The image module is not tied to OpenRouter any more

`IMAGE_API_BASE_URL` decides where the image requests go. The default is still
OpenRouter — one key, many models, and the model list in the admin area fills
itself in — but the request body was already written in the OpenAI image shape,
so pointing it at a LiteLLM gateway, a company proxy or a server of your own
works. `GET /images/models` is an OpenRouter route; a base that answers 404 is
treated as "cannot list models", not as an error, and the model id is typed
instead. `IMAGE_API_KEY` is the new name; `OPENROUTER_API_KEY` is still read so
existing instances keep working.

Also: the seeded example recipes now show four different task combinations
rather than four sizes — clean up, poster, cut out to transparent PNG, sticker
with contour, square for social. They are examples to read and replace.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nh4A79bbqT9dcd2inzYUdg

.env.example

@@ -73,9 +73,20 @@ PUBLIC_BASE_URL=http://localhost:4321
 # ─────────────────────────────────────────────────────────────────────────────
 # 4. Module: ai — image generation
 # ─────────────────────────────────────────────────────────────────────────────
-# Klarbild calls image models through OpenRouter. This costs money per image.
-# The key can also be entered in the admin area; the database value wins.
+# Klarbild calls image models over an OpenAI-shaped images endpoint. This costs
+# money per image, whoever you call. The key can also be entered in the admin
+# area, and that value wins over anything set here.
 
+IMAGE_API_KEY=
+
+# Where those requests go. The default is OpenRouter, which is one key for many
+# models. Point this at anything that answers POST {base}/images in the OpenAI
+# image shape — a LiteLLM gateway, a company proxy, a server of your own — and
+# Klarbild talks to that instead.
+IMAGE_API_BASE_URL=https://openrouter.ai/api/v1
+
+# The old name for IMAGE_API_KEY. Still read, so instances set up before the
+# endpoint became configurable keep working.
 OPENROUTER_API_KEY=
 
 # ─────────────────────────────────────────────────────────────────────────────