diff --git a/proto/eslint.config.mjs b/proto/eslint.config.mjs
index 719cea2..d2ade2d 100755
--- a/proto/eslint.config.mjs
+++ b/proto/eslint.config.mjs
@@ -20,6 +20,25 @@ const eslintConfig = [
       "next-env.d.ts",
     ],
   },
+  {
+    // WHY: test suites legitimately use `any` mocks, jest globals and CommonJS
+    // require(); jest/playwright config files are CommonJS by design. Relax the
+    // strict rules there so lint failures point at real production-code issues.
+    files: [
+      "**/*.test.ts",
+      "**/*.test.tsx",
+      "jest.config*.js",
+      "jest.setup*.js",
+      "jest.globalSetup*.js",
+      "playwright.config.ts",
+    ],
+    rules: {
+      "@typescript-eslint/no-explicit-any": "off",
+      "@typescript-eslint/no-require-imports": "off",
+      "@typescript-eslint/no-unused-vars": "off",
+      "react/display-name": "off",
+    },
+  },
 ];
 
 export default eslintConfig;
diff --git a/proto/src/__tests__/integration.test.ts b/proto/src/__tests__/integration.test.ts
index 4ad251f..1958332 100755
--- a/proto/src/__tests__/integration.test.ts
+++ b/proto/src/__tests__/integration.test.ts
@@ -91,7 +91,8 @@ describe('Docker Environment Integration Tests', () => {
       
       const mozditDb = mongoClient.db('mozdit')
       const siteConfig = await mozditDb.collection('site_config').findOne()
-      
+
+      if (!siteConfig) throw new Error('site_config document not found')
       expect(siteConfig).toBeTruthy()
       expect(siteConfig).toHaveProperty('type', 'site_config')
       expect(siteConfig).toHaveProperty('environment', 'development')
diff --git a/proto/src/app/page.tsx b/proto/src/app/page.tsx
index bf1e9a1..2a62627 100755
--- a/proto/src/app/page.tsx
+++ b/proto/src/app/page.tsx
@@ -1,4 +1,3 @@
-import { siteConfig } from '@/config/site'
 import { content } from '@/content'
 
 const { home: pageContent } = content.pages
@@ -94,7 +93,7 @@ export default function Home() {
             </h2>
           </div>
           <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 stagger-children">
-            {pageContent.about.usps.map((usp: any, index: number) => (
+            {pageContent.about.usps.map((usp, index) => (
               <div 
                 key={usp.id} 
                 className="group text-center p-6 rounded-xl transition-all duration-300 hover-lift animate-fade-in-up"
diff --git a/proto/src/components/Footer.tsx b/proto/src/components/Footer.tsx
index 6a2d224..1260d05 100755
--- a/proto/src/components/Footer.tsx
+++ b/proto/src/components/Footer.tsx
@@ -2,6 +2,7 @@
 
 import { siteConfig } from '@/config/site'
 import { content } from '@/content'
+import Link from 'next/link'
 
 export default function Footer() {
   return (
@@ -16,7 +17,7 @@ export default function Footer() {
         <div className="grid grid-cols-1 md:grid-cols-4 gap-8 lg:gap-12">
           {/* Company Info */}
           <div className="md:col-span-2">
-            <a 
+            <Link 
               href="/" 
               className="inline-flex items-center gap-2 text-xl font-bold mb-4 transition-colors duration-200"
               style={{ color: 'var(--color-primary-600)' }}
@@ -26,7 +27,7 @@ export default function Footer() {
                 className="inline-block w-2 h-2 rounded-full animate-pulse-slow"
                 style={{ background: 'var(--color-success-500)' }}
               />
-            </a>
+            </Link>
             <p 
               className="mb-6 max-w-md leading-relaxed"
               style={{ color: 'var(--color-foreground-muted)' }}
@@ -104,7 +105,7 @@ export default function Footer() {
               Szolgáltatások
             </h3>
             <ul className="space-y-3">
-              {content.pages.home.services.items.map((service: any) => (
+              {content.pages.home.services.items.map((service) => (
                 <li 
                   key={service.id} 
                   className="flex items-center gap-2 text-sm"
diff --git a/proto/src/components/Header.tsx b/proto/src/components/Header.tsx
index 1f3dafb..836f8eb 100755
--- a/proto/src/components/Header.tsx
+++ b/proto/src/components/Header.tsx
@@ -4,6 +4,8 @@ import { siteConfig } from '@/config/site'
 import { common } from '@/content'
 import { useState, useEffect } from 'react'
 import { ThemeToggle } from './ThemeProvider'
+import Link from 'next/link'
+import Image from 'next/image'
 
 export default function Header() {
   const [isMenuOpen, setIsMenuOpen] = useState(false)
@@ -46,21 +48,23 @@ export default function Header() {
         <div className="flex justify-between items-center h-16">
           {/* Logo */}
           <div className="flex-shrink-0">
-            <a 
+            <Link 
               href="/" 
               className="group flex items-center gap-2 transition-all duration-200"
             >
-              <img 
+              <Image 
                 src="/mozdit_logo_text.png" 
                 alt={siteConfig.general.name} 
+                width={500}
+                height={115}
                 className="h-10 w-auto transition-transform duration-200 group-hover:scale-105"
               />
-            </a>
+            </Link>
           </div>
 
           {/* Desktop Navigation */}
           <div className="hidden md:flex items-center space-x-1">
-            {siteConfig.navigation.main.map((item, index) => (
+            {siteConfig.navigation.main.map((item) => (
               <a
                 key={item.href}
                 href={item.href}
diff --git a/proto/src/lib/logger.test.ts b/proto/src/lib/logger.test.ts
index 35ce73e..5d77895 100755
--- a/proto/src/lib/logger.test.ts
+++ b/proto/src/lib/logger.test.ts
@@ -23,7 +23,8 @@ describe('Logger', () => {
 
   it('should create logger with correct configuration', () => {
     // Set NODE_ENV to development to get debug level
-    process.env.NODE_ENV = 'development'
+    // NODE_ENV is typed read-only in @types/node — assign via a wider type.
+    ;(process.env as unknown as Record<string, string>).NODE_ENV = 'development'
     
     // Import after clearing modules
     require('./logger')
@@ -54,7 +55,7 @@ describe('Logger', () => {
     
     // Clear the mock calls to avoid interference from logger creation
     const mockLogger = mockedWinston.createLogger()
-    mockLogger.child.mockClear()
+    ;(mockLogger.child as jest.Mock).mockClear()
     
     const componentLogger = createComponentLogger('test-component')
     expect(logger.child).toHaveBeenCalledWith({ component: 'test-component' })
diff --git a/proto/src/lib/logger.ts b/proto/src/lib/logger.ts
index 0ad6672..8b026ca 100755
--- a/proto/src/lib/logger.ts
+++ b/proto/src/lib/logger.ts
@@ -92,7 +92,7 @@ export const generateRequestId = (): string =>
 export const withTiming = async <T>(
   operation: string,
   fn: () => Promise<T>,
-  metadata: any = {}
+  metadata: Record<string, unknown> = {}
 ): Promise<T> => {
   const startTime = Date.now()
   logger.debug(`Started ${operation}`, metadata)
diff --git a/proto/src/types/site.ts b/proto/src/types/site.ts
index ddd3baa..b9d77dc 100755
--- a/proto/src/types/site.ts
+++ b/proto/src/types/site.ts
@@ -74,7 +74,7 @@ export interface AboutSectionConfig {
 }
 
 export interface FooterConfig {
-  copyright: string
+  // copyright text lives in content/common.json (footer.copyright) — CMS-editable
   links: {
     label: string
     href: string
diff --git a/scripts/pre-deploy-tests.sh b/scripts/pre-deploy-tests.sh
index e9ad1ac..24f78da 100755
--- a/scripts/pre-deploy-tests.sh
+++ b/scripts/pre-deploy-tests.sh
@@ -24,6 +24,8 @@ run() {
 
 # ── Weboldal (proto) ─────────────────────────────────────────────────────────
 run "proto: unit tesztek (jest, 60+)" bash -c "cd '${ROOT}/proto' && npm test --silent"
+run "proto: típusellenőrzés (tsc --noEmit)" bash -c "cd '${ROOT}/proto' && npx tsc --noEmit"
+run "proto: lint (eslint)" bash -c "cd '${ROOT}/proto' && npm run lint"
 
 # ── Tartalom ─────────────────────────────────────────────────────────────────
 run "content: séma-validáció (minden JSON)" node "${ROOT}/scripts/test-content-schema.js"