Fix build errors and complete help documentation setup

- Fix JSON syntax error in Basque translation file (eu/help.json)
  * Fixed multi-line string that was breaking JSON parsing
- Add missing frontend/src/lib/utils.ts file
  * Created cn() utility function for merging CSS class names
  * Required by UI components (Progress, Alert, Accordion)
- Update package-lock.json from npm install

These changes fix build errors and ensure the help/docs pages work correctly with i18n translations.

frontend/package-lock.json

@@ -138,7 +138,6 @@
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@@ -2289,6 +2290,7 @@
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+      "peer": true,
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         "@formatjs/icu-skeleton-parser": "1.8.16",
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+      "peer": true,
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+      "peer": true,
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@@ -2738,7 +2742,6 @@
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@@ -6041,7 +6044,6 @@
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@@ -7758,7 +7754,6 @@
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@@ -7964,7 +7959,6 @@
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@@ -8329,8 +8323,7 @@
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-      "license": "MIT",
+      "license": "MIT"
-      "peer": true
     },
     "node_modules/d3-array": {
       "version": "3.2.4",
@@ -8512,7 +8505,6 @@
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@@ -8555,7 +8547,8 @@
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-      "license": "MIT"
+      "license": "MIT",
+      "peer": true
     },
     "node_modules/decimal.js-light": {
       "version": "2.5.1",
@@ -9039,7 +9032,6 @@
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@@ -9143,7 +9135,6 @@
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@@ -10569,7 +10560,6 @@
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@@ -12777,7 +12766,6 @@
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frontend/src/lib/utils.ts

@@ -0,0 +1,6 @@
+import { type ClassValue, clsx } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}

frontend/src/locales/eu/help.json

@@ -146,9 +146,7 @@
     {
       "category": "general",
       "question": "Zer da Bakery AI eta nola funtzionatzen du?",
-      "answer": "Bakery AI kudeaketa plataforma adimentsua da okindegieta
+      "answer": "Bakery AI kudeaketa plataforma adimentsua da okindegetarako. Adimen artifiziala erabiltzen du zure produktuen eskaria aurreikusteko, ekoizpena optimizatzeko, hondakinak murrizteko eta errentagarritasuna handitzeko."
-
-rako. Adimen artifiziala erabiltzen du zure produktuen eskaria aurreikusteko, ekoizpena optimizatzeko, hondakinak murrizteko eta errentagarritasuna handitzeko."
     },
     {
       "category": "general",