chore(quality): type-check and lint gates in pre-deploy, clean lint/tsc

- pre-deploy suite now runs tsc --noEmit and eslint; any failure aborts
  the release
- fix all TypeScript errors (FooterConfig.copyright removed after the CMS
  move; test guards/casts)
- fix all ESLint errors: <a>→<Link> and <img>→<Image> in Header/Footer,
  remove unused imports and explicit any in src
- eslint config relaxes no-explicit-any/no-require-imports/no-unused-vars
  for test and CommonJS config files (legitimate usage)

Closes MITHOME-81

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;