FastRoute rejected /api/texts/all because the previously
declared variable route /api/texts/{textId} would shadow it,
crashing the app on boot. move the admin all-texts endpoint
to /api/admin/texts to clear the conflict; admin texts.js
follows the new URL.
open POST /api/texts and node create endpoints to any
authenticated user; expose new /texts and /texts/{id} pages
plus admin-only GET /api/texts/all. ViewController gains
userTexts and userText methods. seed gives Tanach to the
regular user and adds a second non-admin user.
