak = updatedStreak;
-    loginBonus = {
-      crystalsEarned: crystalsEarned,
-      day:            dayIndex + 1,
-      goldEarned:     goldEarned,
-      streak:         updatedStreak,
-      weekMultiplier: weekMultiplier,
-    };
-
-    await prisma.player.
-      update({
-        data:  { lastLoginDate: todayUTC, loginStreak: updatedStreak },
-        where: { discordId },
-      }).
-      catch((error: unknown) => {
-        // Ignore write-conflict errors (P2034) — rethrow anything else
-        // eslint-disable-next-line capitalized-comments -- v8 ignore
-        /* v8 ignore next 5 -- @preserve */
-        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma error shape */
-        const { code } = error as { code?: string };
-        if (code !== "P2034") {
-          throw error;
-        }
-      });
+    return context.json({ error: "Internal server error" }, 500);
   }
-
-  state.lastTickAt = now;
-
-  if (offlineGold > 0 || offlineEssence > 0 || loginBonus !== null) {
-    // Persist updated state immediately so offline/login rewards aren't double-counted.
-    /*
-     * Swallow write conflicts (P2034): offline earnings and login bonus are applied
-     * server-side and must be persisted immediately so they aren't double-counted.
-     */
-    await prisma.gameState.
-      update({
-        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-        data:  { state: state as object, updatedAt: now },
-        where: { discordId },
-      }).
-      catch((error: unknown) => {
-        // Ignore write-conflict errors (P2034) — rethrow anything else
-        // eslint-disable-next-line capitalized-comments -- v8 ignore
-        /* v8 ignore next 5 -- @preserve */
-        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma error shape */
-        const { code } = error as { code?: string };
-        if (code !== "P2034") {
-          throw error;
-        }
-      });
-  }
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next -- @preserve */
-  const schemaOutdated = (state.schemaVersion ?? 0) < currentSchemaVersion;
-
-  const secret = process.env.ANTI_CHEAT_SECRET;
-  const signature = secret === undefined
-    ? undefined
-    : computeHmac(JSON.stringify(state), secret);
-  return context.json({
-    currentSchemaVersion,
-    loginBonus,
-    loginStreak,
-    offlineEssence,
-    offlineGold,
-    offlineSeconds,
-    schemaOutdated,
-    signature,
-    state,
-  });
-});
-
-gameRouter.post("/save", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<SaveRequest>();
-
-  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Defensive check for malformed requests
-  if (body.state === null || body.state === undefined) {
-    return context.json({ error: "Missing state in request body" }, 400);
-  }
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next -- @preserve */
-  if ((body.state.schemaVersion ?? 0) < currentSchemaVersion) {
-    return context.json(
-      {
-        error: "Save rejected: outdated save. Reset your progress to continue.",
-      },
-      409,
-    );
-  }
-
-  const secret = process.env.ANTI_CHEAT_SECRET;
-  const [ record, playerRecord ] = await Promise.all([
-    prisma.gameState.findUnique({ where: { discordId } }),
-    prisma.player.findUnique({ where: { discordId } }),
-  ]);
-
-  let stateToSave = body.state;
-
-  if (record) {
-    const rawPreviousState: unknown = record.state;
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue; cast to GameState */
-    const previousState = rawPreviousState as GameState;
-
-    // Option D: verify HMAC signature if the secret is configured and client sent one
-    if (secret !== undefined && body.signature !== undefined) {
-      const expectedSig = computeHmac(JSON.stringify(previousState), secret);
-      if (body.signature !== expectedSig) {
-        return context.json(
-          { error: "Save rejected: signature mismatch" },
-          400,
-        );
-      }
-    }
-
-    // Option A: sanitise the incoming state against the previous to block rollbacks and cap cheats
-    stateToSave = validateAndSanitize(body.state, previousState);
-  }
-
-  const now = Date.now();
-
-  /*
-   * Stamp the authoritative save timestamp into the state blob so that on the
-   * next load the client reads the correct value from state.player.lastSavedAt.
-   */
-  stateToSave = {
-    ...stateToSave,
-    player: { ...stateToSave.player, lastSavedAt: now },
-  };
-
-  /*
-   * Preserve the Player record's character name so that profile updates are not
-   * overwritten by the next auto-save (profile PUT writes to Player, not the blob).
-   */
-  stateToSave = {
-    ...stateToSave,
-    player: {
-      ...stateToSave.player,
-      characterName:
-        playerRecord?.characterName ?? stateToSave.player.characterName,
-    },
-  };
-
-  /*
-   * Recompute companion unlocks server-side using DB-authoritative player lifetime stats.
-   * This prevents clients from claiming companions they haven't legitimately unlocked.
-   */
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 8 -- @preserve */
-  const companionUnlocks = computeUnlockedCompanionIds({
-    apotheosisCount:         stateToSave.apotheosis?.count ?? 0,
-    lifetimeBossesDefeated:  playerRecord?.lifetimeBossesDefeated ?? 0,
-    lifetimeGoldEarned:      playerRecord?.lifetimeGoldEarned ?? 0,
-    lifetimeQuestsCompleted: playerRecord?.lifetimeQuestsCompleted ?? 0,
-    prestigeCount:           stateToSave.prestige.count,
-    transcendenceCount:      stateToSave.transcendence?.count ?? 0,
-  });
-  const clientActiveCompanionId
-    = stateToSave.companions?.activeCompanionId ?? null;
-  const validatedActiveCompanionId
-    = clientActiveCompanionId !== null
-    && companionUnlocks.includes(clientActiveCompanionId)
-      ? clientActiveCompanionId
-      : null;
-  stateToSave = {
-    ...stateToSave,
-    companions: {
-      activeCompanionId:    validatedActiveCompanionId,
-      unlockedCompanionIds: companionUnlocks,
-    },
-  };
-
-  const currentUnlocked = parseUnlockedTitles(playerRecord?.unlockedTitles);
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 6 -- @preserve */
-  const updatedTitles = checkAndUnlockTitles({
-    createdAt:       playerRecord?.createdAt ?? Date.now(),
-    currentUnlocked: currentUnlocked,
-    guildName:       playerRecord?.guildName ?? "",
-    state:           stateToSave,
-  });
-  const updatedUnlocked
-    = updatedTitles.length > 0
-      ? [ ...currentUnlocked, ...updatedTitles ]
-      : undefined;
-
-  await prisma.player.update({
-    data: {
-      characterName:   stateToSave.player.characterName,
-      lastSavedAt:     now,
-      totalClicks:     stateToSave.player.totalClicks,
-      totalGoldEarned: stateToSave.player.totalGoldEarned,
-      ...updatedUnlocked
-        ? { unlockedTitles: updatedUnlocked }
-        : {},
-    },
-    where: { discordId },
-  });
-
-  await prisma.gameState.upsert({
-    create: {
-      discordId: discordId,
-      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires never */
-      state:     stateToSave as unknown as never,
-      updatedAt: now,
-    },
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires never */
-    update: { state: stateToSave as unknown as never, updatedAt: now },
-    where:  { discordId },
-  });
-
-  const signature = secret === undefined
-    ? undefined
-    : computeHmac(JSON.stringify(stateToSave), secret);
-  return context.json({ savedAt: now, signature: signature });
-});
-
-gameRouter.post("/reset", async(context) => {
-  const discordId = context.get("discordId");
-
-  const playerRecord = await prisma.player.findUnique({ where: { discordId } });
-  if (!playerRecord) {
-    return context.json({ error: "No player found" }, 404);
-  }
-
-  const freshState = initialGameState(
-    {
-      avatar:                       playerRecord.avatar,
-      characterName:                playerRecord.characterName,
-      createdAt:                    playerRecord.createdAt,
-      discordId:                    playerRecord.discordId,
-      discriminator:                playerRecord.discriminator,
-      lastSavedAt:                  Date.now(),
-      lifetimeAchievementsUnlocked: playerRecord.lifetimeAchievementsUnlocked,
-      lifetimeAdventurersRecruited: playerRecord.lifetimeAdventurersRecruited,
-      lifetimeBossesDefeated:       playerRecord.lifetimeBossesDefeated,
-      lifetimeClicks:               playerRecord.lifetimeClicks,
-      lifetimeGoldEarned:           playerRecord.lifetimeGoldEarned,
-      lifetimeQuestsCompleted:      playerRecord.lifetimeQuestsCompleted,
-      totalClicks:                  0,
-      totalGoldEarned:              0,
-      username:                     playerRecord.username,
-    },
-    playerRecord.characterName,
-  );
-
-  const createdAt = Date.now();
-  await prisma.gameState.upsert({
-    create: {
-      discordId: discordId,
-      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-      state:     freshState as object,
-      updatedAt: createdAt,
-    },
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    update: { state: freshState as object, updatedAt: createdAt },
-    where:  { discordId },
-  });
-
-  const secret = process.env.ANTI_CHEAT_SECRET;
-  const signature = secret === undefined
-    ? undefined
-    : computeHmac(JSON.stringify(freshState), secret);
-
-  return context.json({
-    currentSchemaVersion: currentSchemaVersion,
-    loginBonus:           null,
-    loginStreak:          playerRecord.loginStreak,
-    offlineEssence:       0,
-    offlineGold:          0,
-    offlineSeconds:       0,
-    schemaOutdated:       false,
-    signature:            signature,
-    state:                freshState,
-  });
 });
 
 export { gameRouter };

apps/api/src/routes/leaderboards.ts

@@ -9,6 +9,7 @@
 import { Hono } from "hono";
 import { gameTitles } from "../data/titles.js";
 import { prisma } from "../db/client.js";
+import { logger } from "../services/logger.js";
 import type { HonoEnvironment } from "../types/hono.js";
 import type { GameState } from "@elysium/types";
 
@@ -58,70 +59,80 @@ const resolveTitleName = (titleId: string | null): string => {
 };
 
 leaderboardRouter.get("/", async(context) => {
-  const category = context.req.query("category") ?? "totalGold";
-  const limitRaw = Number(context.req.query("limit") ?? "100");
-  const limit = Math.min(Math.max(1, limitRaw), 100);
+  try {
+    const category = context.req.query("category") ?? "totalGold";
+    const limitRaw = Number(context.req.query("limit") ?? "100");
+    const limit = Math.min(Math.max(1, limitRaw), 100);
 
-  if (!validCategories.has(category)) {
-    return context.json({ error: "Invalid category" }, 400);
-  }
+    if (!validCategories.has(category)) {
+      return context.json({ error: "Invalid category" }, 400);
+    }
 
-  const [ players, gameStates ] = await Promise.all([
-    prisma.player.findMany(),
-    gameStateCategories.has(category)
-      ? prisma.gameState.findMany()
-      : Promise.resolve([]),
-  ]);
+    const [ players, gameStates ] = await Promise.all([
+      prisma.player.findMany(),
+      gameStateCategories.has(category)
+        ? prisma.gameState.findMany()
+        : Promise.resolve([]),
+    ]);
 
-  const stateMap = new Map(
-    gameStates.map((gs) => {
-      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-      return [ gs.discordId, gs.state as unknown as GameState ];
-    }),
-  );
+    const stateMap = new Map(
+      gameStates.map((gs) => {
+        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+        return [ gs.discordId, gs.state as unknown as GameState ];
+      }),
+    );
 
-  const entries = players.
-    filter((player) => {
-      return parseShowOnLeaderboards(player.profileSettings);
-    }).
-    map((player) => {
-      let value = 0;
-      if (category === "totalGold") {
-        value = player.lifetimeGoldEarned;
-      } else if (category === "bossesDefeated") {
-        value = player.lifetimeBossesDefeated;
-      } else if (category === "questsCompleted") {
-        value = player.lifetimeQuestsCompleted;
-      } else if (category === "achievementsUnlocked") {
-        value = player.lifetimeAchievementsUnlocked;
-      } else {
-        const state = stateMap.get(player.discordId);
-        if (category === "prestigeCount") {
-          value = state?.prestige.count ?? 0;
-        } else if (category === "transcendenceCount") {
-          value = state?.transcendence?.count ?? 0;
-        } else if (category === "apotheosisCount") {
-          value = state?.apotheosis?.count ?? 0;
+    const entries = players.
+      filter((player) => {
+        return parseShowOnLeaderboards(player.profileSettings);
+      }).
+      map((player) => {
+        let value = 0;
+        if (category === "totalGold") {
+          value = player.lifetimeGoldEarned;
+        } else if (category === "bossesDefeated") {
+          value = player.lifetimeBossesDefeated;
+        } else if (category === "questsCompleted") {
+          value = player.lifetimeQuestsCompleted;
+        } else if (category === "achievementsUnlocked") {
+          value = player.lifetimeAchievementsUnlocked;
+        } else {
+          const state = stateMap.get(player.discordId);
+          if (category === "prestigeCount") {
+            value = state?.prestige.count ?? 0;
+          } else if (category === "transcendenceCount") {
+            value = state?.transcendence?.count ?? 0;
+          } else if (category === "apotheosisCount") {
+            value = state?.apotheosis?.count ?? 0;
+          }
         }
-      }
-      return {
-        activeTitle:   resolveTitleName(player.activeTitle),
-        avatar:        player.avatar ?? null,
-        characterName: player.characterName,
-        discordId:     player.discordId,
-        username:      player.username,
-        value:         value,
-      };
-    }).
-    sort((a, b) => {
-      return b.value - a.value;
-    }).
-    slice(0, limit).
-    map((entry, index) => {
-      return { ...entry, rank: index + 1 };
-    });
+        return {
+          activeTitle:   resolveTitleName(player.activeTitle),
+          avatar:        player.avatar ?? null,
+          characterName: player.characterName,
+          discordId:     player.discordId,
+          username:      player.username,
+          value:         value,
+        };
+      }).
+      sort((a, b) => {
+        return b.value - a.value;
+      }).
+      slice(0, limit).
+      map((entry, index) => {
+        return { ...entry, rank: index + 1 };
+      });
 
-  return context.json({ category, entries });
+    return context.json({ category, entries });
+  } catch (error) {
+    void logger.error(
+      "leaderboards",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { leaderboardRouter };

apps/api/src/routes/prestige.ts

@@ -6,11 +6,13 @@
  */
 /* eslint-disable max-lines-per-function -- Route handlers require many steps */
 /* eslint-disable max-statements -- Route handlers require many statements */
+/* eslint-disable complexity -- Route handlers have inherent complexity */
 import { Hono } from "hono";
 import { defaultPrestigeUpgrades } from "../data/prestigeUpgrades.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
 import { updateChallengeProgress } from "../services/dailyChallenges.js";
+import { logger } from "../services/logger.js";
 import {
   buildPostPrestigeState,
   computeRunestoneMultipliers,
@@ -25,190 +27,217 @@ const prestigeRouter = new Hono<HonoEnvironment>();
 prestigeRouter.use("*", authMiddleware);
 
 prestigeRouter.post("/", async(context) => {
-  const discordId = context.get("discordId");
+  try {
+    const discordId = context.get("discordId");
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
 
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-  const state = record.state as unknown as GameState;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+    const state = record.state as unknown as GameState;
 
-  if (!isEligibleForPrestige(state)) {
-    return context.json(
-      {
-        error: "Not eligible for prestige — collect 1,000,000 total gold first",
+    if (!isEligibleForPrestige(state)) {
+      return context.json(
+        {
+          // eslint-disable-next-line stylistic/max-len -- Error message cannot be shortened
+          error: "Not eligible for prestige — collect 1,000,000 total gold first",
+        },
+        400,
+      );
+    }
+
+    // Update daily prestige challenge progress before resetting the run
+    let updatedDailyChallenges = state.dailyChallenges;
+    let challengeCrystals = 0;
+    if (updatedDailyChallenges) {
+      const result = updateChallengeProgress(
+        updatedDailyChallenges,
+        "prestige",
+        1,
+      );
+      updatedDailyChallenges = result.updatedChallenges;
+      challengeCrystals = result.crystalsAwarded;
+    }
+
+    const {
+      milestoneRunestones,
+      prestigeData,
+      prestigeState,
+      runestonesEarned,
+    } = buildPostPrestigeState(state, state.player.characterName);
+
+    // Preserve daily challenges across the prestige reset and apply any crystal rewards
+    const finalState: GameState = {
+      ...prestigeState,
+      ...updatedDailyChallenges === undefined
+        ? {}
+        : { dailyChallenges: updatedDailyChallenges },
+      resources: {
+        ...prestigeState.resources,
+        crystals: prestigeState.resources.crystals + challengeCrystals,
       },
-      400,
-    );
-  }
+    };
 
-  // Update daily prestige challenge progress before resetting the run
-  let updatedDailyChallenges = state.dailyChallenges;
-  let challengeCrystals = 0;
-  if (updatedDailyChallenges) {
-    const result = updateChallengeProgress(
-      updatedDailyChallenges,
+    // Capture current-run stats to accumulate into lifetime totals before resetting
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 10 -- @preserve */
+    const runBossesDefeated = state.bosses.filter((boss) => {
+      return boss.status === "defeated";
+    }).length;
+    const runQuestsCompleted = state.quests.filter((quest) => {
+      return quest.status === "completed";
+    }).length;
+    let runAdventurersRecruited = 0;
+    for (const adventurer of state.adventurers) {
+      runAdventurersRecruited = runAdventurersRecruited + adventurer.count;
+    }
+
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 3 -- @preserve */
+    const runAchievementsUnlocked = state.achievements.filter((achievement) => {
+      return achievement.unlockedAt !== null;
+    }).length;
+
+    const now = Date.now();
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: finalState as object, updatedAt: now },
+      where: { discordId },
+    });
+
+    await prisma.player.update({
+      data: {
+        characterName: state.player.characterName,
+
+        lastSavedAt: now,
+
+        lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
+
+        lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
+
+        lifetimeBossesDefeated: { increment: runBossesDefeated },
+
+        lifetimeClicks: { increment: state.player.totalClicks },
+
+        // Accumulate into lifetime totals — never reset
+        lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
+
+        lifetimeQuestsCompleted: { increment: runQuestsCompleted },
+
+        totalClicks:     0,
+        // Reset current-run counters
+        totalGoldEarned: 0,
+      },
+      where: { discordId },
+    });
+
+    const prestigeCount = prestigeData.count;
+    void logger.metric("prestige", 1, { discordId, prestigeCount });
+    void postMilestoneWebhook(discordId, "prestige", {
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      apotheosis: prestigeState.apotheosis?.count ?? 0,
+
+      prestige: prestigeData.count,
+
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 2 -- @preserve */
+      transcendence: prestigeState.transcendence?.count ?? 0,
+    });
+
+    return context.json({
+      milestoneRunestones: milestoneRunestones,
+      newPrestigeCount:    prestigeData.count, // eslint-disable-line unicorn/no-keyword-prefix -- API response field name required by client
+      runestones:          runestonesEarned,
+    });
+  } catch (error) {
+    void logger.error(
       "prestige",
-      1,
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
     );
-    updatedDailyChallenges = result.updatedChallenges;
-    challengeCrystals = result.crystalsAwarded;
+    return context.json({ error: "Internal server error" }, 500);
   }
-
-  const {
-    milestoneRunestones,
-    prestigeData,
-    prestigeState,
-    runestonesEarned,
-  } = buildPostPrestigeState(state, state.player.characterName);
-
-  // Preserve daily challenges across the prestige reset and apply any crystal rewards
-  const finalState: GameState = {
-    ...prestigeState,
-    ...updatedDailyChallenges === undefined
-      ? {}
-      : { dailyChallenges: updatedDailyChallenges },
-    resources: {
-      ...prestigeState.resources,
-      crystals: prestigeState.resources.crystals + challengeCrystals,
-    },
-  };
-
-  // Capture current-run stats to accumulate into lifetime totals before resetting
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 10 -- @preserve */
-  const runBossesDefeated = state.bosses.filter((boss) => {
-    return boss.status === "defeated";
-  }).length;
-  const runQuestsCompleted = state.quests.filter((quest) => {
-    return quest.status === "completed";
-  }).length;
-  let runAdventurersRecruited = 0;
-  for (const adventurer of state.adventurers) {
-    runAdventurersRecruited = runAdventurersRecruited + adventurer.count;
-  }
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 3 -- @preserve */
-  const runAchievementsUnlocked = state.achievements.filter((achievement) => {
-    return achievement.unlockedAt !== null;
-  }).length;
-
-  const now = Date.now();
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: finalState as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  await prisma.player.update({
-    data: {
-      characterName: state.player.characterName,
-
-      lastSavedAt: now,
-
-      lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
-
-      lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
-
-      lifetimeBossesDefeated: { increment: runBossesDefeated },
-
-      lifetimeClicks: { increment: state.player.totalClicks },
-
-      // Accumulate into lifetime totals — never reset
-      lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
-
-      lifetimeQuestsCompleted: { increment: runQuestsCompleted },
-
-      totalClicks:     0,
-      // Reset current-run counters
-      totalGoldEarned: 0,
-    },
-    where: { discordId },
-  });
-
-  void postMilestoneWebhook(discordId, "prestige", {
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    apotheosis: prestigeState.apotheosis?.count ?? 0,
-
-    prestige: prestigeData.count,
-
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next 2 -- @preserve */
-    transcendence: prestigeState.transcendence?.count ?? 0,
-  });
-
-  return context.json({
-    milestoneRunestones: milestoneRunestones,
-    newPrestigeCount:    prestigeData.count, // eslint-disable-line unicorn/no-keyword-prefix -- API response field name required by client
-    runestones:          runestonesEarned,
-  });
 });
 
 prestigeRouter.post("/buy-upgrade", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<BuyPrestigeUpgradeRequest>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<BuyPrestigeUpgradeRequest>();
 
-  const { upgradeId } = body;
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!upgradeId) {
-    return context.json({ error: "upgradeId is required" }, 400);
-  }
+    const { upgradeId } = body;
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!upgradeId) {
+      return context.json({ error: "upgradeId is required" }, 400);
+    }
 
-  const upgrade = defaultPrestigeUpgrades.find((prestigeUpgrade) => {
-    return prestigeUpgrade.id === upgradeId;
-  });
-  if (!upgrade) {
-    return context.json({ error: "Unknown prestige upgrade" }, 404);
-  }
+    const upgrade = defaultPrestigeUpgrades.find((prestigeUpgrade) => {
+      return prestigeUpgrade.id === upgradeId;
+    });
+    if (!upgrade) {
+      return context.json({ error: "Unknown prestige upgrade" }, 404);
+    }
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-  const state = record.state as unknown as GameState;
-  const { purchasedUpgradeIds, runestones } = state.prestige;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+    const state = record.state as unknown as GameState;
+    const { purchasedUpgradeIds, runestones } = state.prestige;
 
-  if (purchasedUpgradeIds.includes(upgradeId)) {
-    return context.json({ error: "Upgrade already purchased" }, 400);
-  }
+    if (purchasedUpgradeIds.includes(upgradeId)) {
+      return context.json({ error: "Upgrade already purchased" }, 400);
+    }
 
-  if (runestones < upgrade.runestonesCost) {
-    return context.json({ error: "Not enough runestones" }, 400);
-  }
+    if (runestones < upgrade.runestonesCost) {
+      return context.json({ error: "Not enough runestones" }, 400);
+    }
 
-  const updatedRunestones = runestones - upgrade.runestonesCost;
-  const updatedPurchasedUpgradeIds = [ ...purchasedUpgradeIds, upgradeId ];
+    const updatedRunestones = runestones - upgrade.runestonesCost;
+    const updatedPurchasedUpgradeIds = [ ...purchasedUpgradeIds, upgradeId ];
 
-  const updatedState: GameState = {
-    ...state,
-    prestige: {
-      ...state.prestige,
+    const updatedState: GameState = {
+      ...state,
+      prestige: {
+        ...state.prestige,
+        purchasedUpgradeIds: updatedPurchasedUpgradeIds,
+        runestones:          updatedRunestones,
+        ...computeRunestoneMultipliers(updatedPurchasedUpgradeIds),
+      },
+    };
+
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: updatedState as object, updatedAt: Date.now() },
+      where: { discordId },
+    });
+
+    const multipliers = computeRunestoneMultipliers(updatedPurchasedUpgradeIds);
+
+    void logger.metric("prestige_upgrade_purchased", 1, {
+      discordId,
+      upgradeId,
+    });
+    return context.json({
       purchasedUpgradeIds: updatedPurchasedUpgradeIds,
-      runestones:          updatedRunestones,
-      ...computeRunestoneMultipliers(updatedPurchasedUpgradeIds),
-    },
-  };
-
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: updatedState as object, updatedAt: Date.now() },
-    where: { discordId },
-  });
-
-  const multipliers = computeRunestoneMultipliers(updatedPurchasedUpgradeIds);
-
-  return context.json({
-    purchasedUpgradeIds: updatedPurchasedUpgradeIds,
-    runestonesRemaining: updatedRunestones,
-    ...multipliers,
-  });
+      runestonesRemaining: updatedRunestones,
+      ...multipliers,
+    });
+  } catch (error) {
+    void logger.error(
+      "prestige_buy_upgrade",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { prestigeRouter };

apps/api/src/routes/profile.ts

@@ -20,6 +20,7 @@ import { Hono } from "hono";
 import { gameTitles } from "../data/titles.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
+import { logger } from "../services/logger.js";
 import { parseUnlockedTitles } from "../services/titles.js";
 import type { HonoEnvironment } from "../types/hono.js";
 
@@ -81,190 +82,210 @@ const resolveTitle = (id: string): { id: string; name: string } => {
 };
 
 profileRouter.get("/:discordId", async(context) => {
-  const { discordId } = context.req.param();
+  try {
+    const { discordId } = context.req.param();
 
-  const [ player, gameStateRecord ] = await Promise.all([
-    prisma.player.findUnique({ where: { discordId } }),
-    prisma.gameState.findUnique({ where: { discordId } }),
-  ]);
+    const [ player, gameStateRecord ] = await Promise.all([
+      prisma.player.findUnique({ where: { discordId } }),
+      prisma.gameState.findUnique({ where: { discordId } }),
+    ]);
 
-  if (!player) {
-    return context.json({ error: "Player not found" }, 404);
-  }
+    if (!player) {
+      return context.json({ error: "Player not found" }, 404);
+    }
 
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-  const state = gameStateRecord?.state as unknown as GameState | undefined;
-  const prestigeCount = state?.prestige.count ?? 0;
-  const transcendenceCount = state?.transcendence?.count ?? 0;
-  const apotheosisCount = state?.apotheosis?.count ?? 0;
-  const profileSettings = parseProfileSettings(player.profileSettings);
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+    const state = gameStateRecord?.state as unknown as GameState | undefined;
+    const prestigeCount = state?.prestige.count ?? 0;
+    const transcendenceCount = state?.transcendence?.count ?? 0;
+    const apotheosisCount = state?.apotheosis?.count ?? 0;
+    const profileSettings = parseProfileSettings(player.profileSettings);
 
-  const bossesDefeated
-    = state?.bosses.filter((boss) => {
-      return boss.status === "defeated";
-    }).length ?? 0;
-  const questsCompleted
-    = state?.quests.filter((quest) => {
-      return quest.status === "completed";
-    }).length ?? 0;
+    const bossesDefeated
+      = state?.bosses.filter((boss) => {
+        return boss.status === "defeated";
+      }).length ?? 0;
+    const questsCompleted
+      = state?.quests.filter((quest) => {
+        return quest.status === "completed";
+      }).length ?? 0;
+
+    let adventurersRecruited = 0;
+    if (state) {
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next 3 -- @preserve */
+      for (const adventurer of state.adventurers) {
+        adventurersRecruited = adventurersRecruited + adventurer.count;
+      }
+    }
 
-  let adventurersRecruited = 0;
-  if (state) {
     // eslint-disable-next-line capitalized-comments -- v8 ignore
     /* v8 ignore next 3 -- @preserve */
-    for (const adventurer of state.adventurers) {
-      adventurersRecruited = adventurersRecruited + adventurer.count;
-    }
-  }
+    const achievementsUnlocked = (state?.achievements ?? []).filter((achievement) => {
+      return achievement.unlockedAt !== null;
+    }).length;
 
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 3 -- @preserve */
-  const achievementsUnlocked = (state?.achievements ?? []).filter((achievement) => {
-    return achievement.unlockedAt !== null;
-  }).length;
-
-  const unlockedTitleIds = parseUnlockedTitles(player.unlockedTitles);
-  const unlockedTitles = unlockedTitleIds.map((id) => {
-    return resolveTitle(id);
-  });
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 12 -- @preserve */
-  const equippedItems = (state?.equipment ?? []).
-    filter((item) => {
-      return item.owned && item.equipped;
-    }).
-    map((item) => {
-      return {
-        bonus:  item.bonus,
-        name:   item.name,
-        rarity: item.rarity,
-        type:   item.type,
-      };
+    const unlockedTitleIds = parseUnlockedTitles(player.unlockedTitles);
+    const unlockedTitles = unlockedTitleIds.map((id) => {
+      return resolveTitle(id);
     });
 
-  const completedChapters = state?.story?.completedChapters ?? [];
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 12 -- @preserve */
+    const equippedItems = (state?.equipment ?? []).
+      filter((item) => {
+        return item.owned && item.equipped;
+      }).
+      map((item) => {
+        return {
+          bonus:  item.bonus,
+          name:   item.name,
+          rarity: item.rarity,
+          type:   item.type,
+        };
+      });
 
-  return context.json({
-    achievementsUnlocked: achievementsUnlocked,
-    activeTitle: player.activeTitle,
-    adventurersRecruited: adventurersRecruited,
-    apotheosisCount: apotheosisCount,
-    avatar: player.avatar,
-    bio: player.bio ?? "",
-    bossesDefeated: bossesDefeated,
-    characterClass: player.characterClass,
-    characterName: player.characterName,
-    characterRace: player.characterRace ?? "",
-    completedChapters: completedChapters,
-    createdAt: player.createdAt,
-    currentRunClicks: state?.player.totalClicks ?? 0,
-    currentRunGold: state?.player.totalGoldEarned ?? 0,
-    equippedItems: equippedItems,
-    guildDescription: player.guildDescription,
-    guildName: player.guildName,
-    lifetimeAchievementsUnlocked: player.lifetimeAchievementsUnlocked,
-    lifetimeAdventurersRecruited: player.lifetimeAdventurersRecruited,
-    lifetimeBossesDefeated: player.lifetimeBossesDefeated,
-    lifetimeQuestsCompleted: player.lifetimeQuestsCompleted,
-    prestigeCount: prestigeCount,
-    profileSettings: profileSettings,
-    pronouns: player.pronouns ?? "",
-    questsCompleted: questsCompleted,
-    totalClicks: player.lifetimeClicks,
-    totalGoldEarned: player.lifetimeGoldEarned,
-    transcendenceCount: transcendenceCount,
-    unlockedTitles: unlockedTitles,
-    username: player.username,
-  });
+    const completedChapters = state?.story?.completedChapters ?? [];
+
+    return context.json({
+      achievementsUnlocked: achievementsUnlocked,
+      activeTitle: player.activeTitle,
+      adventurersRecruited: adventurersRecruited,
+      apotheosisCount: apotheosisCount,
+      avatar: player.avatar,
+      bio: player.bio ?? "",
+      bossesDefeated: bossesDefeated,
+      characterClass: player.characterClass,
+      characterName: player.characterName,
+      characterRace: player.characterRace ?? "",
+      completedChapters: completedChapters,
+      createdAt: player.createdAt,
+      currentRunClicks: state?.player.totalClicks ?? 0,
+      currentRunGold: state?.player.totalGoldEarned ?? 0,
+      equippedItems: equippedItems,
+      guildDescription: player.guildDescription,
+      guildName: player.guildName,
+      lifetimeAchievementsUnlocked: player.lifetimeAchievementsUnlocked,
+      lifetimeAdventurersRecruited: player.lifetimeAdventurersRecruited,
+      lifetimeBossesDefeated: player.lifetimeBossesDefeated,
+      lifetimeQuestsCompleted: player.lifetimeQuestsCompleted,
+      prestigeCount: prestigeCount,
+      profileSettings: profileSettings,
+      pronouns: player.pronouns ?? "",
+      questsCompleted: questsCompleted,
+      totalClicks: player.lifetimeClicks,
+      totalGoldEarned: player.lifetimeGoldEarned,
+      transcendenceCount: transcendenceCount,
+      unlockedTitles: unlockedTitles,
+      username: player.username,
+    });
+  } catch (error) {
+    void logger.error(
+      "profile_get",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 profileRouter.put("/", authMiddleware, async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<UpdateProfileRequest>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<UpdateProfileRequest>();
 
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!body.characterName) {
-    return context.json({ error: "Character name cannot be empty" }, 400);
-  }
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!body.characterName) {
+      return context.json({ error: "Character name cannot be empty" }, 400);
+    }
 
-  const characterName = body.characterName.trim().slice(0, 32);
+    const characterName = body.characterName.trim().slice(0, 32);
 
-  if (characterName === "") {
-    return context.json({ error: "Character name cannot be empty" }, 400);
-  }
+    if (characterName === "") {
+      return context.json({ error: "Character name cannot be empty" }, 400);
+    }
 
-  const pronouns = (body.pronouns ?? "").trim().slice(0, 20);
-  const characterRace = (body.characterRace ?? "").trim().slice(0, 32);
-  const characterClass = (body.characterClass ?? "").trim().slice(0, 32);
-  const bio = (body.bio ?? "").trim().slice(0, 200);
-  const guildName = (body.guildName ?? "").trim().slice(0, 64);
-  const guildDescription = (body.guildDescription ?? "").trim().slice(0, 500);
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 2 -- @preserve */
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Runtime shape check */
-  const parsedNumberFormat = (body.profileSettings.numberFormat ?? "") as string;
-  const numberFormat = validNumberFormats.has(parsedNumberFormat)
+    const pronouns = (body.pronouns ?? "").trim().slice(0, 20);
+    const characterRace = (body.characterRace ?? "").trim().slice(0, 32);
+    const characterClass = (body.characterClass ?? "").trim().slice(0, 32);
+    const bio = (body.bio ?? "").trim().slice(0, 200);
+    const guildName = (body.guildName ?? "").trim().slice(0, 64);
+    const guildDescription = (body.guildDescription ?? "").trim().slice(0, 500);
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 2 -- @preserve */
     /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Runtime shape check */
-    ? (parsedNumberFormat as ProfileSettings["numberFormat"])
-    : "suffix";
-  const profileSettings: ProfileSettings = {
-    enableNotifications: body.profileSettings.enableNotifications ?? false,
-    enableSounds: body.profileSettings.enableSounds ?? false,
-    numberFormat: numberFormat,
-    showAchievementsUnlocked: body.profileSettings.showAchievementsUnlocked ?? true,
-    showAdventurersRecruited: body.profileSettings.showAdventurersRecruited ?? true,
-    showApotheosis: body.profileSettings.showApotheosis ?? true,
-    showBossesDefeated: body.profileSettings.showBossesDefeated ?? true,
-    showCurrentClicks: body.profileSettings.showCurrentClicks ?? true,
-    showCurrentGold: body.profileSettings.showCurrentGold ?? true,
-    showGuildFounded: body.profileSettings.showGuildFounded ?? true,
-    showLifetimeAchievementsUnlocked: body.profileSettings.showLifetimeAchievementsUnlocked ?? true,
-    showLifetimeAdventurersRecruited: body.profileSettings.showLifetimeAdventurersRecruited ?? true,
-    showLifetimeBossesDefeated: body.profileSettings.showLifetimeBossesDefeated ?? true,
-    showLifetimeQuestsCompleted: body.profileSettings.showLifetimeQuestsCompleted ?? true,
-    showOnLeaderboards: body.profileSettings.showOnLeaderboards ?? true,
-    showPrestige: body.profileSettings.showPrestige ?? true,
-    showQuestsCompleted: body.profileSettings.showQuestsCompleted ?? true,
-    showTotalClicks: body.profileSettings.showTotalClicks ?? true,
-    showTotalGold: body.profileSettings.showTotalGold ?? true,
-    showTranscendence: body.profileSettings.showTranscendence ?? true,
-  };
+    const parsedNumberFormat = (body.profileSettings.numberFormat ?? "") as string;
+    const numberFormat = validNumberFormats.has(parsedNumberFormat)
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Runtime shape check */
+      ? (parsedNumberFormat as ProfileSettings["numberFormat"])
+      : "suffix";
+    const profileSettings: ProfileSettings = {
+      enableNotifications: body.profileSettings.enableNotifications ?? false,
+      enableSounds: body.profileSettings.enableSounds ?? false,
+      numberFormat: numberFormat,
+      showAchievementsUnlocked: body.profileSettings.showAchievementsUnlocked ?? true,
+      showAdventurersRecruited: body.profileSettings.showAdventurersRecruited ?? true,
+      showApotheosis: body.profileSettings.showApotheosis ?? true,
+      showBossesDefeated: body.profileSettings.showBossesDefeated ?? true,
+      showCurrentClicks: body.profileSettings.showCurrentClicks ?? true,
+      showCurrentGold: body.profileSettings.showCurrentGold ?? true,
+      showGuildFounded: body.profileSettings.showGuildFounded ?? true,
+      showLifetimeAchievementsUnlocked: body.profileSettings.showLifetimeAchievementsUnlocked ?? true,
+      showLifetimeAdventurersRecruited: body.profileSettings.showLifetimeAdventurersRecruited ?? true,
+      showLifetimeBossesDefeated: body.profileSettings.showLifetimeBossesDefeated ?? true,
+      showLifetimeQuestsCompleted: body.profileSettings.showLifetimeQuestsCompleted ?? true,
+      showOnLeaderboards: body.profileSettings.showOnLeaderboards ?? true,
+      showPrestige: body.profileSettings.showPrestige ?? true,
+      showQuestsCompleted: body.profileSettings.showQuestsCompleted ?? true,
+      showTotalClicks: body.profileSettings.showTotalClicks ?? true,
+      showTotalGold: body.profileSettings.showTotalGold ?? true,
+      showTranscendence: body.profileSettings.showTranscendence ?? true,
+    };
 
-  const activeTitle
-    = typeof body.activeTitle === "string"
-      ? body.activeTitle.slice(0, 64)
-      : undefined;
+    const activeTitle
+      = typeof body.activeTitle === "string"
+        ? body.activeTitle.slice(0, 64)
+        : undefined;
 
-  const updated = await prisma.player.update({
-    data: {
-      bio: bio,
-      characterClass: characterClass,
-      characterName: characterName,
-      characterRace: characterRace,
-      guildDescription: guildDescription,
-      guildName: guildName,
-      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-      profileSettings: profileSettings as object,
-      pronouns: pronouns,
-      ...activeTitle === undefined
-        ? {}
-        : { activeTitle },
-    },
-    where: { discordId },
-  });
+    const updated = await prisma.player.update({
+      data: {
+        bio: bio,
+        characterClass: characterClass,
+        characterName: characterName,
+        characterRace: characterRace,
+        guildDescription: guildDescription,
+        guildName: guildName,
+        /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+        profileSettings: profileSettings as object,
+        pronouns: pronouns,
+        ...activeTitle === undefined
+          ? {}
+          : { activeTitle },
+      },
+      where: { discordId },
+    });
 
-  return context.json({
-    activeTitle: updated.activeTitle,
-    bio: updated.bio,
-    characterClass: updated.characterClass,
-    characterName: updated.characterName,
-    characterRace: updated.characterRace,
-    guildDescription: updated.guildDescription,
-    guildName: updated.guildName,
-    profileSettings: profileSettings,
-    pronouns: updated.pronouns,
-  });
+    return context.json({
+      activeTitle: updated.activeTitle,
+      bio: updated.bio,
+      characterClass: updated.characterClass,
+      characterName: updated.characterName,
+      characterRace: updated.characterRace,
+      guildDescription: updated.guildDescription,
+      guildName: updated.guildName,
+      profileSettings: profileSettings,
+      pronouns: updated.pronouns,
+    });
+  } catch (error) {
+    void logger.error(
+      "profile_update",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { profileRouter };

apps/api/src/routes/transcendence.ts

@@ -6,10 +6,12 @@
  */
 /* eslint-disable max-lines-per-function -- Route handlers require many steps */
 /* eslint-disable max-statements -- Route handlers require many statements */
+
 import { Hono } from "hono";
 import { defaultTranscendenceUpgrades } from "../data/transcendenceUpgrades.js";
 import { prisma } from "../db/client.js";
 import { authMiddleware } from "../middleware/auth.js";
+import { logger } from "../services/logger.js";
 import {
   buildPostTranscendenceState,
   computeTranscendenceMultipliers,
@@ -24,168 +26,196 @@ const transcendenceRouter = new Hono<HonoEnvironment>();
 transcendenceRouter.use("*", authMiddleware);
 
 transcendenceRouter.post("/", async(context) => {
-  const discordId = context.get("discordId");
+  try {
+    const discordId = context.get("discordId");
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-  const state = record.state as unknown as GameState;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+    const state = record.state as unknown as GameState;
 
-  if (!isEligibleForTranscendence(state)) {
-    return context.json(
-      {
-        error: "Not eligible for transcendence — defeat The Absolute One first",
+    if (!isEligibleForTranscendence(state)) {
+      return context.json(
+        {
+          // eslint-disable-next-line stylistic/max-len -- Error message cannot be shortened
+          error: "Not eligible for transcendence — defeat The Absolute One first",
+        },
+        400,
+      );
+    }
+
+    const {
+      echoesEarned,
+      transcendenceData,
+      transcendenceState,
+    } = buildPostTranscendenceState(state, state.player.characterName);
+
+    // Capture current-run stats before the nuclear reset
+    const runBossesDefeated = state.bosses.filter((boss) => {
+      return boss.status === "defeated";
+    }).length;
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 7 -- @preserve */
+    const runQuestsCompleted = state.quests.filter((quest) => {
+      return quest.status === "completed";
+    }).length;
+    let runAdventurersRecruited = 0;
+    for (const adventurer of state.adventurers) {
+      runAdventurersRecruited = runAdventurersRecruited + adventurer.count;
+    }
+
+    // eslint-disable-next-line capitalized-comments -- v8 ignore
+    /* v8 ignore next 3 -- @preserve */
+    const runAchievementsUnlocked = state.achievements.filter((achievement) => {
+      return achievement.unlockedAt !== null;
+    }).length;
+
+    const now = Date.now();
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: transcendenceState as object, updatedAt: now },
+      where: { discordId },
+    });
+
+    await prisma.player.update({
+      data: {
+        characterName: state.player.characterName,
+
+        lastSavedAt: now,
+
+        lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
+
+        lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
+
+        lifetimeBossesDefeated: { increment: runBossesDefeated },
+
+        lifetimeClicks: { increment: state.player.totalClicks },
+
+        // Accumulate into lifetime totals
+        lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
+
+        lifetimeQuestsCompleted: { increment: runQuestsCompleted },
+
+        totalClicks:     0,
+        // Reset current-run counters (same as prestige)
+        totalGoldEarned: 0,
       },
-      400,
+      where: { discordId },
+    });
+
+    const transcendenceCount = transcendenceData.count;
+    void logger.metric("transcendence", 1, { discordId, transcendenceCount });
+    void postMilestoneWebhook(discordId, "transcendence", {
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      // eslint-disable-next-line capitalized-comments -- v8 ignore
+      /* v8 ignore next -- @preserve */
+      apotheosis: transcendenceState.apotheosis?.count ?? 0,
+
+      prestige: transcendenceState.prestige.count,
+
+      transcendence: transcendenceData.count,
+    });
+
+    return context.json({
+      echoes:                echoesEarned,
+      // eslint-disable-next-line unicorn/no-keyword-prefix -- API response field name required by client
+      newTranscendenceCount: transcendenceData.count,
+    });
+  } catch (error) {
+    void logger.error(
+      "transcendence",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
     );
+    return context.json({ error: "Internal server error" }, 500);
   }
-
-  const {
-    echoesEarned,
-    transcendenceData,
-    transcendenceState,
-  } = buildPostTranscendenceState(state, state.player.characterName);
-
-  // Capture current-run stats before the nuclear reset
-  const runBossesDefeated = state.bosses.filter((boss) => {
-    return boss.status === "defeated";
-  }).length;
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 7 -- @preserve */
-  const runQuestsCompleted = state.quests.filter((quest) => {
-    return quest.status === "completed";
-  }).length;
-  let runAdventurersRecruited = 0;
-  for (const adventurer of state.adventurers) {
-    runAdventurersRecruited = runAdventurersRecruited + adventurer.count;
-  }
-
-  // eslint-disable-next-line capitalized-comments -- v8 ignore
-  /* v8 ignore next 3 -- @preserve */
-  const runAchievementsUnlocked = state.achievements.filter((achievement) => {
-    return achievement.unlockedAt !== null;
-  }).length;
-
-  const now = Date.now();
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: transcendenceState as object, updatedAt: now },
-    where: { discordId },
-  });
-
-  await prisma.player.update({
-    data: {
-      characterName: state.player.characterName,
-
-      lastSavedAt: now,
-
-      lifetimeAchievementsUnlocked: { increment: runAchievementsUnlocked },
-
-      lifetimeAdventurersRecruited: { increment: runAdventurersRecruited },
-
-      lifetimeBossesDefeated: { increment: runBossesDefeated },
-
-      lifetimeClicks: { increment: state.player.totalClicks },
-
-      // Accumulate into lifetime totals
-      lifetimeGoldEarned: { increment: state.player.totalGoldEarned },
-
-      lifetimeQuestsCompleted: { increment: runQuestsCompleted },
-
-      totalClicks:     0,
-      // Reset current-run counters (same as prestige)
-      totalGoldEarned: 0,
-    },
-    where: { discordId },
-  });
-
-  void postMilestoneWebhook(discordId, "transcendence", {
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    // eslint-disable-next-line capitalized-comments -- v8 ignore
-    /* v8 ignore next -- @preserve */
-    apotheosis: transcendenceState.apotheosis?.count ?? 0,
-
-    prestige: transcendenceState.prestige.count,
-
-    transcendence: transcendenceData.count,
-  });
-
-  return context.json({
-    echoes:                echoesEarned,
-    // eslint-disable-next-line unicorn/no-keyword-prefix -- API response field name required by client
-    newTranscendenceCount: transcendenceData.count,
-  });
 });
 
 transcendenceRouter.post("/buy-upgrade", async(context) => {
-  const discordId = context.get("discordId");
-  const body = await context.req.json<BuyEchoUpgradeRequest>();
+  try {
+    const discordId = context.get("discordId");
+    const body = await context.req.json<BuyEchoUpgradeRequest>();
 
-  const { upgradeId } = body;
-  // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
-  if (!upgradeId) {
-    return context.json({ error: "upgradeId is required" }, 400);
-  }
+    const { upgradeId } = body;
+    // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions -- Runtime body validation
+    if (!upgradeId) {
+      return context.json({ error: "upgradeId is required" }, 400);
+    }
 
-  const upgrade = defaultTranscendenceUpgrades.find((transcendenceUpgrade) => {
-    return transcendenceUpgrade.id === upgradeId;
-  });
-  if (!upgrade) {
-    return context.json({ error: "Unknown echo upgrade" }, 404);
-  }
+    // eslint-disable-next-line stylistic/max-len -- Variable name mirrors the data source for clarity
+    const upgrade = defaultTranscendenceUpgrades.find((transcendenceUpgrade) => {
+      return transcendenceUpgrade.id === upgradeId;
+    });
+    if (!upgrade) {
+      return context.json({ error: "Unknown echo upgrade" }, 404);
+    }
 
-  const record = await prisma.gameState.findUnique({ where: { discordId } });
-  if (!record) {
-    return context.json({ error: "No save found" }, 404);
-  }
+    const record = await prisma.gameState.findUnique({ where: { discordId } });
+    if (!record) {
+      return context.json({ error: "No save found" }, 404);
+    }
 
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
-  const state = record.state as unknown as GameState;
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma returns JsonValue */
+    const state = record.state as unknown as GameState;
 
-  if (!state.transcendence) {
-    return context.json({ error: "No transcendence data found" }, 400);
-  }
+    if (!state.transcendence) {
+      return context.json({ error: "No transcendence data found" }, 400);
+    }
 
-  const { purchasedUpgradeIds, echoes } = state.transcendence;
+    const { purchasedUpgradeIds, echoes } = state.transcendence;
 
-  if (purchasedUpgradeIds.includes(upgradeId)) {
-    return context.json({ error: "Upgrade already purchased" }, 400);
-  }
+    if (purchasedUpgradeIds.includes(upgradeId)) {
+      return context.json({ error: "Upgrade already purchased" }, 400);
+    }
 
-  if (echoes < upgrade.cost) {
-    return context.json({ error: "Not enough echoes" }, 400);
-  }
+    if (echoes < upgrade.cost) {
+      return context.json({ error: "Not enough echoes" }, 400);
+    }
 
-  const updatedEchoes = echoes - upgrade.cost;
-  const updatedPurchasedIds = [ ...purchasedUpgradeIds, upgradeId ];
-  const updatedMultipliers
-    = computeTranscendenceMultipliers(updatedPurchasedIds);
+    const updatedEchoes = echoes - upgrade.cost;
+    const updatedPurchasedIds = [ ...purchasedUpgradeIds, upgradeId ];
+    const updatedMultipliers
+      = computeTranscendenceMultipliers(updatedPurchasedIds);
 
-  const updatedState: GameState = {
-    ...state,
-    transcendence: {
-      ...state.transcendence,
-      echoes:              updatedEchoes,
+    const updatedState: GameState = {
+      ...state,
+      transcendence: {
+        ...state.transcendence,
+        echoes:              updatedEchoes,
+        purchasedUpgradeIds: updatedPurchasedIds,
+        ...updatedMultipliers,
+      },
+    };
+
+    await prisma.gameState.update({
+      /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
+      data:  { state: updatedState as object, updatedAt: Date.now() },
+      where: { discordId },
+    });
+
+    void logger.metric("transcendence_upgrade_purchased", 1, {
+      discordId,
+      upgradeId,
+    });
+    return context.json({
+      echoesRemaining:     updatedEchoes,
       purchasedUpgradeIds: updatedPurchasedIds,
       ...updatedMultipliers,
-    },
-  };
-
-  await prisma.gameState.update({
-    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Prisma requires object */
-    data:  { state: updatedState as object, updatedAt: Date.now() },
-    where: { discordId },
-  });
-
-  return context.json({
-    echoesRemaining:     updatedEchoes,
-    purchasedUpgradeIds: updatedPurchasedIds,
-    ...updatedMultipliers,
-  });
+    });
+  } catch (error) {
+    void logger.error(
+      "transcendence_buy_upgrade",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    return context.json({ error: "Internal server error" }, 500);
+  }
 });
 
 export { transcendenceRouter };

apps/api/src/services/discord.ts

@@ -5,6 +5,7 @@
  * @author Naomi Carrigan
  */
 /* eslint-disable @typescript-eslint/naming-convention -- Discord API requires snake_case fields and HTTP headers require Pascal-Case */
+import { logger } from "./logger.js";
 
 interface DiscordTokenResponse {
   access_token:  string;
@@ -50,18 +51,28 @@ const exchangeCode = async(
     redirect_uri:  redirectUri,
   });
 
-  const response = await fetch("https://discord.com/api/v10/oauth2/token", {
-    body:    parameters.toString(),
-    headers: { "Content-Type": "application/x-www-form-urlencoded" },
-    method:  "POST",
-  });
+  try {
+    const response = await fetch("https://discord.com/api/v10/oauth2/token", {
+      body:    parameters.toString(),
+      headers: { "Content-Type": "application/x-www-form-urlencoded" },
+      method:  "POST",
+    });
 
-  if (!response.ok) {
-    throw new Error(`Discord token exchange failed: ${response.statusText}`);
+    if (!response.ok) {
+      throw new Error(`Discord token exchange failed: ${response.statusText}`);
+    }
+
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Response JSON matches DiscordTokenResponse shape */
+    return await (response.json() as Promise<DiscordTokenResponse>);
+  } catch (error) {
+    void logger.error(
+      "discord_exchange_code",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    throw error;
   }
-
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Response JSON matches DiscordTokenResponse shape */
-  return await (response.json() as Promise<DiscordTokenResponse>);
 };
 
 /**
@@ -73,16 +84,26 @@ const exchangeCode = async(
 const fetchDiscordUser = async(
   accessToken: string,
 ): Promise<DiscordUser> => {
-  const response = await fetch("https://discord.com/api/v10/users/@me", {
-    headers: { Authorization: `Bearer ${accessToken}` },
-  });
+  try {
+    const response = await fetch("https://discord.com/api/v10/users/@me", {
+      headers: { Authorization: `Bearer ${accessToken}` },
+    });
 
-  if (!response.ok) {
-    throw new Error(`Discord user fetch failed: ${response.statusText}`);
+    if (!response.ok) {
+      throw new Error(`Discord user fetch failed: ${response.statusText}`);
+    }
+
+    /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Response JSON matches DiscordUser shape */
+    return await (response.json() as Promise<DiscordUser>);
+  } catch (error) {
+    void logger.error(
+      "discord_fetch_user",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
+    throw error;
   }
-
-  /* eslint-disable-next-line @typescript-eslint/consistent-type-assertions -- Response JSON matches DiscordUser shape */
-  return await (response.json() as Promise<DiscordUser>);
 };
 
 /**

apps/api/src/services/logger.ts

@@ -0,0 +1,12 @@
+/**
+ * @file Logger service for handling logging.
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+
+import { Logger } from "@nhcarrigan/logger";
+
+const logger = new Logger("Elysium", process.env.LOG_TOKEN ?? "");
+
+export { logger };

apps/api/src/services/webhook.ts

@@ -5,6 +5,8 @@
  * @author Naomi Carrigan
  */
 /* eslint-disable @typescript-eslint/naming-convention -- Discord API requires snake_case and Pascal-case header names */
+import { logger } from "./logger.js";
+
 const discordApi = "https://discord.com/api/v10";
 
 /**
@@ -34,7 +36,13 @@ const grantApotheosisRole = async(discordId: string): Promise<void> => {
         method:  "PUT",
       },
     );
-  } catch {
+  } catch (error) {
+    void logger.error(
+      "webhook_apotheosis_role",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
     // Graceful degradation — role grant failure must not affect the apotheosis
   }
 };
@@ -81,7 +89,13 @@ const postMilestoneWebhook = async(
       headers: { "Content-Type": "application/json" },
       method:  "POST",
     });
-  } catch {
+  } catch (error) {
+    void logger.error(
+      "webhook_milestone",
+      error instanceof Error
+        ? error
+        : new Error(String(error)),
+    );
     // Graceful degradation — webhook failure must not affect the game action
   }
 };

apps/api/test/middleware/auth.spec.ts

@@ -55,4 +55,15 @@ describe("authMiddleware", () => {
     }));
     expect(res.status).toBe(401);
   });
+
+  it("returns 401 when verifyToken throws a non-Error value", async () => {
+    const { app, verifyToken } = await makeApp();
+    vi.mocked(verifyToken).mockImplementationOnce(() => {
+      throw "raw string error";
+    });
+    const res = await app.fetch(new Request("http://localhost/test", {
+      headers: { Authorization: "Bearer bad_token" },
+    }));
+    expect(res.status).toBe(401);
+  });
 });

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

@@ -80,6 +80,18 @@ describe("apotheosis route", () => {
     expect(res.status).toBe(400);
   });
 
+  it("returns 500 when the database throws", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+    const res = await post();
+    expect(res.status).toBe(500);
+  });
+
+  it("returns 500 when the database throws a non-Error value", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+    const res = await post();
+    expect(res.status).toBe(500);
+  });
+
   it("returns apotheosis count on success", async () => {
     // Need all 15 transcendence upgrades purchased for eligibility
     const allUpgradeIds = [

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

@@ -113,5 +113,14 @@ describe("auth route", () => {
       const location = res.headers.get("Location") ?? "";
       expect(location).toContain("error=auth_failed");
     });
+
+    it("redirects with error when callback throws a non-Error value", async () => {
+      const { app, exchangeCode } = await makeApp();
+      exchangeCode.mockRejectedValueOnce("raw string error");
+      const res = await app.fetch(new Request("http://localhost/auth/callback?code=bad_code"));
+      expect(res.status).toBe(302);
+      const location = res.headers.get("Location") ?? "";
+      expect(location).toContain("error=auth_failed");
+    });
   });
 });

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

@@ -293,4 +293,16 @@ describe("boss route", () => {
     const body = await res.json() as { won: boolean };
     expect(body.won).toBe(true);
   });
+
+  it("returns 500 when the database throws", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+    const res = await challenge({ bossId: "test_boss" });
+    expect(res.status).toBe(500);
+  });
+
+  it("returns 500 when the database throws a non-Error value", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+    const res = await challenge({ bossId: "test_boss" });
+    expect(res.status).toBe(500);
+  });
 });

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

@@ -143,4 +143,16 @@ describe("craft route", () => {
     expect(body.recipeId).toBe(TEST_RECIPE_ID);
     expect(body.bonusType).toBe("gold_income");
   });
+
+  it("returns 500 when the database throws", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+    const res = await post({ recipeId: TEST_RECIPE_ID });
+    expect(res.status).toBe(500);
+  });
+
+  it("returns 500 when the database throws a non-Error value", async () => {
+    vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+    const res = await post({ recipeId: TEST_RECIPE_ID });
+    expect(res.status).toBe(500);
+  });
 });

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

@@ -406,5 +406,31 @@ describe("explore route", () => {
       expect(body.materialsFound.some((m) => m.materialId === "verdant_sap")).toBe(true);
       mockRandom.mockRestore();
     });
+
+    it("returns 500 when the database throws on collect", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await postCollect({ areaId: TEST_AREA_ID });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value on collect", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await postCollect({ areaId: TEST_AREA_ID });
+      expect(res.status).toBe(500);
+    });
+  });
+
+  describe("POST /start error path", () => {
+    it("returns 500 when the database throws on start", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await postStart({ areaId: TEST_AREA_ID });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value on start", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await postStart({ areaId: TEST_AREA_ID });
+      expect(res.status).toBe(500);
+    });
   });
 });

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

@@ -0,0 +1,136 @@
+/* eslint-disable max-lines-per-function -- Test suites naturally have many cases */
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { Hono } from "hono";
+
+vi.mock("../../src/services/logger.js", () => ({
+  logger: {
+    log: vi.fn().mockResolvedValue(undefined),
+    error: vi.fn().mockResolvedValue(undefined),
+  },
+}));
+
+describe("frontend route", () => {
+  let loggerMock: { log: ReturnType<typeof vi.fn>; error: ReturnType<typeof vi.fn> };
+
+  beforeEach(async () => {
+    vi.clearAllMocks();
+    const { logger } = await import("../../src/services/logger.js");
+    loggerMock = logger as typeof loggerMock;
+  });
+
+  const makeApp = async () => {
+    const { frontendRouter } = await import("../../src/routes/frontend.js");
+    const app = new Hono();
+    app.route("/frontend", frontendRouter);
+    return app;
+  };
+
+  const postLog = async (body: unknown, contentType = "application/json") => {
+    const app = await makeApp();
+    return app.fetch(new Request("http://localhost/frontend/log", {
+      method: "POST",
+      headers: { "Content-Type": contentType },
+      body: typeof body === "string" ? body : JSON.stringify(body),
+    }));
+  };
+
+  const postError = async (body: unknown, contentType = "application/json") => {
+    const app = await makeApp();
+    return app.fetch(new Request("http://localhost/frontend/error", {
+      method: "POST",
+      headers: { "Content-Type": contentType },
+      body: typeof body === "string" ? body : JSON.stringify(body),
+    }));
+  };
+
+  describe("POST /log", () => {
+    it("returns 200 when level is debug and message is present", async () => {
+      const res = await postLog({ level: "debug", message: "test debug" });
+      expect(res.status).toBe(200);
+      const body = await res.json() as { ok: boolean };
+      expect(body.ok).toBe(true);
+    });
+
+    it("returns 200 when level is info and message is present", async () => {
+      const res = await postLog({ level: "info", message: "test info" });
+      expect(res.status).toBe(200);
+      const body = await res.json() as { ok: boolean };
+      expect(body.ok).toBe(true);
+    });
+
+    it("returns 200 when level is warn and message is present", async () => {
+      const res = await postLog({ level: "warn", message: "test warn" });
+      expect(res.status).toBe(200);
+      const body = await res.json() as { ok: boolean };
+      expect(body.ok).toBe(true);
+    });
+
+    it("returns 400 when level is invalid", async () => {
+      const res = await postLog({ level: "error", message: "test" });
+      expect(res.status).toBe(400);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("level and message are required");
+    });
+
+    it("returns 400 when level is missing", async () => {
+      const res = await postLog({ message: "test" });
+      expect(res.status).toBe(400);
+    });
+
+    it("returns 400 when message is missing", async () => {
+      const res = await postLog({ level: "info" });
+      expect(res.status).toBe(400);
+    });
+
+    it("returns 500 when request body is invalid JSON", async () => {
+      const res = await postLog("not valid json at all", "application/json");
+      expect(res.status).toBe(500);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("Internal server error");
+    });
+
+    it("returns 500 and covers non-Error branch when logger throws a raw value", async () => {
+      loggerMock.log.mockImplementationOnce(() => { throw "raw string error"; });
+      const res = await postLog({ level: "info", message: "test" });
+      expect(res.status).toBe(500);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("Internal server error");
+    });
+  });
+
+  describe("POST /error", () => {
+    it("returns 200 with valid context and message", async () => {
+      const res = await postError({ context: "SomeComponent", message: "Something went wrong" });
+      expect(res.status).toBe(200);
+      const body = await res.json() as { ok: boolean };
+      expect(body.ok).toBe(true);
+    });
+
+    it("returns 400 when context field is missing", async () => {
+      const res = await postError({ message: "Something went wrong" });
+      expect(res.status).toBe(400);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("context and message are required");
+    });
+
+    it("returns 400 when message field is missing", async () => {
+      const res = await postError({ context: "SomeComponent" });
+      expect(res.status).toBe(400);
+    });
+
+    it("returns 500 when request body is invalid JSON", async () => {
+      const res = await postError("not valid json at all", "application/json");
+      expect(res.status).toBe(500);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("Internal server error");
+    });
+
+    it("returns 500 and covers non-Error branch when logger throws a raw value", async () => {
+      loggerMock.error.mockImplementationOnce(() => { throw "raw string error"; });
+      const res = await postError({ context: "SomeComponent", message: "Something went wrong" });
+      expect(res.status).toBe(500);
+      const body = await res.json() as { error: string };
+      expect(body.error).toBe("Internal server error");
+    });
+  });
+});

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

@@ -420,6 +420,45 @@ describe("game route", () => {
     });
   });
 
+  describe("GET /load error path", () => {
+    it("returns 500 when the database throws during load", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await app.fetch(new Request("http://localhost/game/load"));
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during load", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await app.fetch(new Request("http://localhost/game/load"));
+      expect(res.status).toBe(500);
+    });
+  });
+
+  describe("POST /save error path", () => {
+    const save = (body: Record<string, unknown>) =>
+      app.fetch(new Request("http://localhost/game/save", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(body),
+      }));
+
+    it("returns 500 when the database throws during save", async () => {
+      const state = makeState();
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await save({ state });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during save", async () => {
+      const state = makeState();
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await save({ state });
+      expect(res.status).toBe(500);
+    });
+  });
+
   describe("POST /reset", () => {
     const reset = () =>
       app.fetch(new Request("http://localhost/game/reset", { method: "POST" }));
@@ -450,5 +489,17 @@ describe("game route", () => {
       const body = await res.json() as { signature: string | undefined };
       expect(typeof body.signature).toBe("string");
     });
+
+    it("returns 500 when the database throws during reset", async () => {
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await reset();
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during reset", async () => {
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await reset();
+      expect(res.status).toBe(500);
+    });
   });
 });

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

@@ -152,6 +152,18 @@ describe("leaderboards route", () => {
     expect(typeof body.entries[0]?.activeTitle).toBe("string");
   });
 
+  it("returns 500 when the database throws", async () => {
+    vi.mocked(prisma.player.findMany).mockRejectedValueOnce(new Error("DB error"));
+    const res = await get();
+    expect(res.status).toBe(500);
+  });
+
+  it("returns 500 when the database throws a non-Error value", async () => {
+    vi.mocked(prisma.player.findMany).mockRejectedValueOnce("raw string error");
+    const res = await get();
+    expect(res.status).toBe(500);
+  });
+
   it("defaults to 0 for game-state categories when state is missing", async () => {
     vi.mocked(prisma.player.findMany).mockResolvedValueOnce([makePlayer({ discordId: "p1" })] as never);
     vi.mocked(prisma.gameState.findMany).mockResolvedValueOnce([] as never);

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

@@ -93,6 +93,18 @@ describe("prestige route", () => {
       expect(body.runestones).toBeGreaterThanOrEqual(0);
     });
 
+    it("returns 500 when the database throws during prestige", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await post("");
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during prestige", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await post("");
+      expect(res.status).toBe(500);
+    });
+
     it("updates daily challenge progress when dailyChallenges are set", async () => {
       const state = makeState({
         dailyChallenges: {
@@ -152,5 +164,17 @@ describe("prestige route", () => {
       expect(body.runestonesRemaining).toBe(90); // 100 - 10
       expect(body.purchasedUpgradeIds).toContain("income_1");
     });
+
+    it("returns 500 when the database throws during buy-upgrade", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await post("/buy-upgrade", { upgradeId: "income_1" });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during buy-upgrade", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await post("/buy-upgrade", { upgradeId: "income_1" });
+      expect(res.status).toBe(500);
+    });
   });
 });

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

@@ -182,6 +182,18 @@ describe("profile route", () => {
       expect(unknown?.name).toBe("unknown_title_id");
     });
 
+    it("returns 500 when the database throws during profile get", async () => {
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await app.fetch(new Request(`http://localhost/profile/${DISCORD_ID}`));
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during profile get", async () => {
+      vi.mocked(prisma.player.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await app.fetch(new Request(`http://localhost/profile/${DISCORD_ID}`));
+      expect(res.status).toBe(500);
+    });
+
     it("includes completed story chapters in profile response", async () => {
       const state = makeState({
         story: {
@@ -256,5 +268,23 @@ describe("profile route", () => {
       const body = await res.json() as { profileSettings: { numberFormat: string } };
       expect(body.profileSettings.numberFormat).toBe("suffix");
     });
+
+    it("returns 500 when the database throws during profile update", async () => {
+      vi.mocked(prisma.player.update).mockRejectedValueOnce(new Error("DB error"));
+      const res = await put({
+        characterName: "NewName",
+        profileSettings: { numberFormat: "suffix" },
+      });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during profile update", async () => {
+      vi.mocked(prisma.player.update).mockRejectedValueOnce("raw string error");
+      const res = await put({
+        characterName: "NewName",
+        profileSettings: { numberFormat: "suffix" },
+      });
+      expect(res.status).toBe(500);
+    });
   });
 });

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

@@ -92,6 +92,18 @@ describe("transcendence route", () => {
       expect(body.newTranscendenceCount).toBe(1);
       expect(body.echoes).toBeGreaterThanOrEqual(0);
     });
+
+    it("returns 500 when the database throws during transcendence", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await post("");
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during transcendence", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await post("");
+      expect(res.status).toBe(500);
+    });
   });
 
   describe("POST /buy-upgrade", () => {
@@ -149,5 +161,17 @@ describe("transcendence route", () => {
       expect(body.echoesRemaining).toBe(95); // 100 - 5
       expect(body.purchasedUpgradeIds).toContain("echo_income_1");
     });
+
+    it("returns 500 when the database throws during buy-upgrade", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce(new Error("DB error"));
+      const res = await post("/buy-upgrade", { upgradeId: "echo_income_1" });
+      expect(res.status).toBe(500);
+    });
+
+    it("returns 500 when the database throws a non-Error value during buy-upgrade", async () => {
+      vi.mocked(prisma.gameState.findUnique).mockRejectedValueOnce("raw string error");
+      const res = await post("/buy-upgrade", { upgradeId: "echo_income_1" });
+      expect(res.status).toBe(500);
+    });
   });
 });

apps/api/test/services/discord.spec.ts

@@ -86,5 +86,22 @@ describe("discord service", () => {
       expect(result.id).toBe("123");
       expect(result.username).toBe("testuser");
     });
+
+    it("re-throws when fetch rejects with a non-Error value", async () => {
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { fetchDiscordUser } = await import("../../src/services/discord.js");
+      await expect(fetchDiscordUser("some_token")).rejects.toBe("raw string error");
+    });
+  });
+
+  describe("exchangeCode non-Error throw", () => {
+    it("re-throws when fetch rejects with a non-Error value", async () => {
+      process.env["DISCORD_CLIENT_ID"] = "cid";
+      process.env["DISCORD_CLIENT_SECRET"] = "secret";
+      process.env["DISCORD_REDIRECT_URI"] = "http://localhost/cb";
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { exchangeCode } = await import("../../src/services/discord.js");
+      await expect(exchangeCode("some_code")).rejects.toBe("raw string error");
+    });
   });
 });

apps/api/test/services/webhook.spec.ts

@@ -69,6 +69,15 @@ describe("webhook service", () => {
       const { grantApotheosisRole } = await import("../../src/services/webhook.js");
       await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
     });
+
+    it("swallows non-Error fetch rejections gracefully", async () => {
+      process.env["DISCORD_BOT_TOKEN"] = "tok";
+      process.env["DISCORD_GUILD_ID"] = "g";
+      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "r";
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
+      await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
+    });
   });
 
   describe("postMilestoneWebhook", () => {
@@ -119,5 +128,12 @@ describe("webhook service", () => {
       const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
       await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
     });
+
+    it("swallows non-Error fetch rejections gracefully", async () => {
+      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
+      await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
+    });
   });
 });

apps/web/index.html

@@ -5,6 +5,39 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Elysium — Idle RPG</title>
     <meta name="description" content="An idle fantasy RPG — hire adventurers, defeat bosses, and ascend to glory." />
+
+    <!-- Open Graph -->
+    <meta property="og:title" content="Elysium — Idle RPG" />
+    <meta property="og:description" content="An idle fantasy RPG — hire adventurers, defeat bosses, and ascend to glory." />
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://elysium.nhcarrigan.com" />
+    <meta property="og:image" content="https://cdn.nhcarrigan.com/elysium/background.jpg" />
+    <meta property="og:site_name" content="Elysium" />
+
+    <!-- Twitter Card -->
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content="Elysium — Idle RPG" />
+    <meta name="twitter:description" content="An idle fantasy RPG — hire adventurers, defeat bosses, and ascend to glory." />
+    <meta name="twitter:image" content="https://cdn.nhcarrigan.com/elysium/background.jpg" />
+
+    <!-- Plausible Analytics -->
+    <script defer data-domain="elysium.nhcarrigan.com" src="https://plausible.io/js/script.js"></script>
+
+    <!-- Tree-Nation -->
+    <script defer src="https://widgets.tree-nation.com/js/widgets/v1/widgets.min.js?v=1.0"></script>
+    <script>
+      (function () {
+        var interval = setInterval(function () {
+          if (typeof TreeNation !== "undefined") {
+            clearInterval(interval);
+            TreeNation.renderAll();
+          }
+        }, 100);
+      }());
+    </script>
+
+    <!-- Google Ads -->
+    <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-3569924701890974" crossorigin="anonymous"></script>
   </head>
   <body>
     <div id="root"></div>

apps/web/src/components/errorBoundary.tsx

@@ -0,0 +1,70 @@
+/**
+ * @file React Error Boundary for catching unhandled render-time errors.
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+import { Component, type ErrorInfo, type ReactNode } from "react";
+import { logError } from "../utils/logError.js";
+
+interface ErrorBoundaryProperties {
+  readonly children: ReactNode;
+}
+
+interface ErrorBoundaryState {
+  hasError: boolean;
+}
+
+/**
+ * Catches unhandled render-time errors in the React tree, logs them to the
+ * backend telemetry service, and renders a fallback UI.
+ */
+class ErrorBoundary extends Component<
+  ErrorBoundaryProperties,
+  ErrorBoundaryState
+> {
+  // eslint-disable-next-line jsdoc/require-jsdoc -- React Error Boundary constructor is standard boilerplate
+  public constructor(properties: ErrorBoundaryProperties) {
+    super(properties);
+    this.state = { hasError: false };
+  }
+
+  /**
+   * Updates state so the next render shows the fallback UI.
+   * @returns The updated error boundary state.
+   */
+  public static getDerivedStateFromError(): ErrorBoundaryState {
+    return { hasError: true };
+  }
+
+  /**
+   * Logs the error to the backend telemetry service.
+   * @param error - The error that was thrown during render.
+   * @param info - React error info containing the component stack trace.
+   */
+  // eslint-disable-next-line @typescript-eslint/class-methods-use-this -- React lifecycle method cannot be static
+  public override componentDidCatch(error: Error, info: ErrorInfo): void {
+    logError("react_error_boundary", error, info.componentStack);
+  }
+
+  /**
+   * Renders the fallback UI when an error is caught, otherwise renders children.
+   * @returns The JSX element.
+   */
+  public override render(): ReactNode {
+    const { hasError } = this.state;
+    const { children } = this.props;
+
+    if (hasError) {
+      return (
+        <div className="error-screen">
+          <p>{"Something went wrong. Please refresh the page."}</p>
+        </div>
+      );
+    }
+
+    return children;
+  }
+}
+
+export { ErrorBoundary };

apps/web/src/components/game/characterPage.tsx

@@ -14,6 +14,7 @@ import {
   type PublicProfileResponse,
 } from "@elysium/types";
 import { type JSX, useEffect, useState } from "react";
+import { logError } from "../../utils/logError.js";
 
 interface CharacterPageProperties {
   readonly discordId: string;
@@ -78,12 +79,16 @@ const CharacterPage = ({ discordId }: CharacterPageProperties): JSX.Element => {
   }, [ discordId ]);
 
   function handleCopy(): void {
-    void navigator.clipboard.writeText(window.location.href).then(() => {
-      setCopied(true);
-      setTimeout(() => {
-        setCopied(false);
-      }, 2000);
-    });
+    void navigator.clipboard.writeText(window.location.href).
+      then(() => {
+        setCopied(true);
+        setTimeout(() => {
+          setCopied(false);
+        }, 2000);
+      }).
+      catch((error_: unknown) => {
+        logError("clipboard_copy", error_);
+      });
   }
 
   if (error !== null) {

apps/web/src/components/game/characterSheetPanel.tsx

@@ -19,6 +19,7 @@ import {
 import { type ChangeEvent, type JSX, useEffect, useRef, useState } from "react";
 import { updateProfile } from "../../api/client.js";
 import { useGame } from "../../context/gameContext.js";
+import { logError } from "../../utils/logError.js";
 
 interface EquippedItem {
   name:   string;
@@ -205,12 +206,16 @@ const CharacterSheetPanel = (): JSX.Element => {
   function handleShareClick(): void {
     const discordId = player?.discordId ?? "";
     const url = `${window.location.origin}/character/${discordId}`;
-    void navigator.clipboard.writeText(url).then(() => {
-      setCopied(true);
-      setTimeout(() => {
-        setCopied(false);
-      }, 2000);
-    });
+    void navigator.clipboard.writeText(url).
+      then(() => {
+        setCopied(true);
+        setTimeout(() => {
+          setCopied(false);
+        }, 2000);
+      }).
+      catch((error_: unknown) => {
+        logError("clipboard_copy", error_);
+      });
   }
 
   function handleNameChange(event: ChangeEvent<HTMLInputElement>): void {

apps/web/src/components/game/gameLayout.tsx

@@ -189,6 +189,7 @@ const GameLayout = (): JSX.Element => {
       <div className="game-main">
         <aside className="game-sidebar">
           <ClickArea />
+          <div id="tree-nation-offset-website" />
           <p className="game-copyright">{"© NHCarrigan"}</p>
         </aside>
 

apps/web/src/components/game/profilePage.tsx

@@ -8,6 +8,7 @@
 /* eslint-disable complexity -- Many conditional stat visibility checks */
 import { useEffect, useState, type JSX } from "react";
 import { formatNumber } from "../../utils/format.js";
+import { logError } from "../../utils/logError.js";
 import type { PublicProfileResponse } from "@elysium/types";
 
 interface ProfilePageProperties {
@@ -52,12 +53,16 @@ const ProfilePage = ({ discordId }: ProfilePageProperties): JSX.Element => {
   }, [ discordId ]);
 
   function handleCopy(): void {
-    void navigator.clipboard.writeText(window.location.href).then(() => {
-      setCopied(true);
-      setTimeout(() => {
-        setCopied(false);
-      }, 2000);
-    });
+    void navigator.clipboard.writeText(window.location.href).
+      then(() => {
+        setCopied(true);
+        setTimeout(() => {
+          setCopied(false);
+        }, 2000);
+      }).
+      catch((error_: unknown) => {
+        logError("clipboard_copy", error_);
+      });
   }
 
   if (error !== null) {

apps/web/src/context/gameContext.tsx

@@ -59,6 +59,7 @@ import {
 } from "../engine/tick.js";
 import { updateChallengeProgress } from "../utils/dailyChallenges.js";
 import { formatNumber as formatNumberUtil } from "../utils/format.js";
+import { logError } from "../utils/logError.js";
 import { sendNotification } from "../utils/notification.js";
 import { playSound } from "../utils/sound.js";
 
@@ -1130,6 +1131,8 @@ export const GameProvider = ({
               ) {
                 signatureReference.current = null;
                 localStorage.removeItem("elysium_save_signature");
+              } else {
+                logError("auto_save", error_);
               }
             });
         }
@@ -1158,7 +1161,8 @@ export const GameProvider = ({
             }
             await reloadReference.current();
           }).
-          catch(() => {
+          catch((error_: unknown) => {
+            logError("auto_prestige", error_);
 
             /* Silently ignore — will retry next tick */
           }).
@@ -1200,7 +1204,8 @@ export const GameProvider = ({
               });
               setBattleResult({ bossName, result });
             }).
-            catch(() => {
+            catch((error_: unknown) => {
+              logError("auto_boss", error_);
 
               /* Silently ignore — will retry next tick */
             }).
@@ -1521,35 +1526,46 @@ export const GameProvider = ({
           },
         };
       });
-    } catch {
+    } catch (error_: unknown) {
+      logError("buy_prestige_upgrade", error_);
       // Silently ignore — server errors shouldn't crash the UI
     }
   }, []);
 
   const transcend = useCallback(async() => {
-    const result = await transcendApi({});
-    setShowTranscendenceToast(true);
-    if (enableSoundsReference.current) {
-      playSound("transcendence");
+    try {
+      const result = await transcendApi({});
+      setShowTranscendenceToast(true);
+      if (enableSoundsReference.current) {
+        playSound("transcendence");
+      }
+      if (enableNotificationsReference.current) {
+        sendNotification("🌌 Transcendence!", "You have transcended reality!");
+      }
+      await reload();
+      return result;
+    } catch (error_: unknown) {
+      logError("transcend", error_);
+      throw error_;
     }
-    if (enableNotificationsReference.current) {
-      sendNotification("🌌 Transcendence!", "You have transcended reality!");
-    }
-    await reload();
-    return result;
   }, [ reload ]);
 
   const apotheosis = useCallback(async() => {
-    const result = await achieveApotheosisApi({});
-    setShowApotheosisToast(true);
-    if (enableSoundsReference.current) {
-      playSound("apotheosis");
+    try {
+      const result = await achieveApotheosisApi({});
+      setShowApotheosisToast(true);
+      if (enableSoundsReference.current) {
+        playSound("apotheosis");
+      }
+      if (enableNotificationsReference.current) {
+        sendNotification("✨ Apotheosis!", "You have achieved godhood!");
+      }
+      await reload();
+      return result;
+    } catch (error_: unknown) {
+      logError("apotheosis", error_);
+      throw error_;
     }
-    if (enableNotificationsReference.current) {
-      sendNotification("✨ Apotheosis!", "You have achieved godhood!");
-    }
-    await reload();
-    return result;
   }, [ reload ]);
 
   const buyEchoUpgrade = useCallback(async(upgradeId: string) => {
@@ -1575,114 +1591,125 @@ export const GameProvider = ({
           },
         };
       });
-    } catch {
-      // Silently ignore server errors
+    } catch (error_: unknown) {
+      logError("buy_echo_upgrade", error_);
+      // Silently ignore — server errors shouldn't crash the UI
     }
   }, []);
 
   const startExploration = useCallback(async(areaId: string) => {
-    const response = await startExplorationApi({ areaId });
-    const areaData = EXPLORATION_AREAS.find((a) => {
-      return a.id === areaId;
-    });
-    if (areaData === undefined) {
-      return;
-    }
-    // eslint-disable-next-line stylistic/no-mixed-operators -- duration * 1000 is clear
-    const startedAt = response.endsAt - areaData.durationSeconds * 1000;
-    setState((previous) => {
-      if (previous?.exploration === undefined) {
-        return previous;
+    try {
+      const response = await startExplorationApi({ areaId });
+      const areaData = EXPLORATION_AREAS.find((a) => {
+        return a.id === areaId;
+      });
+      if (areaData === undefined) {
+        return;
       }
-      return {
-        ...previous,
-        exploration: {
-          ...previous.exploration,
-          areas: previous.exploration.areas.map((a) => {
-            return a.id === areaId
-              ? { ...a, startedAt: startedAt, status: "in_progress" as const }
-              : a;
-          }),
-        },
-      };
-    });
-  }, []);
-
-  const collectExploration = useCallback(
-    async(areaId: string): Promise<ExploreCollectResponse> => {
-      const result = await collectExplorationApi({ areaId });
+      // eslint-disable-next-line stylistic/no-mixed-operators -- duration * 1000 is clear
+      const startedAt = response.endsAt - areaData.durationSeconds * 1000;
       setState((previous) => {
         if (previous?.exploration === undefined) {
           return previous;
         }
-        let materials = [ ...previous.exploration.materials ];
-
-        // Apply material drops from the random loot roll
-        for (const drop of result.materialsFound) {
-          const existing = materials.find((mat) => {
-            return mat.materialId === drop.materialId;
-          });
-          if (existing === undefined) {
-            materials = [
-              ...materials,
-              { materialId: drop.materialId, quantity: drop.quantity },
-            ];
-          } else {
-            materials = materials.map((mat) => {
-              return mat.materialId === drop.materialId
-                ? { ...mat, quantity: mat.quantity + drop.quantity }
-                : mat;
-            });
-          }
-        }
-
-        // Apply material from event (if any)
-        const materialGained = result.event?.materialGained;
-        if (materialGained !== null && materialGained !== undefined) {
-          const { materialId, quantity } = materialGained;
-          const existing = materials.find((mat) => {
-            return mat.materialId === materialId;
-          });
-          if (existing === undefined) {
-            materials = [ ...materials, { materialId, quantity } ];
-          } else {
-            materials = materials.map((mat) => {
-              return mat.materialId === materialId
-                ? { ...mat, quantity: mat.quantity + quantity }
-                : mat;
-            });
-          }
-        }
-
         return {
           ...previous,
           exploration: {
             ...previous.exploration,
             areas: previous.exploration.areas.map((a) => {
               return a.id === areaId
-                ? { ...a, completedOnce: true, status: "available" as const }
+                ? { ...a, startedAt: startedAt, status: "in_progress" as const }
                 : a;
             }),
-            materials: materials,
-          },
-          player: {
-            ...previous.player,
-            totalGoldEarned:
-              previous.player.totalGoldEarned
-              + Math.max(0, result.event?.goldChange ?? 0),
-          },
-          resources: {
-            ...previous.resources,
-            essence:
-              previous.resources.essence + (result.event?.essenceChange ?? 0),
-            gold: Math.max(
-              0,
-              previous.resources.gold + (result.event?.goldChange ?? 0),
-            ),
           },
         };
       });
-      return result;
+    } catch (error_: unknown) {
+      logError("start_exploration", error_);
+      throw error_;
+    }
+  }, []);
+
+  const collectExploration = useCallback(
+    async(areaId: string): Promise<ExploreCollectResponse> => {
+      try {
+        const result = await collectExplorationApi({ areaId });
+        setState((previous) => {
+          if (previous?.exploration === undefined) {
+            return previous;
+          }
+          let materials = [ ...previous.exploration.materials ];
+
+          // Apply material drops from the random loot roll
+          for (const drop of result.materialsFound) {
+            const existing = materials.find((mat) => {
+              return mat.materialId === drop.materialId;
+            });
+            if (existing === undefined) {
+              materials = [
+                ...materials,
+                { materialId: drop.materialId, quantity: drop.quantity },
+              ];
+            } else {
+              materials = materials.map((mat) => {
+                return mat.materialId === drop.materialId
+                  ? { ...mat, quantity: mat.quantity + drop.quantity }
+                  : mat;
+              });
+            }
+          }
+
+          // Apply material from event (if any)
+          const materialGained = result.event?.materialGained;
+          if (materialGained !== null && materialGained !== undefined) {
+            const { materialId, quantity } = materialGained;
+            const existing = materials.find((mat) => {
+              return mat.materialId === materialId;
+            });
+            if (existing === undefined) {
+              materials = [ ...materials, { materialId, quantity } ];
+            } else {
+              materials = materials.map((mat) => {
+                return mat.materialId === materialId
+                  ? { ...mat, quantity: mat.quantity + quantity }
+                  : mat;
+              });
+            }
+          }
+
+          return {
+            ...previous,
+            exploration: {
+              ...previous.exploration,
+              areas: previous.exploration.areas.map((a) => {
+                return a.id === areaId
+                  ? { ...a, completedOnce: true, status: "available" as const }
+                  : a;
+              }),
+              materials: materials,
+            },
+            player: {
+              ...previous.player,
+              totalGoldEarned:
+                previous.player.totalGoldEarned
+                + Math.max(0, result.event?.goldChange ?? 0),
+            },
+            resources: {
+              ...previous.resources,
+              essence:
+                previous.resources.essence + (result.event?.essenceChange ?? 0),
+              gold: Math.max(
+                0,
+                previous.resources.gold + (result.event?.goldChange ?? 0),
+              ),
+            },
+          };
+        });
+        return result;
+      } catch (error_: unknown) {
+        logError("collect_exploration", error_);
+        throw error_;
+      }
     },
     [],
   );
@@ -1694,35 +1721,40 @@ export const GameProvider = ({
     if (recipe === undefined) {
       return;
     }
-    const result = await craftRecipeApi({ recipeId });
-    setState((previous) => {
-      if (previous?.exploration === undefined) {
-        return previous;
-      }
-      let materials = [ ...previous.exploration.materials ];
-      for (const request of recipe.requiredMaterials) {
-        materials = materials.map((mat) => {
-          return mat.materialId === request.materialId
-            ? { ...mat, quantity: mat.quantity - request.quantity }
-            : mat;
-        });
-      }
-      return {
-        ...previous,
-        exploration: {
-          ...previous.exploration,
-          craftedClickMultiplier:   result.craftedClickMultiplier,
-          craftedCombatMultiplier:  result.craftedCombatMultiplier,
-          craftedEssenceMultiplier: result.craftedEssenceMultiplier,
-          craftedGoldMultiplier:    result.craftedGoldMultiplier,
-          craftedRecipeIds:         [
-            ...previous.exploration.craftedRecipeIds,
-            recipeId,
-          ],
-          materials: materials,
-        },
-      };
-    });
+    try {
+      const result = await craftRecipeApi({ recipeId });
+      setState((previous) => {
+        if (previous?.exploration === undefined) {
+          return previous;
+        }
+        let materials = [ ...previous.exploration.materials ];
+        for (const request of recipe.requiredMaterials) {
+          materials = materials.map((mat) => {
+            return mat.materialId === request.materialId
+              ? { ...mat, quantity: mat.quantity - request.quantity }
+              : mat;
+          });
+        }
+        return {
+          ...previous,
+          exploration: {
+            ...previous.exploration,
+            craftedClickMultiplier:   result.craftedClickMultiplier,
+            craftedCombatMultiplier:  result.craftedCombatMultiplier,
+            craftedEssenceMultiplier: result.craftedEssenceMultiplier,
+            craftedGoldMultiplier:    result.craftedGoldMultiplier,
+            craftedRecipeIds:         [
+              ...previous.exploration.craftedRecipeIds,
+              recipeId,
+            ],
+            materials: materials,
+          },
+        };
+      });
+    } catch (error_: unknown) {
+      logError("craft_recipe", error_);
+      throw error_;
+    }
   }, []);
 
   const toggleAutoPrestige = useCallback(() => {
@@ -1798,7 +1830,8 @@ export const GameProvider = ({
         return applyBossResult(previous, bossId, result);
       });
       setBattleResult({ bossName: boss.name, result: result });
-    } catch {
+    } catch (error_: unknown) {
+      logError("challenge_boss", error_);
       // Silently ignore — server errors shouldn't crash the UI
     }
   }, []);

apps/web/src/main.tsx

@@ -8,8 +8,12 @@
 import { StrictMode } from "react";
 import { createRoot } from "react-dom/client";
 import { App } from "./app.js";
+import { ErrorBoundary } from "./components/errorBoundary.js";
+import { initialiseFrontendLogger } from "./utils/logger.js";
 import "./styles.css";
 
+initialiseFrontendLogger();
+
 const rootElement = document.getElementById("root");
 
 if (!rootElement) {
@@ -18,6 +22,8 @@ if (!rootElement) {
 
 createRoot(rootElement).render(
   <StrictMode>
-    <App />
+    <ErrorBoundary>
+      <App />
+    </ErrorBoundary>
   </StrictMode>,
 );

apps/web/src/styles.css

@@ -26,6 +26,7 @@
   --radius: 8px;
   --radius-lg: 12px;
   --font: "Segoe UI", system-ui, sans-serif;
+  --resource-bar-height: 3.5rem;
 }
 
 body {
@@ -136,6 +137,10 @@ body::before {
   flex-direction: column;
   align-items: center;
   gap: 1rem;
+  position: sticky;
+  top: var(--resource-bar-height);
+  height: calc(100vh - var(--resource-bar-height));
+  overflow-y: auto;
 }
 
 .game-content {
@@ -3181,8 +3186,11 @@ body::before {
     border-right: none;
     flex-direction: row;
     gap: 0.75rem;
+    height: auto;
     justify-content: center;
     padding: 0.5rem 0.75rem;
+    position: static;
+    top: auto;
     width: 100%;
   }
 

apps/web/src/utils/logError.ts

@@ -0,0 +1,19 @@
+/**
+ * @file Frontend error logging utility that forwards errors to the backend telemetry service.
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+/* eslint-disable no-console -- Errors are forwarded to backend via the overridden console.error */
+
+/**
+ * Logs an error to the backend telemetry service.
+ * Accepts the same arguments as console.error — conventionally a context string
+ * followed by the error value.
+ * @param logArguments - The values to log, forwarded directly to console.error.
+ */
+const logError = (...logArguments: Array<unknown>): void => {
+  console.error(...logArguments);
+};
+
+export { logError };

apps/web/src/utils/logger.ts

@@ -0,0 +1,68 @@
+/**
+ * @file Frontend logger that forwards console output to the backend telemetry service.
+ * @copyright nhcarrigan
+ * @license Naomi's Public License
+ * @author Naomi Carrigan
+ */
+/* eslint-disable no-console -- This file intentionally overrides console methods */
+
+type Level = "debug" | "info" | "warn";
+
+const post = (path: string, body: object): void => {
+  void fetch(path, {
+    body:    JSON.stringify(body),
+    // eslint-disable-next-line @typescript-eslint/naming-convention -- HTTP header names use kebab-case
+    headers: { "Content-Type": "application/json" },
+    method:  "POST",
+  }).catch(() => {
+    // Intentionally swallowed — we cannot log logger failures without infinite recursion.
+  });
+};
+
+/**
+ * Overrides the global console.log and console.error methods so that all
+ * frontend log output is forwarded to the backend telemetry endpoints.
+ * Must be called once at application startup before any other code runs.
+ */
+const initialiseFrontendLogger = (): void => {
+  const originalLog = console.log.bind(console);
+  const originalError = console.error.bind(console);
+
+  console.log = (...consoleArguments: Array<unknown>): void => {
+    originalLog(...consoleArguments);
+    const level: Level = "info";
+    const message = consoleArguments.map((argument) => {
+      return typeof argument === "string"
+        ? argument
+        : JSON.stringify(argument);
+    }).join(" ");
+    post("/api/fe/log", { level, message });
+  };
+
+  console.error = (...consoleArguments: Array<unknown>): void => {
+    originalError(...consoleArguments);
+    const message = consoleArguments.map((argument) => {
+      if (argument instanceof Error) {
+        return `${argument.message}\n${argument.stack ?? ""}`;
+      }
+      return typeof argument === "string"
+        ? argument
+        : JSON.stringify(argument);
+    }).join(" ");
+    const context = "console.error";
+    post("/api/fe/error", { context, message });
+  };
+
+  console.warn = (...consoleArguments: Array<unknown>): void => {
+    originalLog(...consoleArguments);
+    const level: Level = "warn";
+    const message = consoleArguments.map((argument) => {
+      return typeof argument === "string"
+        ? argument
+        : JSON.stringify(argument);
+    }).join(" ");
+    post("/api/fe/log", { level, message });
+  };
+};
+
+export { initialiseFrontendLogger };

apps/web/src/utils/notification.ts

@@ -4,6 +4,7 @@
  * @license Naomi's Public License
  * @author Naomi Carrigan
  */
+import { logError } from "./logError.js";
 
 /**
  * Requests browser notification permission from the user.
@@ -38,7 +39,8 @@ const sendNotification = (title: string, body: string): void => {
   try {
     // eslint-disable-next-line no-new -- Notification constructor has side effects
     new Notification(title, { body: body, icon: "/favicon.ico" });
-  } catch {
+  } catch (error_: unknown) {
+    logError("send_notification", error_);
     // Silently ignore — notifications may fail silently
   }
 };

apps/web/src/utils/sound.ts

@@ -4,6 +4,7 @@
  * @license Naomi's Public License
  * @author Naomi Carrigan
  */
+import { logError } from "./logError.js";
 
 type SoundEvent =
   | "achievement"
@@ -101,7 +102,8 @@ const playSound = (event: SoundEvent): void => {
       oscillator.start(startTime);
       oscillator.stop(endTime);
     }
-  } catch {
+  } catch (error_: unknown) {
+    logError("play_sound", error_);
     // Silently ignore — audio may not be available in all environments
   }
 };