Fix sharp in container, add admin downloads and anchor mark

- ship libvips with the runtime image so POST /api/v1/media stops failing
- admin downloads openapi.json and the style guide via session, no token
- copy rows for both API addresses
- anchor mark in the wordmark and a favicon

src/app/api/v1/openapi.json/route.ts

@@ -1,5 +1,5 @@
 import { resolveClient } from '~/lib/api-auth'
-import { openApiDocument } from '~/lib/openapi'
+import { openApiResponse } from '~/lib/api-docs'
 import { problem } from '~/lib/problem'
 
 export async function GET(request: Request) {
@@ -10,12 +10,6 @@ export async function GET(request: Request) {
 	}
 
 	const url = new URL(request.url)
-	const document = openApiDocument(process.env.BETTER_AUTH_URL ?? url.origin)
 
-	return new Response(JSON.stringify(document, null, '\t'), {
-		headers: {
-			'content-type': 'application/json; charset=utf-8',
-			'content-disposition': 'attachment; filename="logbuch-openapi.json"',
-		},
-	})
+	return openApiResponse(process.env.BETTER_AUTH_URL ?? url.origin)
 }