chore(lint): zero ESLint warnings, enforce --max-warnings=0

package.json

@@ -60,7 +60,7 @@
     "test:load:50": "LOG_LEVEL=info vitest run --project=load --testNamePattern='Load Test: 50 Concurrent Clients'",
     "test:load:100": "LOG_LEVEL=info vitest run --project=load --testNamePattern='Load Test: 100 Concurrent Clients'",
     "test:load:200": "LOG_LEVEL=info vitest run --project=load --testNamePattern='Load Test: 200 Concurrent Clients'",
-    "lint": "eslint . --ext .ts,.tsx",
+    "lint": "eslint . --ext .ts,.tsx --max-warnings=0",
     "prepare": "husky"
   },
   "dependencies": {

tests/client/tutor.test.tsx

@@ -163,9 +163,8 @@ describe("useTutor", () => {
 
   it("resets a pinned dialog when the active Course Content revision changes", async () => {
     setActiveExternalExampleContext({ repository: "owner/repo", ref: "main", revision: "a".repeat(40), exampleId: "arrays" });
-    const fetchMock = vi.spyOn(globalThis, "fetch").mockImplementation(async (input, init) => {
+    const fetchMock = vi.spyOn(globalThis, "fetch").mockImplementation(async (input) => {
       if (String(input) === "/api/config") return new Response(JSON.stringify({ tutor: { provider: "kiconnect" } }), { status: 200 });
-      const body = JSON.parse(String(init?.body ?? "{}")) as Record<string, unknown>;
       if (String(input) === "/api/tutor/question") {
         return new Response(JSON.stringify({
           question: "Frage",

tests/integration/concurrent-50-clients.test.ts

@@ -194,7 +194,7 @@ vi.mock("../../server/services/registry-manager", () => ({
 
 vi.mock("../../server/services/compiler-with-fallback", () => {
   class MockCompilerWithFallback {
-    async compile(code: string) {
+    async compile() {
       return { success: true, firmware: "deadbeef", errors: [], parsed: [] };
     }
     async shutdown() {

tests/server/load-suite.test.ts

@@ -447,7 +447,6 @@ function createLoadTestSuite(
       const outputDir = process.env.LOAD_TEST_OUTPUT_DIR;
       if (outputDir) {
         try {
-          const { saveTestMetrics } = await import('./load-suite.test');
           // saveTestMetrics(testResults, outputDir, numClients);
           console.log(`[LoadTest] Would save metrics to ${outputDir} (disabled to avoid circular dependency)`);
         } catch (err) {

tests/server/routes/shutdown-websocket.test.ts

@@ -1,5 +1,5 @@
 import express from "express";
-import { createServer, type Server } from "node:http";
+import type { Server } from "node:http";
 import type { AddressInfo } from "node:net";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import { WebSocket } from "ws";

tests/server/services/sandbox/cleanup-phase.test.ts

@@ -9,11 +9,9 @@
  * - Error-Pfade und No-op-Pfade
  */
 
-import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { describe, it, expect, vi } from "vitest";
 import { flushMessageQueue, flushBatchers, cleanupDockerContainer } from "../../../../server/services/sandbox/execution-phases/cleanup-phase";
 import type { ExecutionState } from "../../../../server/services/sandbox/execution-manager";
-import type { PinStateBatcher } from "../../pin-state-batcher";
-import type { SerialOutputBatcher } from "../../serial-output-batcher";
 
 // Mocks für Dependencies
 const createMockLogger = () => ({

tests/server/services/scalability-stress.test.ts

@@ -456,7 +456,7 @@ describe("Scalability stress: SandboxStartSemaphore", () => {
     let peakActive = 0;
     const queuings: number[] = [];
 
-    const promises = Array.from({ length: 10 }, (_, i) =>
+    const promises = Array.from({ length: 10 }, () =>
       (async () => {
         const start = Date.now();
         const release = await semaphore.acquire(() => {

tests/server/services/server-metrics.test.ts

@@ -54,7 +54,7 @@ describe("Server Metrics (Phase 3.9 Observability)", () => {
 
     it("should calculate CPU percentage from two samples", () => {
       // First call initializes baseline
-      const metrics1 = getProcessMetrics();
+      getProcessMetrics();
 
       // Second call should have CPU data
       const metrics2 = getProcessMetrics();