Add sharp image processing library and update dependencies in package.json and package-lock.json; enhance Navigation component with new 'Galerie' link for improved user navigation.

tests/setup.ts

@@ -20,11 +20,20 @@ const getCookieStore = (event: any): CookieStore => {
 
 global.readBody = vi.fn(async (event: any) => event.__body ?? null)
 global.getQuery = (event: any) => event.__query ?? {}
+global.getRouterParam = (event: any, name: string) => {
+  return event.context?.params?.[name] ?? null
+}
 global.getHeader = (event: any, name: string) => {
   const headers = event.node?.req?.headers || {}
   const key = Object.keys(headers).find(h => h.toLowerCase() === name.toLowerCase())
   return key ? headers[key] : undefined
 }
+global.setHeader = vi.fn((event: any, name: string, value: string) => {
+  if (event.node?.res) {
+    event.node.res.headers = event.node.res.headers || {}
+    event.node.res.headers[name] = value
+  }
+})
 
 global.setCookie = (event: any, name: string, value: string, options = {}) => {
   const store = getCookieStore(event)